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cpython/Lib/test/test_argparse.py

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# Author: Steven J. Bethard <steven.bethard@gmail.com>.
import codecs
import inspect
import os
import shutil
import stat
import sys
import textwrap
import tempfile
import unittest
import argparse
from io import StringIO
from test import support
class StdIOBuffer(StringIO):
pass
class TestCase(unittest.TestCase):
def assertEqual(self, obj1, obj2):
if obj1 != obj2:
print('')
print(repr(obj1))
print(repr(obj2))
print(obj1)
print(obj2)
super(TestCase, self).assertEqual(obj1, obj2)
def setUp(self):
# The tests assume that line wrapping occurs at 80 columns, but this
# behaviour can be overridden by setting the COLUMNS environment
# variable. To ensure that this assumption is true, unset COLUMNS.
env = support.EnvironmentVarGuard()
env.unset("COLUMNS")
self.addCleanup(env.__exit__)
class TempDirMixin(object):
def setUp(self):
self.temp_dir = tempfile.mkdtemp()
self.old_dir = os.getcwd()
os.chdir(self.temp_dir)
def tearDown(self):
os.chdir(self.old_dir)
shutil.rmtree(self.temp_dir, True)
def create_readonly_file(self, filename):
file_path = os.path.join(self.temp_dir, filename)
with open(file_path, 'w') as file:
file.write(filename)
os.chmod(file_path, stat.S_IREAD)
class Sig(object):
def __init__(self, *args, **kwargs):
self.args = args
self.kwargs = kwargs
class NS(object):
def __init__(self, **kwargs):
self.__dict__.update(kwargs)
def __repr__(self):
sorted_items = sorted(self.__dict__.items())
kwarg_str = ', '.join(['%s=%r' % tup for tup in sorted_items])
return '%s(%s)' % (type(self).__name__, kwarg_str)
def __eq__(self, other):
return vars(self) == vars(other)
def __ne__(self, other):
return not (self == other)
class ArgumentParserError(Exception):
def __init__(self, message, stdout=None, stderr=None, error_code=None):
Exception.__init__(self, message, stdout, stderr)
self.message = message
self.stdout = stdout
self.stderr = stderr
self.error_code = error_code
def stderr_to_parser_error(parse_args, *args, **kwargs):
# if this is being called recursively and stderr or stdout is already being
# redirected, simply call the function and let the enclosing function
# catch the exception
if isinstance(sys.stderr, StdIOBuffer) or isinstance(sys.stdout, StdIOBuffer):
return parse_args(*args, **kwargs)
# if this is not being called recursively, redirect stderr and
# use it as the ArgumentParserError message
old_stdout = sys.stdout
old_stderr = sys.stderr
sys.stdout = StdIOBuffer()
sys.stderr = StdIOBuffer()
try:
try:
result = parse_args(*args, **kwargs)
for key in list(vars(result)):
if getattr(result, key) is sys.stdout:
setattr(result, key, old_stdout)
if getattr(result, key) is sys.stderr:
setattr(result, key, old_stderr)
return result
except SystemExit:
code = sys.exc_info()[1].code
stdout = sys.stdout.getvalue()
stderr = sys.stderr.getvalue()
raise ArgumentParserError("SystemExit", stdout, stderr, code)
finally:
sys.stdout = old_stdout
sys.stderr = old_stderr
class ErrorRaisingArgumentParser(argparse.ArgumentParser):
def parse_args(self, *args, **kwargs):
parse_args = super(ErrorRaisingArgumentParser, self).parse_args
return stderr_to_parser_error(parse_args, *args, **kwargs)
def exit(self, *args, **kwargs):
exit = super(ErrorRaisingArgumentParser, self).exit
return stderr_to_parser_error(exit, *args, **kwargs)
def error(self, *args, **kwargs):
error = super(ErrorRaisingArgumentParser, self).error
return stderr_to_parser_error(error, *args, **kwargs)
class ParserTesterMetaclass(type):
"""Adds parser tests using the class attributes.
Classes of this type should specify the following attributes:
argument_signatures -- a list of Sig objects which specify
the signatures of Argument objects to be created
failures -- a list of args lists that should cause the parser
to fail
successes -- a list of (initial_args, options, remaining_args) tuples
where initial_args specifies the string args to be parsed,
options is a dict that should match the vars() of the options
parsed out of initial_args, and remaining_args should be any
remaining unparsed arguments
"""
def __init__(cls, name, bases, bodydict):
if name == 'ParserTestCase':
return
# default parser signature is empty
if not hasattr(cls, 'parser_signature'):
cls.parser_signature = Sig()
if not hasattr(cls, 'parser_class'):
cls.parser_class = ErrorRaisingArgumentParser
# ---------------------------------------
# functions for adding optional arguments
# ---------------------------------------
def no_groups(parser, argument_signatures):
"""Add all arguments directly to the parser"""
for sig in argument_signatures:
parser.add_argument(*sig.args, **sig.kwargs)
def one_group(parser, argument_signatures):
"""Add all arguments under a single group in the parser"""
group = parser.add_argument_group('foo')
for sig in argument_signatures:
group.add_argument(*sig.args, **sig.kwargs)
def many_groups(parser, argument_signatures):
"""Add each argument in its own group to the parser"""
for i, sig in enumerate(argument_signatures):
group = parser.add_argument_group('foo:%i' % i)
group.add_argument(*sig.args, **sig.kwargs)
# --------------------------
# functions for parsing args
# --------------------------
def listargs(parser, args):
"""Parse the args by passing in a list"""
return parser.parse_args(args)
def sysargs(parser, args):
"""Parse the args by defaulting to sys.argv"""
old_sys_argv = sys.argv
sys.argv = [old_sys_argv[0]] + args
try:
return parser.parse_args()
finally:
sys.argv = old_sys_argv
# class that holds the combination of one optional argument
# addition method and one arg parsing method
class AddTests(object):
def __init__(self, tester_cls, add_arguments, parse_args):
self._add_arguments = add_arguments
self._parse_args = parse_args
add_arguments_name = self._add_arguments.__name__
parse_args_name = self._parse_args.__name__
for test_func in [self.test_failures, self.test_successes]:
func_name = test_func.__name__
names = func_name, add_arguments_name, parse_args_name
test_name = '_'.join(names)
def wrapper(self, test_func=test_func):
test_func(self)
try:
wrapper.__name__ = test_name
except TypeError:
pass
setattr(tester_cls, test_name, wrapper)
def _get_parser(self, tester):
args = tester.parser_signature.args
kwargs = tester.parser_signature.kwargs
parser = tester.parser_class(*args, **kwargs)
self._add_arguments(parser, tester.argument_signatures)
return parser
def test_failures(self, tester):
parser = self._get_parser(tester)
for args_str in tester.failures:
args = args_str.split()
raises = tester.assertRaises
raises(ArgumentParserError, parser.parse_args, args)
def test_successes(self, tester):
parser = self._get_parser(tester)
for args, expected_ns in tester.successes:
if isinstance(args, str):
args = args.split()
result_ns = self._parse_args(parser, args)
tester.assertEqual(expected_ns, result_ns)
# add tests for each combination of an optionals adding method
# and an arg parsing method
for add_arguments in [no_groups, one_group, many_groups]:
for parse_args in [listargs, sysargs]:
AddTests(cls, add_arguments, parse_args)
bases = TestCase,
ParserTestCase = ParserTesterMetaclass('ParserTestCase', bases, {})
# ===============
# Optionals tests
# ===============
class TestOptionalsSingleDash(ParserTestCase):
"""Test an Optional with a single-dash option string"""
argument_signatures = [Sig('-x')]
failures = ['-x', 'a', '--foo', '-x --foo', '-x -y']
successes = [
('', NS(x=None)),
('-x a', NS(x='a')),
('-xa', NS(x='a')),
('-x -1', NS(x='-1')),
('-x-1', NS(x='-1')),
]
class TestOptionalsSingleDashCombined(ParserTestCase):
"""Test an Optional with a single-dash option string"""
argument_signatures = [
Sig('-x', action='store_true'),
Sig('-yyy', action='store_const', const=42),
Sig('-z'),
]
failures = ['a', '--foo', '-xa', '-x --foo', '-x -z', '-z -x',
'-yx', '-yz a', '-yyyx', '-yyyza', '-xyza']
successes = [
('', NS(x=False, yyy=None, z=None)),
('-x', NS(x=True, yyy=None, z=None)),
('-za', NS(x=False, yyy=None, z='a')),
('-z a', NS(x=False, yyy=None, z='a')),
('-xza', NS(x=True, yyy=None, z='a')),
('-xz a', NS(x=True, yyy=None, z='a')),
('-x -za', NS(x=True, yyy=None, z='a')),
('-x -z a', NS(x=True, yyy=None, z='a')),
('-y', NS(x=False, yyy=42, z=None)),
('-yyy', NS(x=False, yyy=42, z=None)),
('-x -yyy -za', NS(x=True, yyy=42, z='a')),
('-x -yyy -z a', NS(x=True, yyy=42, z='a')),
]
class TestOptionalsSingleDashLong(ParserTestCase):
"""Test an Optional with a multi-character single-dash option string"""
argument_signatures = [Sig('-foo')]
failures = ['-foo', 'a', '--foo', '-foo --foo', '-foo -y', '-fooa']
successes = [
('', NS(foo=None)),
('-foo a', NS(foo='a')),
('-foo -1', NS(foo='-1')),
('-fo a', NS(foo='a')),
('-f a', NS(foo='a')),
]
class TestOptionalsSingleDashSubsetAmbiguous(ParserTestCase):
"""Test Optionals where option strings are subsets of each other"""
argument_signatures = [Sig('-f'), Sig('-foobar'), Sig('-foorab')]
failures = ['-f', '-foo', '-fo', '-foo b', '-foob', '-fooba', '-foora']
successes = [
('', NS(f=None, foobar=None, foorab=None)),
('-f a', NS(f='a', foobar=None, foorab=None)),
('-fa', NS(f='a', foobar=None, foorab=None)),
('-foa', NS(f='oa', foobar=None, foorab=None)),
('-fooa', NS(f='ooa', foobar=None, foorab=None)),
('-foobar a', NS(f=None, foobar='a', foorab=None)),
('-foorab a', NS(f=None, foobar=None, foorab='a')),
]
class TestOptionalsSingleDashAmbiguous(ParserTestCase):
"""Test Optionals that partially match but are not subsets"""
argument_signatures = [Sig('-foobar'), Sig('-foorab')]
failures = ['-f', '-f a', '-fa', '-foa', '-foo', '-fo', '-foo b']
successes = [
('', NS(foobar=None, foorab=None)),
('-foob a', NS(foobar='a', foorab=None)),
('-foor a', NS(foobar=None, foorab='a')),
('-fooba a', NS(foobar='a', foorab=None)),
('-foora a', NS(foobar=None, foorab='a')),
('-foobar a', NS(foobar='a', foorab=None)),
('-foorab a', NS(foobar=None, foorab='a')),
]
class TestOptionalsNumeric(ParserTestCase):
"""Test an Optional with a short opt string"""
argument_signatures = [Sig('-1', dest='one')]
failures = ['-1', 'a', '-1 --foo', '-1 -y', '-1 -1', '-1 -2']
successes = [
('', NS(one=None)),
('-1 a', NS(one='a')),
('-1a', NS(one='a')),
('-1-2', NS(one='-2')),
]
class TestOptionalsDoubleDash(ParserTestCase):
"""Test an Optional with a double-dash option string"""
argument_signatures = [Sig('--foo')]
failures = ['--foo', '-f', '-f a', 'a', '--foo -x', '--foo --bar']
successes = [
('', NS(foo=None)),
('--foo a', NS(foo='a')),
('--foo=a', NS(foo='a')),
('--foo -2.5', NS(foo='-2.5')),
('--foo=-2.5', NS(foo='-2.5')),
]
class TestOptionalsDoubleDashPartialMatch(ParserTestCase):
"""Tests partial matching with a double-dash option string"""
argument_signatures = [
Sig('--badger', action='store_true'),
Sig('--bat'),
]
failures = ['--bar', '--b', '--ba', '--b=2', '--ba=4', '--badge 5']
successes = [
('', NS(badger=False, bat=None)),
('--bat X', NS(badger=False, bat='X')),
('--bad', NS(badger=True, bat=None)),
('--badg', NS(badger=True, bat=None)),
('--badge', NS(badger=True, bat=None)),
('--badger', NS(badger=True, bat=None)),
]
class TestOptionalsDoubleDashPrefixMatch(ParserTestCase):
"""Tests when one double-dash option string is a prefix of another"""
argument_signatures = [
Sig('--badger', action='store_true'),
Sig('--ba'),
]
failures = ['--bar', '--b', '--ba', '--b=2', '--badge 5']
successes = [
('', NS(badger=False, ba=None)),
('--ba X', NS(badger=False, ba='X')),
('--ba=X', NS(badger=False, ba='X')),
('--bad', NS(badger=True, ba=None)),
('--badg', NS(badger=True, ba=None)),
('--badge', NS(badger=True, ba=None)),
('--badger', NS(badger=True, ba=None)),
]
class TestOptionalsSingleDoubleDash(ParserTestCase):
"""Test an Optional with single- and double-dash option strings"""
argument_signatures = [
Sig('-f', action='store_true'),
Sig('--bar'),
Sig('-baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-fbaz', '-bazf', '-b B', 'B']
successes = [
('', NS(f=False, bar=None, baz=None)),
('-f', NS(f=True, bar=None, baz=None)),
('--ba B', NS(f=False, bar='B', baz=None)),
('-f --bar B', NS(f=True, bar='B', baz=None)),
('-f -b', NS(f=True, bar=None, baz=42)),
('-ba -f', NS(f=True, bar=None, baz=42)),
]
class TestOptionalsAlternatePrefixChars(ParserTestCase):
"""Test an Optional with option strings with custom prefixes"""
parser_signature = Sig(prefix_chars='+:/', add_help=False)
argument_signatures = [
Sig('+f', action='store_true'),
Sig('::bar'),
Sig('/baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-b B', 'B', '-f', '--bar B', '-baz', '-h', '--help', '+h', '::help', '/help']
successes = [
('', NS(f=False, bar=None, baz=None)),
('+f', NS(f=True, bar=None, baz=None)),
('::ba B', NS(f=False, bar='B', baz=None)),
('+f ::bar B', NS(f=True, bar='B', baz=None)),
('+f /b', NS(f=True, bar=None, baz=42)),
('/ba +f', NS(f=True, bar=None, baz=42)),
]
class TestOptionalsAlternatePrefixCharsAddedHelp(ParserTestCase):
"""When ``-`` not in prefix_chars, default operators created for help
should use the prefix_chars in use rather than - or --
http://bugs.python.org/issue9444"""
parser_signature = Sig(prefix_chars='+:/', add_help=True)
argument_signatures = [
Sig('+f', action='store_true'),
Sig('::bar'),
Sig('/baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-b B', 'B', '-f', '--bar B', '-baz']
successes = [
('', NS(f=False, bar=None, baz=None)),
('+f', NS(f=True, bar=None, baz=None)),
('::ba B', NS(f=False, bar='B', baz=None)),
('+f ::bar B', NS(f=True, bar='B', baz=None)),
('+f /b', NS(f=True, bar=None, baz=42)),
('/ba +f', NS(f=True, bar=None, baz=42))
]
class TestOptionalsAlternatePrefixCharsMultipleShortArgs(ParserTestCase):
"""Verify that Optionals must be called with their defined prefixes"""
parser_signature = Sig(prefix_chars='+-', add_help=False)
argument_signatures = [
Sig('-x', action='store_true'),
Sig('+y', action='store_true'),
Sig('+z', action='store_true'),
]
failures = ['-w',
'-xyz',
'+x',
'-y',
'+xyz',
]
successes = [
('', NS(x=False, y=False, z=False)),
('-x', NS(x=True, y=False, z=False)),
('+y -x', NS(x=True, y=True, z=False)),
('+yz -x', NS(x=True, y=True, z=True)),
]
class TestOptionalsShortLong(ParserTestCase):
"""Test a combination of single- and double-dash option strings"""
argument_signatures = [
Sig('-v', '--verbose', '-n', '--noisy', action='store_true'),
]
failures = ['--x --verbose', '-N', 'a', '-v x']
successes = [
('', NS(verbose=False)),
('-v', NS(verbose=True)),
('--verbose', NS(verbose=True)),
('-n', NS(verbose=True)),
('--noisy', NS(verbose=True)),
]
class TestOptionalsDest(ParserTestCase):
"""Tests various means of setting destination"""
argument_signatures = [Sig('--foo-bar'), Sig('--baz', dest='zabbaz')]
failures = ['a']
successes = [
('--foo-bar f', NS(foo_bar='f', zabbaz=None)),
('--baz g', NS(foo_bar=None, zabbaz='g')),
('--foo-bar h --baz i', NS(foo_bar='h', zabbaz='i')),
('--baz j --foo-bar k', NS(foo_bar='k', zabbaz='j')),
]
class TestOptionalsDefault(ParserTestCase):
"""Tests specifying a default for an Optional"""
argument_signatures = [Sig('-x'), Sig('-y', default=42)]
failures = ['a']
successes = [
('', NS(x=None, y=42)),
('-xx', NS(x='x', y=42)),
('-yy', NS(x=None, y='y')),
]
class TestOptionalsNargsDefault(ParserTestCase):
"""Tests not specifying the number of args for an Optional"""
argument_signatures = [Sig('-x')]
failures = ['a', '-x']
successes = [
('', NS(x=None)),
('-x a', NS(x='a')),
]
class TestOptionalsNargs1(ParserTestCase):
"""Tests specifying the 1 arg for an Optional"""
argument_signatures = [Sig('-x', nargs=1)]
failures = ['a', '-x']
successes = [
('', NS(x=None)),
('-x a', NS(x=['a'])),
]
class TestOptionalsNargs3(ParserTestCase):
"""Tests specifying the 3 args for an Optional"""
argument_signatures = [Sig('-x', nargs=3)]
failures = ['a', '-x', '-x a', '-x a b', 'a -x', 'a -x b']
successes = [
('', NS(x=None)),
('-x a b c', NS(x=['a', 'b', 'c'])),
]
class TestOptionalsNargsOptional(ParserTestCase):
"""Tests specifying an Optional arg for an Optional"""
argument_signatures = [
Sig('-w', nargs='?'),
Sig('-x', nargs='?', const=42),
Sig('-y', nargs='?', default='spam'),
Sig('-z', nargs='?', type=int, const='42', default='84'),
]
failures = ['2']
successes = [
('', NS(w=None, x=None, y='spam', z=84)),
('-w', NS(w=None, x=None, y='spam', z=84)),
('-w 2', NS(w='2', x=None, y='spam', z=84)),
('-x', NS(w=None, x=42, y='spam', z=84)),
('-x 2', NS(w=None, x='2', y='spam', z=84)),
('-y', NS(w=None, x=None, y=None, z=84)),
('-y 2', NS(w=None, x=None, y='2', z=84)),
('-z', NS(w=None, x=None, y='spam', z=42)),
('-z 2', NS(w=None, x=None, y='spam', z=2)),
]
class TestOptionalsNargsZeroOrMore(ParserTestCase):
"""Tests specifying an args for an Optional that accepts zero or more"""
argument_signatures = [
Sig('-x', nargs='*'),
Sig('-y', nargs='*', default='spam'),
]
failures = ['a']
successes = [
('', NS(x=None, y='spam')),
('-x', NS(x=[], y='spam')),
('-x a', NS(x=['a'], y='spam')),
('-x a b', NS(x=['a', 'b'], y='spam')),
('-y', NS(x=None, y=[])),
('-y a', NS(x=None, y=['a'])),
('-y a b', NS(x=None, y=['a', 'b'])),
]
class TestOptionalsNargsOneOrMore(ParserTestCase):
"""Tests specifying an args for an Optional that accepts one or more"""
argument_signatures = [
Sig('-x', nargs='+'),
Sig('-y', nargs='+', default='spam'),
]
failures = ['a', '-x', '-y', 'a -x', 'a -y b']
successes = [
('', NS(x=None, y='spam')),
('-x a', NS(x=['a'], y='spam')),
('-x a b', NS(x=['a', 'b'], y='spam')),
('-y a', NS(x=None, y=['a'])),
('-y a b', NS(x=None, y=['a', 'b'])),
]
class TestOptionalsChoices(ParserTestCase):
"""Tests specifying the choices for an Optional"""
argument_signatures = [
Sig('-f', choices='abc'),
Sig('-g', type=int, choices=range(5))]
failures = ['a', '-f d', '-fad', '-ga', '-g 6']
successes = [
('', NS(f=None, g=None)),
('-f a', NS(f='a', g=None)),
('-f c', NS(f='c', g=None)),
('-g 0', NS(f=None, g=0)),
('-g 03', NS(f=None, g=3)),
('-fb -g4', NS(f='b', g=4)),
]
class TestOptionalsRequired(ParserTestCase):
"""Tests the an optional action that is required"""
argument_signatures = [
Sig('-x', type=int, required=True),
]
failures = ['a', '']
successes = [
('-x 1', NS(x=1)),
('-x42', NS(x=42)),
]
class TestOptionalsActionStore(ParserTestCase):
"""Tests the store action for an Optional"""
argument_signatures = [Sig('-x', action='store')]
failures = ['a', 'a -x']
successes = [
('', NS(x=None)),
('-xfoo', NS(x='foo')),
]
class TestOptionalsActionStoreConst(ParserTestCase):
"""Tests the store_const action for an Optional"""
argument_signatures = [Sig('-y', action='store_const', const=object)]
failures = ['a']
successes = [
('', NS(y=None)),
('-y', NS(y=object)),
]
class TestOptionalsActionStoreFalse(ParserTestCase):
"""Tests the store_false action for an Optional"""
argument_signatures = [Sig('-z', action='store_false')]
failures = ['a', '-za', '-z a']
successes = [
('', NS(z=True)),
('-z', NS(z=False)),
]
class TestOptionalsActionStoreTrue(ParserTestCase):
"""Tests the store_true action for an Optional"""
argument_signatures = [Sig('--apple', action='store_true')]
failures = ['a', '--apple=b', '--apple b']
successes = [
('', NS(apple=False)),
('--apple', NS(apple=True)),
]
class TestOptionalsActionAppend(ParserTestCase):
"""Tests the append action for an Optional"""
argument_signatures = [Sig('--baz', action='append')]
failures = ['a', '--baz', 'a --baz', '--baz a b']
successes = [
('', NS(baz=None)),
('--baz a', NS(baz=['a'])),
('--baz a --baz b', NS(baz=['a', 'b'])),
]
class TestOptionalsActionAppendWithDefault(ParserTestCase):
"""Tests the append action for an Optional"""
argument_signatures = [Sig('--baz', action='append', default=['X'])]
failures = ['a', '--baz', 'a --baz', '--baz a b']
successes = [
('', NS(baz=['X'])),
('--baz a', NS(baz=['X', 'a'])),
('--baz a --baz b', NS(baz=['X', 'a', 'b'])),
]
class TestOptionalsActionAppendConst(ParserTestCase):
"""Tests the append_const action for an Optional"""
argument_signatures = [
Sig('-b', action='append_const', const=Exception),
Sig('-c', action='append', dest='b'),
]
failures = ['a', '-c', 'a -c', '-bx', '-b x']
successes = [
('', NS(b=None)),
('-b', NS(b=[Exception])),
('-b -cx -b -cyz', NS(b=[Exception, 'x', Exception, 'yz'])),
]
class TestOptionalsActionAppendConstWithDefault(ParserTestCase):
"""Tests the append_const action for an Optional"""
argument_signatures = [
Sig('-b', action='append_const', const=Exception, default=['X']),
Sig('-c', action='append', dest='b'),
]
failures = ['a', '-c', 'a -c', '-bx', '-b x']
successes = [
('', NS(b=['X'])),
('-b', NS(b=['X', Exception])),
('-b -cx -b -cyz', NS(b=['X', Exception, 'x', Exception, 'yz'])),
]
class TestOptionalsActionCount(ParserTestCase):
"""Tests the count action for an Optional"""
argument_signatures = [Sig('-x', action='count')]
failures = ['a', '-x a', '-x b', '-x a -x b']
successes = [
('', NS(x=None)),
('-x', NS(x=1)),
]
# ================
# Positional tests
# ================
class TestPositionalsNargsNone(ParserTestCase):
"""Test a Positional that doesn't specify nargs"""
argument_signatures = [Sig('foo')]
failures = ['', '-x', 'a b']
successes = [
('a', NS(foo='a')),
]
class TestPositionalsNargs1(ParserTestCase):
"""Test a Positional that specifies an nargs of 1"""
argument_signatures = [Sig('foo', nargs=1)]
failures = ['', '-x', 'a b']
successes = [
('a', NS(foo=['a'])),
]
class TestPositionalsNargs2(ParserTestCase):
"""Test a Positional that specifies an nargs of 2"""
argument_signatures = [Sig('foo', nargs=2)]
failures = ['', 'a', '-x', 'a b c']
successes = [
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsZeroOrMore(ParserTestCase):
"""Test a Positional that specifies unlimited nargs"""
argument_signatures = [Sig('foo', nargs='*')]
failures = ['-x']
successes = [
('', NS(foo=[])),
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsZeroOrMoreDefault(ParserTestCase):
"""Test a Positional that specifies unlimited nargs and a default"""
argument_signatures = [Sig('foo', nargs='*', default='bar')]
failures = ['-x']
successes = [
('', NS(foo='bar')),
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsOneOrMore(ParserTestCase):
"""Test a Positional that specifies one or more nargs"""
argument_signatures = [Sig('foo', nargs='+')]
failures = ['', '-x']
successes = [
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsOptional(ParserTestCase):
"""Tests an Optional Positional"""
argument_signatures = [Sig('foo', nargs='?')]
failures = ['-x', 'a b']
successes = [
('', NS(foo=None)),
('a', NS(foo='a')),
]
class TestPositionalsNargsOptionalDefault(ParserTestCase):
"""Tests an Optional Positional with a default value"""
argument_signatures = [Sig('foo', nargs='?', default=42)]
failures = ['-x', 'a b']
successes = [
('', NS(foo=42)),
('a', NS(foo='a')),
]
class TestPositionalsNargsOptionalConvertedDefault(ParserTestCase):
"""Tests an Optional Positional with a default value
that needs to be converted to the appropriate type.
"""
argument_signatures = [
Sig('foo', nargs='?', type=int, default='42'),
]
failures = ['-x', 'a b', '1 2']
successes = [
('', NS(foo=42)),
('1', NS(foo=1)),
]
class TestPositionalsNargsNoneNone(ParserTestCase):
"""Test two Positionals that don't specify nargs"""
argument_signatures = [Sig('foo'), Sig('bar')]
failures = ['', '-x', 'a', 'a b c']
successes = [
('a b', NS(foo='a', bar='b')),
]
class TestPositionalsNargsNone1(ParserTestCase):
"""Test a Positional with no nargs followed by one with 1"""
argument_signatures = [Sig('foo'), Sig('bar', nargs=1)]
failures = ['', '--foo', 'a', 'a b c']
successes = [
('a b', NS(foo='a', bar=['b'])),
]
class TestPositionalsNargs2None(ParserTestCase):
"""Test a Positional with 2 nargs followed by one with none"""
argument_signatures = [Sig('foo', nargs=2), Sig('bar')]
failures = ['', '--foo', 'a', 'a b', 'a b c d']
successes = [
('a b c', NS(foo=['a', 'b'], bar='c')),
]
class TestPositionalsNargsNoneZeroOrMore(ParserTestCase):
"""Test a Positional with no nargs followed by one with unlimited"""
argument_signatures = [Sig('foo'), Sig('bar', nargs='*')]
failures = ['', '--foo']
successes = [
('a', NS(foo='a', bar=[])),
('a b', NS(foo='a', bar=['b'])),
('a b c', NS(foo='a', bar=['b', 'c'])),
]
class TestPositionalsNargsNoneOneOrMore(ParserTestCase):
"""Test a Positional with no nargs followed by one with one or more"""
argument_signatures = [Sig('foo'), Sig('bar', nargs='+')]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo='a', bar=['b'])),
('a b c', NS(foo='a', bar=['b', 'c'])),
]
class TestPositionalsNargsNoneOptional(ParserTestCase):
"""Test a Positional with no nargs followed by one with an Optional"""
argument_signatures = [Sig('foo'), Sig('bar', nargs='?')]
failures = ['', '--foo', 'a b c']
successes = [
('a', NS(foo='a', bar=None)),
('a b', NS(foo='a', bar='b')),
]
class TestPositionalsNargsZeroOrMoreNone(ParserTestCase):
"""Test a Positional with unlimited nargs followed by one with none"""
argument_signatures = [Sig('foo', nargs='*'), Sig('bar')]
failures = ['', '--foo']
successes = [
('a', NS(foo=[], bar='a')),
('a b', NS(foo=['a'], bar='b')),
('a b c', NS(foo=['a', 'b'], bar='c')),
]
class TestPositionalsNargsOneOrMoreNone(ParserTestCase):
"""Test a Positional with one or more nargs followed by one with none"""
argument_signatures = [Sig('foo', nargs='+'), Sig('bar')]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo=['a'], bar='b')),
('a b c', NS(foo=['a', 'b'], bar='c')),
]
class TestPositionalsNargsOptionalNone(ParserTestCase):
"""Test a Positional with an Optional nargs followed by one with none"""
argument_signatures = [Sig('foo', nargs='?', default=42), Sig('bar')]
failures = ['', '--foo', 'a b c']
successes = [
('a', NS(foo=42, bar='a')),
('a b', NS(foo='a', bar='b')),
]
class TestPositionalsNargs2ZeroOrMore(ParserTestCase):
"""Test a Positional with 2 nargs followed by one with unlimited"""
argument_signatures = [Sig('foo', nargs=2), Sig('bar', nargs='*')]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo=['a', 'b'], bar=[])),
('a b c', NS(foo=['a', 'b'], bar=['c'])),
]
class TestPositionalsNargs2OneOrMore(ParserTestCase):
"""Test a Positional with 2 nargs followed by one with one or more"""
argument_signatures = [Sig('foo', nargs=2), Sig('bar', nargs='+')]
failures = ['', '--foo', 'a', 'a b']
successes = [
('a b c', NS(foo=['a', 'b'], bar=['c'])),
]
class TestPositionalsNargs2Optional(ParserTestCase):
"""Test a Positional with 2 nargs followed by one optional"""
argument_signatures = [Sig('foo', nargs=2), Sig('bar', nargs='?')]
failures = ['', '--foo', 'a', 'a b c d']
successes = [
('a b', NS(foo=['a', 'b'], bar=None)),
('a b c', NS(foo=['a', 'b'], bar='c')),
]
class TestPositionalsNargsZeroOrMore1(ParserTestCase):
"""Test a Positional with unlimited nargs followed by one with 1"""
argument_signatures = [Sig('foo', nargs='*'), Sig('bar', nargs=1)]
failures = ['', '--foo', ]
successes = [
('a', NS(foo=[], bar=['a'])),
('a b', NS(foo=['a'], bar=['b'])),
('a b c', NS(foo=['a', 'b'], bar=['c'])),
]
class TestPositionalsNargsOneOrMore1(ParserTestCase):
"""Test a Positional with one or more nargs followed by one with 1"""
argument_signatures = [Sig('foo', nargs='+'), Sig('bar', nargs=1)]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo=['a'], bar=['b'])),
('a b c', NS(foo=['a', 'b'], bar=['c'])),
]
class TestPositionalsNargsOptional1(ParserTestCase):
"""Test a Positional with an Optional nargs followed by one with 1"""
argument_signatures = [Sig('foo', nargs='?'), Sig('bar', nargs=1)]
failures = ['', '--foo', 'a b c']
successes = [
('a', NS(foo=None, bar=['a'])),
('a b', NS(foo='a', bar=['b'])),
]
class TestPositionalsNargsNoneZeroOrMore1(ParserTestCase):
"""Test three Positionals: no nargs, unlimited nargs and 1 nargs"""
argument_signatures = [
Sig('foo'),
Sig('bar', nargs='*'),
Sig('baz', nargs=1),
]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo='a', bar=[], baz=['b'])),
('a b c', NS(foo='a', bar=['b'], baz=['c'])),
]
class TestPositionalsNargsNoneOneOrMore1(ParserTestCase):
"""Test three Positionals: no nargs, one or more nargs and 1 nargs"""
argument_signatures = [
Sig('foo'),
Sig('bar', nargs='+'),
Sig('baz', nargs=1),
]
failures = ['', '--foo', 'a', 'b']
successes = [
('a b c', NS(foo='a', bar=['b'], baz=['c'])),
('a b c d', NS(foo='a', bar=['b', 'c'], baz=['d'])),
]
class TestPositionalsNargsNoneOptional1(ParserTestCase):
"""Test three Positionals: no nargs, optional narg and 1 nargs"""
argument_signatures = [
Sig('foo'),
Sig('bar', nargs='?', default=0.625),
Sig('baz', nargs=1),
]
failures = ['', '--foo', 'a']
successes = [
('a b', NS(foo='a', bar=0.625, baz=['b'])),
('a b c', NS(foo='a', bar='b', baz=['c'])),
]
class TestPositionalsNargsOptionalOptional(ParserTestCase):
"""Test two optional nargs"""
argument_signatures = [
Sig('foo', nargs='?'),
Sig('bar', nargs='?', default=42),
]
failures = ['--foo', 'a b c']
successes = [
('', NS(foo=None, bar=42)),
('a', NS(foo='a', bar=42)),
('a b', NS(foo='a', bar='b')),
]
class TestPositionalsNargsOptionalZeroOrMore(ParserTestCase):
"""Test an Optional narg followed by unlimited nargs"""
argument_signatures = [Sig('foo', nargs='?'), Sig('bar', nargs='*')]
failures = ['--foo']
successes = [
('', NS(foo=None, bar=[])),
('a', NS(foo='a', bar=[])),
('a b', NS(foo='a', bar=['b'])),
('a b c', NS(foo='a', bar=['b', 'c'])),
]
class TestPositionalsNargsOptionalOneOrMore(ParserTestCase):
"""Test an Optional narg followed by one or more nargs"""
argument_signatures = [Sig('foo', nargs='?'), Sig('bar', nargs='+')]
failures = ['', '--foo']
successes = [
('a', NS(foo=None, bar=['a'])),
('a b', NS(foo='a', bar=['b'])),
('a b c', NS(foo='a', bar=['b', 'c'])),
]
class TestPositionalsChoicesString(ParserTestCase):
"""Test a set of single-character choices"""
argument_signatures = [Sig('spam', choices=set('abcdefg'))]
failures = ['', '--foo', 'h', '42', 'ef']
successes = [
('a', NS(spam='a')),
('g', NS(spam='g')),
]
class TestPositionalsChoicesInt(ParserTestCase):
"""Test a set of integer choices"""
argument_signatures = [Sig('spam', type=int, choices=range(20))]
failures = ['', '--foo', 'h', '42', 'ef']
successes = [
('4', NS(spam=4)),
('15', NS(spam=15)),
]
class TestPositionalsActionAppend(ParserTestCase):
"""Test the 'append' action"""
argument_signatures = [
Sig('spam', action='append'),
Sig('spam', action='append', nargs=2),
]
failures = ['', '--foo', 'a', 'a b', 'a b c d']
successes = [
('a b c', NS(spam=['a', ['b', 'c']])),
]
# ========================================
# Combined optionals and positionals tests
# ========================================
class TestOptionalsNumericAndPositionals(ParserTestCase):
"""Tests negative number args when numeric options are present"""
argument_signatures = [
Sig('x', nargs='?'),
Sig('-4', dest='y', action='store_true'),
]
failures = ['-2', '-315']
successes = [
('', NS(x=None, y=False)),
('a', NS(x='a', y=False)),
('-4', NS(x=None, y=True)),
('-4 a', NS(x='a', y=True)),
]
class TestOptionalsAlmostNumericAndPositionals(ParserTestCase):
"""Tests negative number args when almost numeric options are present"""
argument_signatures = [
Sig('x', nargs='?'),
Sig('-k4', dest='y', action='store_true'),
]
failures = ['-k3']
successes = [
('', NS(x=None, y=False)),
('-2', NS(x='-2', y=False)),
('a', NS(x='a', y=False)),
('-k4', NS(x=None, y=True)),
('-k4 a', NS(x='a', y=True)),
]
class TestEmptyAndSpaceContainingArguments(ParserTestCase):
argument_signatures = [
Sig('x', nargs='?'),
Sig('-y', '--yyy', dest='y'),
]
failures = ['-y']
successes = [
([''], NS(x='', y=None)),
(['a badger'], NS(x='a badger', y=None)),
(['-a badger'], NS(x='-a badger', y=None)),
(['-y', ''], NS(x=None, y='')),
(['-y', 'a badger'], NS(x=None, y='a badger')),
(['-y', '-a badger'], NS(x=None, y='-a badger')),
(['--yyy=a badger'], NS(x=None, y='a badger')),
(['--yyy=-a badger'], NS(x=None, y='-a badger')),
]
class TestPrefixCharacterOnlyArguments(ParserTestCase):
parser_signature = Sig(prefix_chars='-+')
argument_signatures = [
Sig('-', dest='x', nargs='?', const='badger'),
Sig('+', dest='y', type=int, default=42),
Sig('-+-', dest='z', action='store_true'),
]
failures = ['-y', '+ -']
successes = [
('', NS(x=None, y=42, z=False)),
('-', NS(x='badger', y=42, z=False)),
('- X', NS(x='X', y=42, z=False)),
('+ -3', NS(x=None, y=-3, z=False)),
('-+-', NS(x=None, y=42, z=True)),
('- ===', NS(x='===', y=42, z=False)),
]
class TestNargsZeroOrMore(ParserTestCase):
"""Tests specifying an args for an Optional that accepts zero or more"""
argument_signatures = [Sig('-x', nargs='*'), Sig('y', nargs='*')]
failures = []
successes = [
('', NS(x=None, y=[])),
('-x', NS(x=[], y=[])),
('-x a', NS(x=['a'], y=[])),
('-x a -- b', NS(x=['a'], y=['b'])),
('a', NS(x=None, y=['a'])),
('a -x', NS(x=[], y=['a'])),
('a -x b', NS(x=['b'], y=['a'])),
]
class TestNargsRemainder(ParserTestCase):
"""Tests specifying a positional with nargs=REMAINDER"""
argument_signatures = [Sig('x'), Sig('y', nargs='...'), Sig('-z')]
failures = ['', '-z', '-z Z']
successes = [
('X', NS(x='X', y=[], z=None)),
('-z Z X', NS(x='X', y=[], z='Z')),
('X A B -z Z', NS(x='X', y=['A', 'B', '-z', 'Z'], z=None)),
('X Y --foo', NS(x='X', y=['Y', '--foo'], z=None)),
]
class TestOptionLike(ParserTestCase):
"""Tests options that may or may not be arguments"""
argument_signatures = [
Sig('-x', type=float),
Sig('-3', type=float, dest='y'),
Sig('z', nargs='*'),
]
failures = ['-x', '-y2.5', '-xa', '-x -a',
'-x -3', '-x -3.5', '-3 -3.5',
'-x -2.5', '-x -2.5 a', '-3 -.5',
'a x -1', '-x -1 a', '-3 -1 a']
successes = [
('', NS(x=None, y=None, z=[])),
('-x 2.5', NS(x=2.5, y=None, z=[])),
('-x 2.5 a', NS(x=2.5, y=None, z=['a'])),
('-3.5', NS(x=None, y=0.5, z=[])),
('-3-.5', NS(x=None, y=-0.5, z=[])),
('-3 .5', NS(x=None, y=0.5, z=[])),
('a -3.5', NS(x=None, y=0.5, z=['a'])),
('a', NS(x=None, y=None, z=['a'])),
('a -x 1', NS(x=1.0, y=None, z=['a'])),
('-x 1 a', NS(x=1.0, y=None, z=['a'])),
('-3 1 a', NS(x=None, y=1.0, z=['a'])),
]
class TestDefaultSuppress(ParserTestCase):
"""Test actions with suppressed defaults"""
argument_signatures = [
Sig('foo', nargs='?', default=argparse.SUPPRESS),
Sig('bar', nargs='*', default=argparse.SUPPRESS),
Sig('--baz', action='store_true', default=argparse.SUPPRESS),
]
failures = ['-x']
successes = [
('', NS()),
('a', NS(foo='a')),
('a b', NS(foo='a', bar=['b'])),
('--baz', NS(baz=True)),
('a --baz', NS(foo='a', baz=True)),
('--baz a b', NS(foo='a', bar=['b'], baz=True)),
]
class TestParserDefaultSuppress(ParserTestCase):
"""Test actions with a parser-level default of SUPPRESS"""
parser_signature = Sig(argument_default=argparse.SUPPRESS)
argument_signatures = [
Sig('foo', nargs='?'),
Sig('bar', nargs='*'),
Sig('--baz', action='store_true'),
]
failures = ['-x']
successes = [
('', NS()),
('a', NS(foo='a')),
('a b', NS(foo='a', bar=['b'])),
('--baz', NS(baz=True)),
('a --baz', NS(foo='a', baz=True)),
('--baz a b', NS(foo='a', bar=['b'], baz=True)),
]
class TestParserDefault42(ParserTestCase):
"""Test actions with a parser-level default of 42"""
parser_signature = Sig(argument_default=42, version='1.0')
argument_signatures = [
Sig('foo', nargs='?'),
Sig('bar', nargs='*'),
Sig('--baz', action='store_true'),
]
failures = ['-x']
successes = [
('', NS(foo=42, bar=42, baz=42)),
('a', NS(foo='a', bar=42, baz=42)),
('a b', NS(foo='a', bar=['b'], baz=42)),
('--baz', NS(foo=42, bar=42, baz=True)),
('a --baz', NS(foo='a', bar=42, baz=True)),
('--baz a b', NS(foo='a', bar=['b'], baz=True)),
]
class TestArgumentsFromFile(TempDirMixin, ParserTestCase):
"""Test reading arguments from a file"""
def setUp(self):
super(TestArgumentsFromFile, self).setUp()
file_texts = [
('hello', 'hello world!\n'),
('recursive', '-a\n'
'A\n'
'@hello'),
('invalid', '@no-such-path\n'),
]
for path, text in file_texts:
file = open(path, 'w')
file.write(text)
file.close()
parser_signature = Sig(fromfile_prefix_chars='@')
argument_signatures = [
Sig('-a'),
Sig('x'),
Sig('y', nargs='+'),
]
failures = ['', '-b', 'X', '@invalid', '@missing']
successes = [
('X Y', NS(a=None, x='X', y=['Y'])),
('X -a A Y Z', NS(a='A', x='X', y=['Y', 'Z'])),
('@hello X', NS(a=None, x='hello world!', y=['X'])),
('X @hello', NS(a=None, x='X', y=['hello world!'])),
('-a B @recursive Y Z', NS(a='A', x='hello world!', y=['Y', 'Z'])),
('X @recursive Z -a B', NS(a='B', x='X', y=['hello world!', 'Z'])),
(["-a", "", "X", "Y"], NS(a='', x='X', y=['Y'])),
]
class TestArgumentsFromFileConverter(TempDirMixin, ParserTestCase):
"""Test reading arguments from a file"""
def setUp(self):
super(TestArgumentsFromFileConverter, self).setUp()
file_texts = [
('hello', 'hello world!\n'),
]
for path, text in file_texts:
file = open(path, 'w')
file.write(text)
file.close()
class FromFileConverterArgumentParser(ErrorRaisingArgumentParser):
def convert_arg_line_to_args(self, arg_line):
for arg in arg_line.split():
if not arg.strip():
continue
yield arg
parser_class = FromFileConverterArgumentParser
parser_signature = Sig(fromfile_prefix_chars='@')
argument_signatures = [
Sig('y', nargs='+'),
]
failures = []
successes = [
('@hello X', NS(y=['hello', 'world!', 'X'])),
]
# =====================
# Type conversion tests
# =====================
class TestFileTypeRepr(TestCase):
def test_r(self):
type = argparse.FileType('r')
self.assertEqual("FileType('r')", repr(type))
def test_wb_1(self):
type = argparse.FileType('wb', 1)
self.assertEqual("FileType('wb', 1)", repr(type))
class RFile(object):
seen = {}
def __init__(self, name):
self.name = name
def __eq__(self, other):
if other in self.seen:
text = self.seen[other]
else:
text = self.seen[other] = other.read()
other.close()
if not isinstance(text, str):
text = text.decode('ascii')
return self.name == other.name == text
class TestFileTypeR(TempDirMixin, ParserTestCase):
"""Test the FileType option/argument type for reading files"""
def setUp(self):
super(TestFileTypeR, self).setUp()
for file_name in ['foo', 'bar']:
file = open(os.path.join(self.temp_dir, file_name), 'w')
file.write(file_name)
file.close()
self.create_readonly_file('readonly')
argument_signatures = [
Sig('-x', type=argparse.FileType()),
Sig('spam', type=argparse.FileType('r')),
]
failures = ['-x', '', 'non-existent-file.txt']
successes = [
('foo', NS(x=None, spam=RFile('foo'))),
('-x foo bar', NS(x=RFile('foo'), spam=RFile('bar'))),
('bar -x foo', NS(x=RFile('foo'), spam=RFile('bar'))),
('-x - -', NS(x=sys.stdin, spam=sys.stdin)),
('readonly', NS(x=None, spam=RFile('readonly'))),
]
class TestFileTypeDefaults(TempDirMixin, ParserTestCase):
"""Test that a file is not created unless the default is needed"""
def setUp(self):
super(TestFileTypeDefaults, self).setUp()
file = open(os.path.join(self.temp_dir, 'good'), 'w')
file.write('good')
file.close()
argument_signatures = [
Sig('-c', type=argparse.FileType('r'), default='no-file.txt'),
]
# should provoke no such file error
failures = ['']
# should not provoke error because default file is created
successes = [('-c good', NS(c=RFile('good')))]
class TestFileTypeRB(TempDirMixin, ParserTestCase):
"""Test the FileType option/argument type for reading files"""
def setUp(self):
super(TestFileTypeRB, self).setUp()
for file_name in ['foo', 'bar']:
file = open(os.path.join(self.temp_dir, file_name), 'w')
file.write(file_name)
file.close()
argument_signatures = [
Sig('-x', type=argparse.FileType('rb')),
Sig('spam', type=argparse.FileType('rb')),
]
failures = ['-x', '']
successes = [
('foo', NS(x=None, spam=RFile('foo'))),
('-x foo bar', NS(x=RFile('foo'), spam=RFile('bar'))),
('bar -x foo', NS(x=RFile('foo'), spam=RFile('bar'))),
('-x - -', NS(x=sys.stdin, spam=sys.stdin)),
]
class WFile(object):
seen = set()
def __init__(self, name):
self.name = name
def __eq__(self, other):
if other not in self.seen:
text = 'Check that file is writable.'
if 'b' in other.mode:
text = text.encode('ascii')
other.write(text)
other.close()
self.seen.add(other)
return self.name == other.name
@unittest.skipIf(hasattr(os, 'geteuid') and os.geteuid() == 0,
"non-root user required")
class TestFileTypeW(TempDirMixin, ParserTestCase):
"""Test the FileType option/argument type for writing files"""
def setUp(self):
super(TestFileTypeW, self).setUp()
self.create_readonly_file('readonly')
argument_signatures = [
Sig('-x', type=argparse.FileType('w')),
Sig('spam', type=argparse.FileType('w')),
]
failures = ['-x', '', 'readonly']
successes = [
('foo', NS(x=None, spam=WFile('foo'))),
('-x foo bar', NS(x=WFile('foo'), spam=WFile('bar'))),
('bar -x foo', NS(x=WFile('foo'), spam=WFile('bar'))),
('-x - -', NS(x=sys.stdout, spam=sys.stdout)),
]
class TestFileTypeWB(TempDirMixin, ParserTestCase):
argument_signatures = [
Sig('-x', type=argparse.FileType('wb')),
Sig('spam', type=argparse.FileType('wb')),
]
failures = ['-x', '']
successes = [
('foo', NS(x=None, spam=WFile('foo'))),
('-x foo bar', NS(x=WFile('foo'), spam=WFile('bar'))),
('bar -x foo', NS(x=WFile('foo'), spam=WFile('bar'))),
('-x - -', NS(x=sys.stdout, spam=sys.stdout)),
]
class TestTypeCallable(ParserTestCase):
"""Test some callables as option/argument types"""
argument_signatures = [
Sig('--eggs', type=complex),
Sig('spam', type=float),
]
failures = ['a', '42j', '--eggs a', '--eggs 2i']
successes = [
('--eggs=42 42', NS(eggs=42, spam=42.0)),
('--eggs 2j -- -1.5', NS(eggs=2j, spam=-1.5)),
('1024.675', NS(eggs=None, spam=1024.675)),
]
class TestTypeUserDefined(ParserTestCase):
"""Test a user-defined option/argument type"""
class MyType(TestCase):
def __init__(self, value):
self.value = value
def __eq__(self, other):
return (type(self), self.value) == (type(other), other.value)
argument_signatures = [
Sig('-x', type=MyType),
Sig('spam', type=MyType),
]
failures = []
successes = [
('a -x b', NS(x=MyType('b'), spam=MyType('a'))),
('-xf g', NS(x=MyType('f'), spam=MyType('g'))),
]
class TestTypeClassicClass(ParserTestCase):
"""Test a classic class type"""
class C:
def __init__(self, value):
self.value = value
def __eq__(self, other):
return (type(self), self.value) == (type(other), other.value)
argument_signatures = [
Sig('-x', type=C),
Sig('spam', type=C),
]
failures = []
successes = [
('a -x b', NS(x=C('b'), spam=C('a'))),
('-xf g', NS(x=C('f'), spam=C('g'))),
]
class TestTypeRegistration(TestCase):
"""Test a user-defined type by registering it"""
def test(self):
def get_my_type(string):
return 'my_type{%s}' % string
parser = argparse.ArgumentParser()
parser.register('type', 'my_type', get_my_type)
parser.add_argument('-x', type='my_type')
parser.add_argument('y', type='my_type')
self.assertEqual(parser.parse_args('1'.split()),
NS(x=None, y='my_type{1}'))
self.assertEqual(parser.parse_args('-x 1 42'.split()),
NS(x='my_type{1}', y='my_type{42}'))
# ============
# Action tests
# ============
class TestActionUserDefined(ParserTestCase):
"""Test a user-defined option/argument action"""
class OptionalAction(argparse.Action):
def __call__(self, parser, namespace, value, option_string=None):
try:
# check destination and option string
assert self.dest == 'spam', 'dest: %s' % self.dest
assert option_string == '-s', 'flag: %s' % option_string
# when option is before argument, badger=2, and when
# option is after argument, badger=<whatever was set>
expected_ns = NS(spam=0.25)
if value in [0.125, 0.625]:
expected_ns.badger = 2
elif value in [2.0]:
expected_ns.badger = 84
else:
raise AssertionError('value: %s' % value)
assert expected_ns == namespace, ('expected %s, got %s' %
(expected_ns, namespace))
except AssertionError:
e = sys.exc_info()[1]
raise ArgumentParserError('opt_action failed: %s' % e)
setattr(namespace, 'spam', value)
class PositionalAction(argparse.Action):
def __call__(self, parser, namespace, value, option_string=None):
try:
assert option_string is None, ('option_string: %s' %
option_string)
# check destination
assert self.dest == 'badger', 'dest: %s' % self.dest
# when argument is before option, spam=0.25, and when
# option is after argument, spam=<whatever was set>
expected_ns = NS(badger=2)
if value in [42, 84]:
expected_ns.spam = 0.25
elif value in [1]:
expected_ns.spam = 0.625
elif value in [2]:
expected_ns.spam = 0.125
else:
raise AssertionError('value: %s' % value)
assert expected_ns == namespace, ('expected %s, got %s' %
(expected_ns, namespace))
except AssertionError:
e = sys.exc_info()[1]
raise ArgumentParserError('arg_action failed: %s' % e)
setattr(namespace, 'badger', value)
argument_signatures = [
Sig('-s', dest='spam', action=OptionalAction,
type=float, default=0.25),
Sig('badger', action=PositionalAction,
type=int, nargs='?', default=2),
]
failures = []
successes = [
('-s0.125', NS(spam=0.125, badger=2)),
('42', NS(spam=0.25, badger=42)),
('-s 0.625 1', NS(spam=0.625, badger=1)),
('84 -s2', NS(spam=2.0, badger=84)),
]
class TestActionRegistration(TestCase):
"""Test a user-defined action supplied by registering it"""
class MyAction(argparse.Action):
def __call__(self, parser, namespace, values, option_string=None):
setattr(namespace, self.dest, 'foo[%s]' % values)
def test(self):
parser = argparse.ArgumentParser()
parser.register('action', 'my_action', self.MyAction)
parser.add_argument('badger', action='my_action')
self.assertEqual(parser.parse_args(['1']), NS(badger='foo[1]'))
self.assertEqual(parser.parse_args(['42']), NS(badger='foo[42]'))
# ================
# Subparsers tests
# ================
class TestAddSubparsers(TestCase):
"""Test the add_subparsers method"""
def assertArgumentParserError(self, *args, **kwargs):
self.assertRaises(ArgumentParserError, *args, **kwargs)
def _get_parser(self, subparser_help=False, prefix_chars=None,
aliases=False):
# create a parser with a subparsers argument
if prefix_chars:
parser = ErrorRaisingArgumentParser(
prog='PROG', description='main description', prefix_chars=prefix_chars)
parser.add_argument(
prefix_chars[0] * 2 + 'foo', action='store_true', help='foo help')
else:
parser = ErrorRaisingArgumentParser(
prog='PROG', description='main description')
parser.add_argument(
'--foo', action='store_true', help='foo help')
parser.add_argument(
'bar', type=float, help='bar help')
# check that only one subparsers argument can be added
subparsers_kwargs = {}
if aliases:
subparsers_kwargs['metavar'] = 'COMMAND'
subparsers_kwargs['title'] = 'commands'
else:
subparsers_kwargs['help'] = 'command help'
subparsers = parser.add_subparsers(**subparsers_kwargs)
self.assertArgumentParserError(parser.add_subparsers)
# add first sub-parser
parser1_kwargs = dict(description='1 description')
if subparser_help:
parser1_kwargs['help'] = '1 help'
if aliases:
parser1_kwargs['aliases'] = ['1alias1', '1alias2']
parser1 = subparsers.add_parser('1', **parser1_kwargs)
parser1.add_argument('-w', type=int, help='w help')
parser1.add_argument('x', choices='abc', help='x help')
# add second sub-parser
parser2_kwargs = dict(description='2 description')
if subparser_help:
parser2_kwargs['help'] = '2 help'
parser2 = subparsers.add_parser('2', **parser2_kwargs)
parser2.add_argument('-y', choices='123', help='y help')
parser2.add_argument('z', type=complex, nargs='*', help='z help')
# add third sub-parser
parser3_kwargs = dict(description='3 description')
if subparser_help:
parser3_kwargs['help'] = '3 help'
parser3 = subparsers.add_parser('3', **parser3_kwargs)
parser3.add_argument('t', type=int, help='t help')
parser3.add_argument('u', nargs='...', help='u help')
# return the main parser
return parser
def setUp(self):
super().setUp()
self.parser = self._get_parser()
self.command_help_parser = self._get_parser(subparser_help=True)
def test_parse_args_failures(self):
# check some failure cases:
for args_str in ['', 'a', 'a a', '0.5 a', '0.5 1',
'0.5 1 -y', '0.5 2 -w']:
args = args_str.split()
self.assertArgumentParserError(self.parser.parse_args, args)
def test_parse_args(self):
# check some non-failure cases:
self.assertEqual(
self.parser.parse_args('0.5 1 b -w 7'.split()),
NS(foo=False, bar=0.5, w=7, x='b'),
)
self.assertEqual(
self.parser.parse_args('0.25 --foo 2 -y 2 3j -- -1j'.split()),
NS(foo=True, bar=0.25, y='2', z=[3j, -1j]),
)
self.assertEqual(
self.parser.parse_args('--foo 0.125 1 c'.split()),
NS(foo=True, bar=0.125, w=None, x='c'),
)
self.assertEqual(
self.parser.parse_args('-1.5 3 11 -- a --foo 7 -- b'.split()),
NS(foo=False, bar=-1.5, t=11, u=['a', '--foo', '7', '--', 'b']),
)
def test_parse_known_args(self):
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), []),
)
self.assertEqual(
self.parser.parse_known_args('0.5 -p 1 b -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-p']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -w 7 -p'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-p']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -q -rs -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-q', '-rs']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 -W 1 b -X Y -w 7 Z'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-W', '-X', 'Y', 'Z']),
)
def test_dest(self):
parser = ErrorRaisingArgumentParser()
parser.add_argument('--foo', action='store_true')
subparsers = parser.add_subparsers(dest='bar')
parser1 = subparsers.add_parser('1')
parser1.add_argument('baz')
self.assertEqual(NS(foo=False, bar='1', baz='2'),
parser.parse_args('1 2'.split()))
def test_help(self):
self.assertEqual(self.parser.format_usage(),
'usage: PROG [-h] [--foo] bar {1,2,3} ...\n')
self.assertEqual(self.parser.format_help(), textwrap.dedent('''\
usage: PROG [-h] [--foo] bar {1,2,3} ...
main description
positional arguments:
bar bar help
{1,2,3} command help
optional arguments:
-h, --help show this help message and exit
--foo foo help
'''))
def test_help_extra_prefix_chars(self):
# Make sure - is still used for help if it is a non-first prefix char
parser = self._get_parser(prefix_chars='+:-')
self.assertEqual(parser.format_usage(),
'usage: PROG [-h] [++foo] bar {1,2,3} ...\n')
self.assertEqual(parser.format_help(), textwrap.dedent('''\
usage: PROG [-h] [++foo] bar {1,2,3} ...
main description
positional arguments:
bar bar help
{1,2,3} command help
optional arguments:
-h, --help show this help message and exit
++foo foo help
'''))
def test_help_alternate_prefix_chars(self):
parser = self._get_parser(prefix_chars='+:/')
self.assertEqual(parser.format_usage(),
'usage: PROG [+h] [++foo] bar {1,2,3} ...\n')
self.assertEqual(parser.format_help(), textwrap.dedent('''\
usage: PROG [+h] [++foo] bar {1,2,3} ...
main description
positional arguments:
bar bar help
{1,2,3} command help
optional arguments:
+h, ++help show this help message and exit
++foo foo help
'''))
def test_parser_command_help(self):
self.assertEqual(self.command_help_parser.format_usage(),
'usage: PROG [-h] [--foo] bar {1,2,3} ...\n')
self.assertEqual(self.command_help_parser.format_help(),
textwrap.dedent('''\
usage: PROG [-h] [--foo] bar {1,2,3} ...
main description
positional arguments:
bar bar help
{1,2,3} command help
1 1 help
2 2 help
3 3 help
optional arguments:
-h, --help show this help message and exit
--foo foo help
'''))
def test_subparser_title_help(self):
parser = ErrorRaisingArgumentParser(prog='PROG',
description='main description')
parser.add_argument('--foo', action='store_true', help='foo help')
parser.add_argument('bar', help='bar help')
subparsers = parser.add_subparsers(title='subcommands',
description='command help',
help='additional text')
parser1 = subparsers.add_parser('1')
parser2 = subparsers.add_parser('2')
self.assertEqual(parser.format_usage(),
'usage: PROG [-h] [--foo] bar {1,2} ...\n')
self.assertEqual(parser.format_help(), textwrap.dedent('''\
usage: PROG [-h] [--foo] bar {1,2} ...
main description
positional arguments:
bar bar help
optional arguments:
-h, --help show this help message and exit
--foo foo help
subcommands:
command help
{1,2} additional text
'''))
def _test_subparser_help(self, args_str, expected_help):
try:
self.parser.parse_args(args_str.split())
except ArgumentParserError:
err = sys.exc_info()[1]
if err.stdout != expected_help:
print(repr(expected_help))
print(repr(err.stdout))
self.assertEqual(err.stdout, expected_help)
def test_subparser1_help(self):
self._test_subparser_help('5.0 1 -h', textwrap.dedent('''\
usage: PROG bar 1 [-h] [-w W] {a,b,c}
1 description
positional arguments:
{a,b,c} x help
optional arguments:
-h, --help show this help message and exit
-w W w help
'''))
def test_subparser2_help(self):
self._test_subparser_help('5.0 2 -h', textwrap.dedent('''\
usage: PROG bar 2 [-h] [-y {1,2,3}] [z [z ...]]
2 description
positional arguments:
z z help
optional arguments:
-h, --help show this help message and exit
-y {1,2,3} y help
'''))
def test_alias_invocation(self):
parser = self._get_parser(aliases=True)
self.assertEqual(
parser.parse_known_args('0.5 1alias1 b'.split()),
(NS(foo=False, bar=0.5, w=None, x='b'), []),
)
self.assertEqual(
parser.parse_known_args('0.5 1alias2 b'.split()),
(NS(foo=False, bar=0.5, w=None, x='b'), []),
)
def test_error_alias_invocation(self):
parser = self._get_parser(aliases=True)
self.assertArgumentParserError(parser.parse_args,
'0.5 1alias3 b'.split())
def test_alias_help(self):
parser = self._get_parser(aliases=True, subparser_help=True)
self.maxDiff = None
self.assertEqual(parser.format_help(), textwrap.dedent("""\
usage: PROG [-h] [--foo] bar COMMAND ...
main description
positional arguments:
bar bar help
optional arguments:
-h, --help show this help message and exit
--foo foo help
commands:
COMMAND
1 (1alias1, 1alias2)
1 help
2 2 help
3 3 help
"""))
# ============
# Groups tests
# ============
class TestPositionalsGroups(TestCase):
"""Tests that order of group positionals matches construction order"""
def test_nongroup_first(self):
parser = ErrorRaisingArgumentParser()
parser.add_argument('foo')
group = parser.add_argument_group('g')
group.add_argument('bar')
parser.add_argument('baz')
expected = NS(foo='1', bar='2', baz='3')
result = parser.parse_args('1 2 3'.split())
self.assertEqual(expected, result)
def test_group_first(self):
parser = ErrorRaisingArgumentParser()
group = parser.add_argument_group('xxx')
group.add_argument('foo')
parser.add_argument('bar')
parser.add_argument('baz')
expected = NS(foo='1', bar='2', baz='3')
result = parser.parse_args('1 2 3'.split())
self.assertEqual(expected, result)
def test_interleaved_groups(self):
parser = ErrorRaisingArgumentParser()
group = parser.add_argument_group('xxx')
parser.add_argument('foo')
group.add_argument('bar')
parser.add_argument('baz')
group = parser.add_argument_group('yyy')
group.add_argument('frell')
expected = NS(foo='1', bar='2', baz='3', frell='4')
result = parser.parse_args('1 2 3 4'.split())
self.assertEqual(expected, result)
# ===================
# Parent parser tests
# ===================
class TestParentParsers(TestCase):
"""Tests that parsers can be created with parent parsers"""
def assertArgumentParserError(self, *args, **kwargs):
self.assertRaises(ArgumentParserError, *args, **kwargs)
def setUp(self):
super().setUp()
self.wxyz_parent = ErrorRaisingArgumentParser(add_help=False)
self.wxyz_parent.add_argument('--w')
x_group = self.wxyz_parent.add_argument_group('x')
x_group.add_argument('-y')
self.wxyz_parent.add_argument('z')
self.abcd_parent = ErrorRaisingArgumentParser(add_help=False)
self.abcd_parent.add_argument('a')
self.abcd_parent.add_argument('-b')
c_group = self.abcd_parent.add_argument_group('c')
c_group.add_argument('--d')
self.w_parent = ErrorRaisingArgumentParser(add_help=False)
self.w_parent.add_argument('--w')
self.z_parent = ErrorRaisingArgumentParser(add_help=False)
self.z_parent.add_argument('z')
# parents with mutually exclusive groups
self.ab_mutex_parent = ErrorRaisingArgumentParser(add_help=False)
group = self.ab_mutex_parent.add_mutually_exclusive_group()
group.add_argument('-a', action='store_true')
group.add_argument('-b', action='store_true')
self.main_program = os.path.basename(sys.argv[0])
def test_single_parent(self):
parser = ErrorRaisingArgumentParser(parents=[self.wxyz_parent])
self.assertEqual(parser.parse_args('-y 1 2 --w 3'.split()),
NS(w='3', y='1', z='2'))
def test_single_parent_mutex(self):
self._test_mutex_ab(self.ab_mutex_parent.parse_args)
parser = ErrorRaisingArgumentParser(parents=[self.ab_mutex_parent])
self._test_mutex_ab(parser.parse_args)
def test_single_granparent_mutex(self):
parents = [self.ab_mutex_parent]
parser = ErrorRaisingArgumentParser(add_help=False, parents=parents)
parser = ErrorRaisingArgumentParser(parents=[parser])
self._test_mutex_ab(parser.parse_args)
def _test_mutex_ab(self, parse_args):
self.assertEqual(parse_args([]), NS(a=False, b=False))
self.assertEqual(parse_args(['-a']), NS(a=True, b=False))
self.assertEqual(parse_args(['-b']), NS(a=False, b=True))
self.assertArgumentParserError(parse_args, ['-a', '-b'])
self.assertArgumentParserError(parse_args, ['-b', '-a'])
self.assertArgumentParserError(parse_args, ['-c'])
self.assertArgumentParserError(parse_args, ['-a', '-c'])
self.assertArgumentParserError(parse_args, ['-b', '-c'])
def test_multiple_parents(self):
parents = [self.abcd_parent, self.wxyz_parent]
parser = ErrorRaisingArgumentParser(parents=parents)
self.assertEqual(parser.parse_args('--d 1 --w 2 3 4'.split()),
NS(a='3', b=None, d='1', w='2', y=None, z='4'))
def test_multiple_parents_mutex(self):
parents = [self.ab_mutex_parent, self.wxyz_parent]
parser = ErrorRaisingArgumentParser(parents=parents)
self.assertEqual(parser.parse_args('-a --w 2 3'.split()),
NS(a=True, b=False, w='2', y=None, z='3'))
self.assertArgumentParserError(
parser.parse_args, '-a --w 2 3 -b'.split())
self.assertArgumentParserError(
parser.parse_args, '-a -b --w 2 3'.split())
def test_conflicting_parents(self):
self.assertRaises(
argparse.ArgumentError,
argparse.ArgumentParser,
parents=[self.w_parent, self.wxyz_parent])
def test_conflicting_parents_mutex(self):
self.assertRaises(
argparse.ArgumentError,
argparse.ArgumentParser,
parents=[self.abcd_parent, self.ab_mutex_parent])
def test_same_argument_name_parents(self):
parents = [self.wxyz_parent, self.z_parent]
parser = ErrorRaisingArgumentParser(parents=parents)
self.assertEqual(parser.parse_args('1 2'.split()),
NS(w=None, y=None, z='2'))
def test_subparser_parents(self):
parser = ErrorRaisingArgumentParser()
subparsers = parser.add_subparsers()
abcde_parser = subparsers.add_parser('bar', parents=[self.abcd_parent])
abcde_parser.add_argument('e')
self.assertEqual(parser.parse_args('bar -b 1 --d 2 3 4'.split()),
NS(a='3', b='1', d='2', e='4'))
def test_subparser_parents_mutex(self):
parser = ErrorRaisingArgumentParser()
subparsers = parser.add_subparsers()
parents = [self.ab_mutex_parent]
abc_parser = subparsers.add_parser('foo', parents=parents)
c_group = abc_parser.add_argument_group('c_group')
c_group.add_argument('c')
parents = [self.wxyz_parent, self.ab_mutex_parent]
wxyzabe_parser = subparsers.add_parser('bar', parents=parents)
wxyzabe_parser.add_argument('e')
self.assertEqual(parser.parse_args('foo -a 4'.split()),
NS(a=True, b=False, c='4'))
self.assertEqual(parser.parse_args('bar -b --w 2 3 4'.split()),
NS(a=False, b=True, w='2', y=None, z='3', e='4'))
self.assertArgumentParserError(
parser.parse_args, 'foo -a -b 4'.split())
self.assertArgumentParserError(
parser.parse_args, 'bar -b -a 4'.split())
def test_parent_help(self):
parents = [self.abcd_parent, self.wxyz_parent]
parser = ErrorRaisingArgumentParser(parents=parents)
parser_help = parser.format_help()
progname = self.main_program
self.assertEqual(parser_help, textwrap.dedent('''\
usage: {}{}[-h] [-b B] [--d D] [--w W] [-y Y] a z
positional arguments:
a
z
optional arguments:
-h, --help show this help message and exit
-b B
--w W
c:
--d D
x:
-y Y
'''.format(progname, ' ' if progname else '' )))
def test_groups_parents(self):
parent = ErrorRaisingArgumentParser(add_help=False)
g = parent.add_argument_group(title='g', description='gd')
g.add_argument('-w')
g.add_argument('-x')
m = parent.add_mutually_exclusive_group()
m.add_argument('-y')
m.add_argument('-z')
parser = ErrorRaisingArgumentParser(parents=[parent])
self.assertRaises(ArgumentParserError, parser.parse_args,
['-y', 'Y', '-z', 'Z'])
parser_help = parser.format_help()
progname = self.main_program
self.assertEqual(parser_help, textwrap.dedent('''\
usage: {}{}[-h] [-w W] [-x X] [-y Y | -z Z]
optional arguments:
-h, --help show this help message and exit
-y Y
-z Z
g:
gd
-w W
-x X
'''.format(progname, ' ' if progname else '' )))
# ==============================
# Mutually exclusive group tests
# ==============================
class TestMutuallyExclusiveGroupErrors(TestCase):
def test_invalid_add_argument_group(self):
parser = ErrorRaisingArgumentParser()
raises = self.assertRaises
raises(TypeError, parser.add_mutually_exclusive_group, title='foo')
def test_invalid_add_argument(self):
parser = ErrorRaisingArgumentParser()
group = parser.add_mutually_exclusive_group()
add_argument = group.add_argument
raises = self.assertRaises
raises(ValueError, add_argument, '--foo', required=True)
raises(ValueError, add_argument, 'bar')
raises(ValueError, add_argument, 'bar', nargs='+')
raises(ValueError, add_argument, 'bar', nargs=1)
raises(ValueError, add_argument, 'bar', nargs=argparse.PARSER)
def test_help(self):
parser = ErrorRaisingArgumentParser(prog='PROG')
group1 = parser.add_mutually_exclusive_group()
group1.add_argument('--foo', action='store_true')
group1.add_argument('--bar', action='store_false')
group2 = parser.add_mutually_exclusive_group()
group2.add_argument('--soup', action='store_true')
group2.add_argument('--nuts', action='store_false')
expected = '''\
usage: PROG [-h] [--foo | --bar] [--soup | --nuts]
optional arguments:
-h, --help show this help message and exit
--foo
--bar
--soup
--nuts
'''
self.assertEqual(parser.format_help(), textwrap.dedent(expected))
class MEMixin(object):
def test_failures_when_not_required(self):
parse_args = self.get_parser(required=False).parse_args
error = ArgumentParserError
for args_string in self.failures:
self.assertRaises(error, parse_args, args_string.split())
def test_failures_when_required(self):
parse_args = self.get_parser(required=True).parse_args
error = ArgumentParserError
for args_string in self.failures + ['']:
self.assertRaises(error, parse_args, args_string.split())
def test_successes_when_not_required(self):
parse_args = self.get_parser(required=False).parse_args
successes = self.successes + self.successes_when_not_required
for args_string, expected_ns in successes:
actual_ns = parse_args(args_string.split())
self.assertEqual(actual_ns, expected_ns)
def test_successes_when_required(self):
parse_args = self.get_parser(required=True).parse_args
for args_string, expected_ns in self.successes:
actual_ns = parse_args(args_string.split())
self.assertEqual(actual_ns, expected_ns)
def test_usage_when_not_required(self):
format_usage = self.get_parser(required=False).format_usage
expected_usage = self.usage_when_not_required
self.assertEqual(format_usage(), textwrap.dedent(expected_usage))
def test_usage_when_required(self):
format_usage = self.get_parser(required=True).format_usage
expected_usage = self.usage_when_required
self.assertEqual(format_usage(), textwrap.dedent(expected_usage))
def test_help_when_not_required(self):
format_help = self.get_parser(required=False).format_help
help = self.usage_when_not_required + self.help
self.assertEqual(format_help(), textwrap.dedent(help))
def test_help_when_required(self):
format_help = self.get_parser(required=True).format_help
help = self.usage_when_required + self.help
self.assertEqual(format_help(), textwrap.dedent(help))
class TestMutuallyExclusiveSimple(MEMixin, TestCase):
def get_parser(self, required=None):
parser = ErrorRaisingArgumentParser(prog='PROG')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('--bar', help='bar help')
group.add_argument('--baz', nargs='?', const='Z', help='baz help')
return parser
failures = ['--bar X --baz Y', '--bar X --baz']
successes = [
('--bar X', NS(bar='X', baz=None)),
('--bar X --bar Z', NS(bar='Z', baz=None)),
('--baz Y', NS(bar=None, baz='Y')),
('--baz', NS(bar=None, baz='Z')),
]
successes_when_not_required = [
('', NS(bar=None, baz=None)),
]
usage_when_not_required = '''\
usage: PROG [-h] [--bar BAR | --baz [BAZ]]
'''
usage_when_required = '''\
usage: PROG [-h] (--bar BAR | --baz [BAZ])
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
--bar BAR bar help
--baz [BAZ] baz help
'''
class TestMutuallyExclusiveLong(MEMixin, TestCase):
def get_parser(self, required=None):
parser = ErrorRaisingArgumentParser(prog='PROG')
parser.add_argument('--abcde', help='abcde help')
parser.add_argument('--fghij', help='fghij help')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('--klmno', help='klmno help')
group.add_argument('--pqrst', help='pqrst help')
return parser
failures = ['--klmno X --pqrst Y']
successes = [
('--klmno X', NS(abcde=None, fghij=None, klmno='X', pqrst=None)),
('--abcde Y --klmno X',
NS(abcde='Y', fghij=None, klmno='X', pqrst=None)),
('--pqrst X', NS(abcde=None, fghij=None, klmno=None, pqrst='X')),
('--pqrst X --fghij Y',
NS(abcde=None, fghij='Y', klmno=None, pqrst='X')),
]
successes_when_not_required = [
('', NS(abcde=None, fghij=None, klmno=None, pqrst=None)),
]
usage_when_not_required = '''\
usage: PROG [-h] [--abcde ABCDE] [--fghij FGHIJ]
[--klmno KLMNO | --pqrst PQRST]
'''
usage_when_required = '''\
usage: PROG [-h] [--abcde ABCDE] [--fghij FGHIJ]
(--klmno KLMNO | --pqrst PQRST)
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
--abcde ABCDE abcde help
--fghij FGHIJ fghij help
--klmno KLMNO klmno help
--pqrst PQRST pqrst help
'''
class TestMutuallyExclusiveFirstSuppressed(MEMixin, TestCase):
def get_parser(self, required):
parser = ErrorRaisingArgumentParser(prog='PROG')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('-x', help=argparse.SUPPRESS)
group.add_argument('-y', action='store_false', help='y help')
return parser
failures = ['-x X -y']
successes = [
('-x X', NS(x='X', y=True)),
('-x X -x Y', NS(x='Y', y=True)),
('-y', NS(x=None, y=False)),
]
successes_when_not_required = [
('', NS(x=None, y=True)),
]
usage_when_not_required = '''\
usage: PROG [-h] [-y]
'''
usage_when_required = '''\
usage: PROG [-h] -y
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
-y y help
'''
class TestMutuallyExclusiveManySuppressed(MEMixin, TestCase):
def get_parser(self, required):
parser = ErrorRaisingArgumentParser(prog='PROG')
group = parser.add_mutually_exclusive_group(required=required)
add = group.add_argument
add('--spam', action='store_true', help=argparse.SUPPRESS)
add('--badger', action='store_false', help=argparse.SUPPRESS)
add('--bladder', help=argparse.SUPPRESS)
return parser
failures = [
'--spam --badger',
'--badger --bladder B',
'--bladder B --spam',
]
successes = [
('--spam', NS(spam=True, badger=True, bladder=None)),
('--badger', NS(spam=False, badger=False, bladder=None)),
('--bladder B', NS(spam=False, badger=True, bladder='B')),
('--spam --spam', NS(spam=True, badger=True, bladder=None)),
]
successes_when_not_required = [
('', NS(spam=False, badger=True, bladder=None)),
]
usage_when_required = usage_when_not_required = '''\
usage: PROG [-h]
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
'''
class TestMutuallyExclusiveOptionalAndPositional(MEMixin, TestCase):
def get_parser(self, required):
parser = ErrorRaisingArgumentParser(prog='PROG')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('--foo', action='store_true', help='FOO')
group.add_argument('--spam', help='SPAM')
group.add_argument('badger', nargs='*', default='X', help='BADGER')
return parser
failures = [
'--foo --spam S',
'--spam S X',
'X --foo',
'X Y Z --spam S',
'--foo X Y',
]
successes = [
('--foo', NS(foo=True, spam=None, badger='X')),
('--spam S', NS(foo=False, spam='S', badger='X')),
('X', NS(foo=False, spam=None, badger=['X'])),
('X Y Z', NS(foo=False, spam=None, badger=['X', 'Y', 'Z'])),
]
successes_when_not_required = [
('', NS(foo=False, spam=None, badger='X')),
]
usage_when_not_required = '''\
usage: PROG [-h] [--foo | --spam SPAM | badger [badger ...]]
'''
usage_when_required = '''\
usage: PROG [-h] (--foo | --spam SPAM | badger [badger ...])
'''
help = '''\
positional arguments:
badger BADGER
optional arguments:
-h, --help show this help message and exit
--foo FOO
--spam SPAM SPAM
'''
class TestMutuallyExclusiveOptionalsMixed(MEMixin, TestCase):
def get_parser(self, required):
parser = ErrorRaisingArgumentParser(prog='PROG')
parser.add_argument('-x', action='store_true', help='x help')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('-a', action='store_true', help='a help')
group.add_argument('-b', action='store_true', help='b help')
parser.add_argument('-y', action='store_true', help='y help')
group.add_argument('-c', action='store_true', help='c help')
return parser
failures = ['-a -b', '-b -c', '-a -c', '-a -b -c']
successes = [
('-a', NS(a=True, b=False, c=False, x=False, y=False)),
('-b', NS(a=False, b=True, c=False, x=False, y=False)),
('-c', NS(a=False, b=False, c=True, x=False, y=False)),
('-a -x', NS(a=True, b=False, c=False, x=True, y=False)),
('-y -b', NS(a=False, b=True, c=False, x=False, y=True)),
('-x -y -c', NS(a=False, b=False, c=True, x=True, y=True)),
]
successes_when_not_required = [
('', NS(a=False, b=False, c=False, x=False, y=False)),
('-x', NS(a=False, b=False, c=False, x=True, y=False)),
('-y', NS(a=False, b=False, c=False, x=False, y=True)),
]
usage_when_required = usage_when_not_required = '''\
usage: PROG [-h] [-x] [-a] [-b] [-y] [-c]
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
-x x help
-a a help
-b b help
-y y help
-c c help
'''
class TestMutuallyExclusiveInGroup(MEMixin, TestCase):
def get_parser(self, required=None):
parser = ErrorRaisingArgumentParser(prog='PROG')
titled_group = parser.add_argument_group(
title='Titled group', description='Group description')
mutex_group = \
titled_group.add_mutually_exclusive_group(required=required)
mutex_group.add_argument('--bar', help='bar help')
mutex_group.add_argument('--baz', help='baz help')
return parser
failures = ['--bar X --baz Y', '--baz X --bar Y']
successes = [
('--bar X', NS(bar='X', baz=None)),
('--baz Y', NS(bar=None, baz='Y')),
]
successes_when_not_required = [
('', NS(bar=None, baz=None)),
]
usage_when_not_required = '''\
usage: PROG [-h] [--bar BAR | --baz BAZ]
'''
usage_when_required = '''\
usage: PROG [-h] (--bar BAR | --baz BAZ)
'''
help = '''\
optional arguments:
-h, --help show this help message and exit
Titled group:
Group description
--bar BAR bar help
--baz BAZ baz help
'''
class TestMutuallyExclusiveOptionalsAndPositionalsMixed(MEMixin, TestCase):
def get_parser(self, required):
parser = ErrorRaisingArgumentParser(prog='PROG')
parser.add_argument('x', help='x help')
parser.add_argument('-y', action='store_true', help='y help')
group = parser.add_mutually_exclusive_group(required=required)
group.add_argument('a', nargs='?', help='a help')
group.add_argument('-b', action='store_true', help='b help')
group.add_argument('-c', action='store_true', help='c help')
return parser
failures = ['X A -b', '-b -c', '-c X A']
successes = [
('X A', NS(a='A', b=False, c=False, x='X', y=False)),
('X -b', NS(a=None, b=True, c=False, x='X', y=False)),
('X -c', NS(a=None, b=False, c=True, x='X', y=False)),
('X A -y', NS(a='A', b=False, c=False, x='X', y=True)),
('X -y -b', NS(a=None, b=True, c=False, x='X', y=True)),
]
successes_when_not_required = [
('X', NS(a=None, b=False, c=False, x='X', y=False)),
('X -y', NS(a=None, b=False, c=False, x='X', y=True)),
]
usage_when_required = usage_when_not_required = '''\
usage: PROG [-h] [-y] [-b] [-c] x [a]
'''
help = '''\
positional arguments:
x x help
a a help
optional arguments:
-h, --help show this help message and exit
-y y help
-b b help
-c c help
'''
# =================================================
# Mutually exclusive group in parent parser tests
# =================================================
class MEPBase(object):
def get_parser(self, required=None):
parent = super(MEPBase, self).get_parser(required=required)
parser = ErrorRaisingArgumentParser(
prog=parent.prog, add_help=False, parents=[parent])
return parser
class TestMutuallyExclusiveGroupErrorsParent(
MEPBase, TestMutuallyExclusiveGroupErrors):
pass
class TestMutuallyExclusiveSimpleParent(
MEPBase, TestMutuallyExclusiveSimple):
pass
class TestMutuallyExclusiveLongParent(
MEPBase, TestMutuallyExclusiveLong):
pass
class TestMutuallyExclusiveFirstSuppressedParent(
MEPBase, TestMutuallyExclusiveFirstSuppressed):
pass
class TestMutuallyExclusiveManySuppressedParent(
MEPBase, TestMutuallyExclusiveManySuppressed):
pass
class TestMutuallyExclusiveOptionalAndPositionalParent(
MEPBase, TestMutuallyExclusiveOptionalAndPositional):
pass
class TestMutuallyExclusiveOptionalsMixedParent(
MEPBase, TestMutuallyExclusiveOptionalsMixed):
pass
class TestMutuallyExclusiveOptionalsAndPositionalsMixedParent(
MEPBase, TestMutuallyExclusiveOptionalsAndPositionalsMixed):
pass
# =================
# Set default tests
# =================
class TestSetDefaults(TestCase):
def test_set_defaults_no_args(self):
parser = ErrorRaisingArgumentParser()
parser.set_defaults(x='foo')
parser.set_defaults(y='bar', z=1)
self.assertEqual(NS(x='foo', y='bar', z=1),
parser.parse_args([]))
self.assertEqual(NS(x='foo', y='bar', z=1),
parser.parse_args([], NS()))
self.assertEqual(NS(x='baz', y='bar', z=1),
parser.parse_args([], NS(x='baz')))
self.assertEqual(NS(x='baz', y='bar', z=2),
parser.parse_args([], NS(x='baz', z=2)))
def test_set_defaults_with_args(self):
parser = ErrorRaisingArgumentParser()
parser.set_defaults(x='foo', y='bar')
parser.add_argument('-x', default='xfoox')
self.assertEqual(NS(x='xfoox', y='bar'),
parser.parse_args([]))
self.assertEqual(NS(x='xfoox', y='bar'),
parser.parse_args([], NS()))
self.assertEqual(NS(x='baz', y='bar'),
parser.parse_args([], NS(x='baz')))
self.assertEqual(NS(x='1', y='bar'),
parser.parse_args('-x 1'.split()))
self.assertEqual(NS(x='1', y='bar'),
parser.parse_args('-x 1'.split(), NS()))
self.assertEqual(NS(x='1', y='bar'),
parser.parse_args('-x 1'.split(), NS(x='baz')))
def test_set_defaults_subparsers(self):
parser = ErrorRaisingArgumentParser()
parser.set_defaults(x='foo')
subparsers = parser.add_subparsers()
parser_a = subparsers.add_parser('a')
parser_a.set_defaults(y='bar')
self.assertEqual(NS(x='foo', y='bar'),
parser.parse_args('a'.split()))
def test_set_defaults_parents(self):
parent = ErrorRaisingArgumentParser(add_help=False)
parent.set_defaults(x='foo')
parser = ErrorRaisingArgumentParser(parents=[parent])
self.assertEqual(NS(x='foo'), parser.parse_args([]))
def test_set_defaults_same_as_add_argument(self):
parser = ErrorRaisingArgumentParser()
parser.set_defaults(w='W', x='X', y='Y', z='Z')
parser.add_argument('-w')
parser.add_argument('-x', default='XX')
parser.add_argument('y', nargs='?')
parser.add_argument('z', nargs='?', default='ZZ')
# defaults set previously
self.assertEqual(NS(w='W', x='XX', y='Y', z='ZZ'),
parser.parse_args([]))
# reset defaults
parser.set_defaults(w='WW', x='X', y='YY', z='Z')
self.assertEqual(NS(w='WW', x='X', y='YY', z='Z'),
parser.parse_args([]))
def test_set_defaults_same_as_add_argument_group(self):
parser = ErrorRaisingArgumentParser()
parser.set_defaults(w='W', x='X', y='Y', z='Z')
group = parser.add_argument_group('foo')
group.add_argument('-w')
group.add_argument('-x', default='XX')
group.add_argument('y', nargs='?')
group.add_argument('z', nargs='?', default='ZZ')
# defaults set previously
self.assertEqual(NS(w='W', x='XX', y='Y', z='ZZ'),
parser.parse_args([]))
# reset defaults
parser.set_defaults(w='WW', x='X', y='YY', z='Z')
self.assertEqual(NS(w='WW', x='X', y='YY', z='Z'),
parser.parse_args([]))
# =================
# Get default tests
# =================
class TestGetDefault(TestCase):
def test_get_default(self):
parser = ErrorRaisingArgumentParser()
self.assertEqual(None, parser.get_default("foo"))
self.assertEqual(None, parser.get_default("bar"))
parser.add_argument("--foo")
self.assertEqual(None, parser.get_default("foo"))
self.assertEqual(None, parser.get_default("bar"))
parser.add_argument("--bar", type=int, default=42)
self.assertEqual(None, parser.get_default("foo"))
self.assertEqual(42, parser.get_default("bar"))
parser.set_defaults(foo="badger")
self.assertEqual("badger", parser.get_default("foo"))
self.assertEqual(42, parser.get_default("bar"))
# ==========================
# Namespace 'contains' tests
# ==========================
class TestNamespaceContainsSimple(TestCase):
def test_empty(self):
ns = argparse.Namespace()
self.assertEqual('' in ns, False)
self.assertEqual('' not in ns, True)
self.assertEqual('x' in ns, False)
def test_non_empty(self):
ns = argparse.Namespace(x=1, y=2)
self.assertEqual('x' in ns, True)
self.assertEqual('x' not in ns, False)
self.assertEqual('y' in ns, True)
self.assertEqual('' in ns, False)
self.assertEqual('xx' in ns, False)
self.assertEqual('z' in ns, False)
# =====================
# Help formatting tests
# =====================
class TestHelpFormattingMetaclass(type):
def __init__(cls, name, bases, bodydict):
if name == 'HelpTestCase':
return
class AddTests(object):
def __init__(self, test_class, func_suffix, std_name):
self.func_suffix = func_suffix
self.std_name = std_name
for test_func in [self.test_format,
self.test_print,
self.test_print_file]:
test_name = '%s_%s' % (test_func.__name__, func_suffix)
def test_wrapper(self, test_func=test_func):
test_func(self)
try:
test_wrapper.__name__ = test_name
except TypeError:
pass
setattr(test_class, test_name, test_wrapper)
def _get_parser(self, tester):
parser = argparse.ArgumentParser(
*tester.parser_signature.args,
**tester.parser_signature.kwargs)
for argument_sig in getattr(tester, 'argument_signatures', []):
parser.add_argument(*argument_sig.args,
**argument_sig.kwargs)
group_sigs = getattr(tester, 'argument_group_signatures', [])
for group_sig, argument_sigs in group_sigs:
group = parser.add_argument_group(*group_sig.args,
**group_sig.kwargs)
for argument_sig in argument_sigs:
group.add_argument(*argument_sig.args,
**argument_sig.kwargs)
subparsers_sigs = getattr(tester, 'subparsers_signatures', [])
if subparsers_sigs:
subparsers = parser.add_subparsers()
for subparser_sig in subparsers_sigs:
subparsers.add_parser(*subparser_sig.args,
**subparser_sig.kwargs)
return parser
def _test(self, tester, parser_text):
expected_text = getattr(tester, self.func_suffix)
expected_text = textwrap.dedent(expected_text)
if expected_text != parser_text:
print(repr(expected_text))
print(repr(parser_text))
for char1, char2 in zip(expected_text, parser_text):
if char1 != char2:
print('first diff: %r %r' % (char1, char2))
break
tester.assertEqual(expected_text, parser_text)
def test_format(self, tester):
parser = self._get_parser(tester)
format = getattr(parser, 'format_%s' % self.func_suffix)
self._test(tester, format())
def test_print(self, tester):
parser = self._get_parser(tester)
print_ = getattr(parser, 'print_%s' % self.func_suffix)
old_stream = getattr(sys, self.std_name)
setattr(sys, self.std_name, StdIOBuffer())
try:
print_()
parser_text = getattr(sys, self.std_name).getvalue()
finally:
setattr(sys, self.std_name, old_stream)
self._test(tester, parser_text)
def test_print_file(self, tester):
parser = self._get_parser(tester)
print_ = getattr(parser, 'print_%s' % self.func_suffix)
sfile = StdIOBuffer()
print_(sfile)
parser_text = sfile.getvalue()
self._test(tester, parser_text)
# add tests for {format,print}_{usage,help,version}
for func_suffix, std_name in [('usage', 'stdout'),
('help', 'stdout'),
('version', 'stderr')]:
AddTests(cls, func_suffix, std_name)
bases = TestCase,
HelpTestCase = TestHelpFormattingMetaclass('HelpTestCase', bases, {})
class TestHelpBiggerOptionals(HelpTestCase):
"""Make sure that argument help aligns when options are longer"""
parser_signature = Sig(prog='PROG', description='DESCRIPTION',
epilog='EPILOG', version='0.1')
argument_signatures = [
Sig('-x', action='store_true', help='X HELP'),
Sig('--y', help='Y HELP'),
Sig('foo', help='FOO HELP'),
Sig('bar', help='BAR HELP'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-v] [-x] [--y Y] foo bar
'''
help = usage + '''\
DESCRIPTION
positional arguments:
foo FOO HELP
bar BAR HELP
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-x X HELP
--y Y Y HELP
EPILOG
'''
version = '''\
0.1
'''
class TestHelpBiggerOptionalGroups(HelpTestCase):
"""Make sure that argument help aligns when options are longer"""
parser_signature = Sig(prog='PROG', description='DESCRIPTION',
epilog='EPILOG', version='0.1')
argument_signatures = [
Sig('-x', action='store_true', help='X HELP'),
Sig('--y', help='Y HELP'),
Sig('foo', help='FOO HELP'),
Sig('bar', help='BAR HELP'),
]
argument_group_signatures = [
(Sig('GROUP TITLE', description='GROUP DESCRIPTION'), [
Sig('baz', help='BAZ HELP'),
Sig('-z', nargs='+', help='Z HELP')]),
]
usage = '''\
usage: PROG [-h] [-v] [-x] [--y Y] [-z Z [Z ...]] foo bar baz
'''
help = usage + '''\
DESCRIPTION
positional arguments:
foo FOO HELP
bar BAR HELP
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-x X HELP
--y Y Y HELP
GROUP TITLE:
GROUP DESCRIPTION
baz BAZ HELP
-z Z [Z ...] Z HELP
EPILOG
'''
version = '''\
0.1
'''
class TestHelpBiggerPositionals(HelpTestCase):
"""Make sure that help aligns when arguments are longer"""
parser_signature = Sig(usage='USAGE', description='DESCRIPTION')
argument_signatures = [
Sig('-x', action='store_true', help='X HELP'),
Sig('--y', help='Y HELP'),
Sig('ekiekiekifekang', help='EKI HELP'),
Sig('bar', help='BAR HELP'),
]
argument_group_signatures = []
usage = '''\
usage: USAGE
'''
help = usage + '''\
DESCRIPTION
positional arguments:
ekiekiekifekang EKI HELP
bar BAR HELP
optional arguments:
-h, --help show this help message and exit
-x X HELP
--y Y Y HELP
'''
version = ''
class TestHelpReformatting(HelpTestCase):
"""Make sure that text after short names starts on the first line"""
parser_signature = Sig(
prog='PROG',
description=' oddly formatted\n'
'description\n'
'\n'
'that is so long that it should go onto multiple '
'lines when wrapped')
argument_signatures = [
Sig('-x', metavar='XX', help='oddly\n'
' formatted -x help'),
Sig('y', metavar='yyy', help='normal y help'),
]
argument_group_signatures = [
(Sig('title', description='\n'
' oddly formatted group\n'
'\n'
'description'),
[Sig('-a', action='store_true',
help=' oddly \n'
'formatted -a help \n'
' again, so long that it should be wrapped over '
'multiple lines')]),
]
usage = '''\
usage: PROG [-h] [-x XX] [-a] yyy
'''
help = usage + '''\
oddly formatted description that is so long that it should go onto \
multiple
lines when wrapped
positional arguments:
yyy normal y help
optional arguments:
-h, --help show this help message and exit
-x XX oddly formatted -x help
title:
oddly formatted group description
-a oddly formatted -a help again, so long that it should \
be wrapped
over multiple lines
'''
version = ''
class TestHelpWrappingShortNames(HelpTestCase):
"""Make sure that text after short names starts on the first line"""
parser_signature = Sig(prog='PROG', description= 'D\nD' * 30)
argument_signatures = [
Sig('-x', metavar='XX', help='XHH HX' * 20),
Sig('y', metavar='yyy', help='YH YH' * 20),
]
argument_group_signatures = [
(Sig('ALPHAS'), [
Sig('-a', action='store_true', help='AHHH HHA' * 10)]),
]
usage = '''\
usage: PROG [-h] [-x XX] [-a] yyy
'''
help = usage + '''\
D DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD \
DD DD DD
DD DD DD DD D
positional arguments:
yyy YH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH \
YHYH YHYH
YHYH YHYH YHYH YHYH YHYH YHYH YHYH YH
optional arguments:
-h, --help show this help message and exit
-x XX XHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH \
HXXHH HXXHH
HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HXXHH HX
ALPHAS:
-a AHHH HHAAHHH HHAAHHH HHAAHHH HHAAHHH HHAAHHH HHAAHHH \
HHAAHHH
HHAAHHH HHAAHHH HHA
'''
version = ''
class TestHelpWrappingLongNames(HelpTestCase):
"""Make sure that text after long names starts on the next line"""
parser_signature = Sig(usage='USAGE', description= 'D D' * 30,
version='V V'*30)
argument_signatures = [
Sig('-x', metavar='X' * 25, help='XH XH' * 20),
Sig('y', metavar='y' * 25, help='YH YH' * 20),
]
argument_group_signatures = [
(Sig('ALPHAS'), [
Sig('-a', metavar='A' * 25, help='AH AH' * 20),
Sig('z', metavar='z' * 25, help='ZH ZH' * 20)]),
]
usage = '''\
usage: USAGE
'''
help = usage + '''\
D DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD \
DD DD DD
DD DD DD DD D
positional arguments:
yyyyyyyyyyyyyyyyyyyyyyyyy
YH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH \
YHYH YHYH
YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YHYH YH
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-x XXXXXXXXXXXXXXXXXXXXXXXXX
XH XHXH XHXH XHXH XHXH XHXH XHXH XHXH XHXH \
XHXH XHXH
XHXH XHXH XHXH XHXH XHXH XHXH XHXH XHXH XHXH XH
ALPHAS:
-a AAAAAAAAAAAAAAAAAAAAAAAAA
AH AHAH AHAH AHAH AHAH AHAH AHAH AHAH AHAH \
AHAH AHAH
AHAH AHAH AHAH AHAH AHAH AHAH AHAH AHAH AHAH AH
zzzzzzzzzzzzzzzzzzzzzzzzz
ZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH \
ZHZH ZHZH
ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZHZH ZH
'''
version = '''\
V VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV \
VV VV VV
VV VV VV VV V
'''
class TestHelpUsage(HelpTestCase):
"""Test basic usage messages"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-w', nargs='+', help='w'),
Sig('-x', nargs='*', help='x'),
Sig('a', help='a'),
Sig('b', help='b', nargs=2),
Sig('c', help='c', nargs='?'),
]
argument_group_signatures = [
(Sig('group'), [
Sig('-y', nargs='?', help='y'),
Sig('-z', nargs=3, help='z'),
Sig('d', help='d', nargs='*'),
Sig('e', help='e', nargs='+'),
])
]
usage = '''\
usage: PROG [-h] [-w W [W ...]] [-x [X [X ...]]] [-y [Y]] [-z Z Z Z]
a b b [c] [d [d ...]] e [e ...]
'''
help = usage + '''\
positional arguments:
a a
b b
c c
optional arguments:
-h, --help show this help message and exit
-w W [W ...] w
-x [X [X ...]] x
group:
-y [Y] y
-z Z Z Z z
d d
e e
'''
version = ''
class TestHelpOnlyUserGroups(HelpTestCase):
"""Test basic usage messages"""
parser_signature = Sig(prog='PROG', add_help=False)
argument_signatures = []
argument_group_signatures = [
(Sig('xxxx'), [
Sig('-x', help='x'),
Sig('a', help='a'),
]),
(Sig('yyyy'), [
Sig('b', help='b'),
Sig('-y', help='y'),
]),
]
usage = '''\
usage: PROG [-x X] [-y Y] a b
'''
help = usage + '''\
xxxx:
-x X x
a a
yyyy:
b b
-y Y y
'''
version = ''
class TestHelpUsageLongProg(HelpTestCase):
"""Test usage messages where the prog is long"""
parser_signature = Sig(prog='P' * 60)
argument_signatures = [
Sig('-w', metavar='W'),
Sig('-x', metavar='X'),
Sig('a'),
Sig('b'),
]
argument_group_signatures = []
usage = '''\
usage: PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
[-h] [-w W] [-x X] a b
'''
help = usage + '''\
positional arguments:
a
b
optional arguments:
-h, --help show this help message and exit
-w W
-x X
'''
version = ''
class TestHelpUsageLongProgOptionsWrap(HelpTestCase):
"""Test usage messages where the prog is long and the optionals wrap"""
parser_signature = Sig(prog='P' * 60)
argument_signatures = [
Sig('-w', metavar='W' * 25),
Sig('-x', metavar='X' * 25),
Sig('-y', metavar='Y' * 25),
Sig('-z', metavar='Z' * 25),
Sig('a'),
Sig('b'),
]
argument_group_signatures = []
usage = '''\
usage: PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
[-h] [-w WWWWWWWWWWWWWWWWWWWWWWWWW] \
[-x XXXXXXXXXXXXXXXXXXXXXXXXX]
[-y YYYYYYYYYYYYYYYYYYYYYYYYY] [-z ZZZZZZZZZZZZZZZZZZZZZZZZZ]
a b
'''
help = usage + '''\
positional arguments:
a
b
optional arguments:
-h, --help show this help message and exit
-w WWWWWWWWWWWWWWWWWWWWWWWWW
-x XXXXXXXXXXXXXXXXXXXXXXXXX
-y YYYYYYYYYYYYYYYYYYYYYYYYY
-z ZZZZZZZZZZZZZZZZZZZZZZZZZ
'''
version = ''
class TestHelpUsageLongProgPositionalsWrap(HelpTestCase):
"""Test usage messages where the prog is long and the positionals wrap"""
parser_signature = Sig(prog='P' * 60, add_help=False)
argument_signatures = [
Sig('a' * 25),
Sig('b' * 25),
Sig('c' * 25),
]
argument_group_signatures = []
usage = '''\
usage: PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
aaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
help = usage + '''\
positional arguments:
aaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
version = ''
class TestHelpUsageOptionalsWrap(HelpTestCase):
"""Test usage messages where the optionals wrap"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-w', metavar='W' * 25),
Sig('-x', metavar='X' * 25),
Sig('-y', metavar='Y' * 25),
Sig('-z', metavar='Z' * 25),
Sig('a'),
Sig('b'),
Sig('c'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-w WWWWWWWWWWWWWWWWWWWWWWWWW] \
[-x XXXXXXXXXXXXXXXXXXXXXXXXX]
[-y YYYYYYYYYYYYYYYYYYYYYYYYY] \
[-z ZZZZZZZZZZZZZZZZZZZZZZZZZ]
a b c
'''
help = usage + '''\
positional arguments:
a
b
c
optional arguments:
-h, --help show this help message and exit
-w WWWWWWWWWWWWWWWWWWWWWWWWW
-x XXXXXXXXXXXXXXXXXXXXXXXXX
-y YYYYYYYYYYYYYYYYYYYYYYYYY
-z ZZZZZZZZZZZZZZZZZZZZZZZZZ
'''
version = ''
class TestHelpUsagePositionalsWrap(HelpTestCase):
"""Test usage messages where the positionals wrap"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-x'),
Sig('-y'),
Sig('-z'),
Sig('a' * 25),
Sig('b' * 25),
Sig('c' * 25),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-x X] [-y Y] [-z Z]
aaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
help = usage + '''\
positional arguments:
aaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
optional arguments:
-h, --help show this help message and exit
-x X
-y Y
-z Z
'''
version = ''
class TestHelpUsageOptionalsPositionalsWrap(HelpTestCase):
"""Test usage messages where the optionals and positionals wrap"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-x', metavar='X' * 25),
Sig('-y', metavar='Y' * 25),
Sig('-z', metavar='Z' * 25),
Sig('a' * 25),
Sig('b' * 25),
Sig('c' * 25),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-x XXXXXXXXXXXXXXXXXXXXXXXXX] \
[-y YYYYYYYYYYYYYYYYYYYYYYYYY]
[-z ZZZZZZZZZZZZZZZZZZZZZZZZZ]
aaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
help = usage + '''\
positional arguments:
aaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
optional arguments:
-h, --help show this help message and exit
-x XXXXXXXXXXXXXXXXXXXXXXXXX
-y YYYYYYYYYYYYYYYYYYYYYYYYY
-z ZZZZZZZZZZZZZZZZZZZZZZZZZ
'''
version = ''
class TestHelpUsageOptionalsOnlyWrap(HelpTestCase):
"""Test usage messages where there are only optionals and they wrap"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-x', metavar='X' * 25),
Sig('-y', metavar='Y' * 25),
Sig('-z', metavar='Z' * 25),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-x XXXXXXXXXXXXXXXXXXXXXXXXX] \
[-y YYYYYYYYYYYYYYYYYYYYYYYYY]
[-z ZZZZZZZZZZZZZZZZZZZZZZZZZ]
'''
help = usage + '''\
optional arguments:
-h, --help show this help message and exit
-x XXXXXXXXXXXXXXXXXXXXXXXXX
-y YYYYYYYYYYYYYYYYYYYYYYYYY
-z ZZZZZZZZZZZZZZZZZZZZZZZZZ
'''
version = ''
class TestHelpUsagePositionalsOnlyWrap(HelpTestCase):
"""Test usage messages where there are only positionals and they wrap"""
parser_signature = Sig(prog='PROG', add_help=False)
argument_signatures = [
Sig('a' * 25),
Sig('b' * 25),
Sig('c' * 25),
]
argument_group_signatures = []
usage = '''\
usage: PROG aaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
help = usage + '''\
positional arguments:
aaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccc
'''
version = ''
class TestHelpVariableExpansion(HelpTestCase):
"""Test that variables are expanded properly in help messages"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-x', type=int,
help='x %(prog)s %(default)s %(type)s %%'),
Sig('-y', action='store_const', default=42, const='XXX',
help='y %(prog)s %(default)s %(const)s'),
Sig('--foo', choices='abc',
help='foo %(prog)s %(default)s %(choices)s'),
Sig('--bar', default='baz', choices=[1, 2], metavar='BBB',
help='bar %(prog)s %(default)s %(dest)s'),
Sig('spam', help='spam %(prog)s %(default)s'),
Sig('badger', default=0.5, help='badger %(prog)s %(default)s'),
]
argument_group_signatures = [
(Sig('group'), [
Sig('-a', help='a %(prog)s %(default)s'),
Sig('-b', default=-1, help='b %(prog)s %(default)s'),
])
]
usage = ('''\
usage: PROG [-h] [-x X] [-y] [--foo {a,b,c}] [--bar BBB] [-a A] [-b B]
spam badger
''')
help = usage + '''\
positional arguments:
spam spam PROG None
badger badger PROG 0.5
optional arguments:
-h, --help show this help message and exit
-x X x PROG None int %
-y y PROG 42 XXX
--foo {a,b,c} foo PROG None a, b, c
--bar BBB bar PROG baz bar
group:
-a A a PROG None
-b B b PROG -1
'''
version = ''
class TestHelpVariableExpansionUsageSupplied(HelpTestCase):
"""Test that variables are expanded properly when usage= is present"""
parser_signature = Sig(prog='PROG', usage='%(prog)s FOO')
argument_signatures = []
argument_group_signatures = []
usage = ('''\
usage: PROG FOO
''')
help = usage + '''\
optional arguments:
-h, --help show this help message and exit
'''
version = ''
class TestHelpVariableExpansionNoArguments(HelpTestCase):
"""Test that variables are expanded properly with no arguments"""
parser_signature = Sig(prog='PROG', add_help=False)
argument_signatures = []
argument_group_signatures = []
usage = ('''\
usage: PROG
''')
help = usage
version = ''
class TestHelpSuppressUsage(HelpTestCase):
"""Test that items can be suppressed in usage messages"""
parser_signature = Sig(prog='PROG', usage=argparse.SUPPRESS)
argument_signatures = [
Sig('--foo', help='foo help'),
Sig('spam', help='spam help'),
]
argument_group_signatures = []
help = '''\
positional arguments:
spam spam help
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help
'''
usage = ''
version = ''
class TestHelpSuppressOptional(HelpTestCase):
"""Test that optional arguments can be suppressed in help messages"""
parser_signature = Sig(prog='PROG', add_help=False)
argument_signatures = [
Sig('--foo', help=argparse.SUPPRESS),
Sig('spam', help='spam help'),
]
argument_group_signatures = []
usage = '''\
usage: PROG spam
'''
help = usage + '''\
positional arguments:
spam spam help
'''
version = ''
class TestHelpSuppressOptionalGroup(HelpTestCase):
"""Test that optional groups can be suppressed in help messages"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('--foo', help='foo help'),
Sig('spam', help='spam help'),
]
argument_group_signatures = [
(Sig('group'), [Sig('--bar', help=argparse.SUPPRESS)]),
]
usage = '''\
usage: PROG [-h] [--foo FOO] spam
'''
help = usage + '''\
positional arguments:
spam spam help
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help
'''
version = ''
class TestHelpSuppressPositional(HelpTestCase):
"""Test that positional arguments can be suppressed in help messages"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('--foo', help='foo help'),
Sig('spam', help=argparse.SUPPRESS),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [--foo FOO]
'''
help = usage + '''\
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help
'''
version = ''
class TestHelpRequiredOptional(HelpTestCase):
"""Test that required options don't look optional"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('--foo', required=True, help='foo help'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] --foo FOO
'''
help = usage + '''\
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help
'''
version = ''
class TestHelpAlternatePrefixChars(HelpTestCase):
"""Test that options display with different prefix characters"""
parser_signature = Sig(prog='PROG', prefix_chars='^;', add_help=False)
argument_signatures = [
Sig('^^foo', action='store_true', help='foo help'),
Sig(';b', ';;bar', help='bar help'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [^^foo] [;b BAR]
'''
help = usage + '''\
optional arguments:
^^foo foo help
;b BAR, ;;bar BAR bar help
'''
version = ''
class TestHelpNoHelpOptional(HelpTestCase):
"""Test that the --help argument can be suppressed help messages"""
parser_signature = Sig(prog='PROG', add_help=False)
argument_signatures = [
Sig('--foo', help='foo help'),
Sig('spam', help='spam help'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [--foo FOO] spam
'''
help = usage + '''\
positional arguments:
spam spam help
optional arguments:
--foo FOO foo help
'''
version = ''
class TestHelpVersionOptional(HelpTestCase):
"""Test that the --version argument can be suppressed help messages"""
parser_signature = Sig(prog='PROG', version='1.0')
argument_signatures = [
Sig('--foo', help='foo help'),
Sig('spam', help='spam help'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-v] [--foo FOO] spam
'''
help = usage + '''\
positional arguments:
spam spam help
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
--foo FOO foo help
'''
version = '''\
1.0
'''
class TestHelpNone(HelpTestCase):
"""Test that no errors occur if no help is specified"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('--foo'),
Sig('spam'),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [--foo FOO] spam
'''
help = usage + '''\
positional arguments:
spam
optional arguments:
-h, --help show this help message and exit
--foo FOO
'''
version = ''
class TestHelpTupleMetavar(HelpTestCase):
"""Test specifying metavar as a tuple"""
parser_signature = Sig(prog='PROG')
argument_signatures = [
Sig('-w', help='w', nargs='+', metavar=('W1', 'W2')),
Sig('-x', help='x', nargs='*', metavar=('X1', 'X2')),
Sig('-y', help='y', nargs=3, metavar=('Y1', 'Y2', 'Y3')),
Sig('-z', help='z', nargs='?', metavar=('Z1', )),
]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-w W1 [W2 ...]] [-x [X1 [X2 ...]]] [-y Y1 Y2 Y3] \
[-z [Z1]]
'''
help = usage + '''\
optional arguments:
-h, --help show this help message and exit
-w W1 [W2 ...] w
-x [X1 [X2 ...]] x
-y Y1 Y2 Y3 y
-z [Z1] z
'''
version = ''
class TestHelpRawText(HelpTestCase):
"""Test the RawTextHelpFormatter"""
parser_signature = Sig(
prog='PROG', formatter_class=argparse.RawTextHelpFormatter,
description='Keep the formatting\n'
' exactly as it is written\n'
'\n'
'here\n')
argument_signatures = [
Sig('--foo', help=' foo help should also\n'
'appear as given here'),
Sig('spam', help='spam help'),
]
argument_group_signatures = [
(Sig('title', description=' This text\n'
' should be indented\n'
' exactly like it is here\n'),
[Sig('--bar', help='bar help')]),
]
usage = '''\
usage: PROG [-h] [--foo FOO] [--bar BAR] spam
'''
help = usage + '''\
Keep the formatting
exactly as it is written
here
positional arguments:
spam spam help
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help should also
appear as given here
title:
This text
should be indented
exactly like it is here
--bar BAR bar help
'''
version = ''
class TestHelpRawDescription(HelpTestCase):
"""Test the RawTextHelpFormatter"""
parser_signature = Sig(
prog='PROG', formatter_class=argparse.RawDescriptionHelpFormatter,
description='Keep the formatting\n'
' exactly as it is written\n'
'\n'
'here\n')
argument_signatures = [
Sig('--foo', help=' foo help should not\n'
' retain this odd formatting'),
Sig('spam', help='spam help'),
]
argument_group_signatures = [
(Sig('title', description=' This text\n'
' should be indented\n'
' exactly like it is here\n'),
[Sig('--bar', help='bar help')]),
]
usage = '''\
usage: PROG [-h] [--foo FOO] [--bar BAR] spam
'''
help = usage + '''\
Keep the formatting
exactly as it is written
here
positional arguments:
spam spam help
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help should not retain this odd formatting
title:
This text
should be indented
exactly like it is here
--bar BAR bar help
'''
version = ''
class TestHelpArgumentDefaults(HelpTestCase):
"""Test the ArgumentDefaultsHelpFormatter"""
parser_signature = Sig(
prog='PROG', formatter_class=argparse.ArgumentDefaultsHelpFormatter,
description='description')
argument_signatures = [
Sig('--foo', help='foo help - oh and by the way, %(default)s'),
Sig('--bar', action='store_true', help='bar help'),
Sig('spam', help='spam help'),
Sig('badger', nargs='?', default='wooden', help='badger help'),
]
argument_group_signatures = [
(Sig('title', description='description'),
[Sig('--baz', type=int, default=42, help='baz help')]),
]
usage = '''\
usage: PROG [-h] [--foo FOO] [--bar] [--baz BAZ] spam [badger]
'''
help = usage + '''\
description
positional arguments:
spam spam help
badger badger help (default: wooden)
optional arguments:
-h, --help show this help message and exit
--foo FOO foo help - oh and by the way, None
--bar bar help (default: False)
title:
description
--baz BAZ baz help (default: 42)
'''
version = ''
class TestHelpVersionAction(HelpTestCase):
"""Test the default help for the version action"""
parser_signature = Sig(prog='PROG', description='description')
argument_signatures = [Sig('-V', '--version', action='version', version='3.6')]
argument_group_signatures = []
usage = '''\
usage: PROG [-h] [-V]
'''
help = usage + '''\
description
optional arguments:
-h, --help show this help message and exit
-V, --version show program's version number and exit
'''
version = ''
class TestHelpSubparsersOrdering(HelpTestCase):
"""Test ordering of subcommands in help matches the code"""
parser_signature = Sig(prog='PROG',
description='display some subcommands',
version='0.1')
subparsers_signatures = [Sig(name=name)
for name in ('a', 'b', 'c', 'd', 'e')]
usage = '''\
usage: PROG [-h] [-v] {a,b,c,d,e} ...
'''
help = usage + '''\
display some subcommands
positional arguments:
{a,b,c,d,e}
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
'''
version = '''\
0.1
'''
class TestHelpSubparsersWithHelpOrdering(HelpTestCase):
"""Test ordering of subcommands in help matches the code"""
parser_signature = Sig(prog='PROG',
description='display some subcommands',
version='0.1')
subcommand_data = (('a', 'a subcommand help'),
('b', 'b subcommand help'),
('c', 'c subcommand help'),
('d', 'd subcommand help'),
('e', 'e subcommand help'),
)
subparsers_signatures = [Sig(name=name, help=help)
for name, help in subcommand_data]
usage = '''\
usage: PROG [-h] [-v] {a,b,c,d,e} ...
'''
help = usage + '''\
display some subcommands
positional arguments:
{a,b,c,d,e}
a a subcommand help
b b subcommand help
c c subcommand help
d d subcommand help
e e subcommand help
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
'''
version = '''\
0.1
'''
# =====================================
# Optional/Positional constructor tests
# =====================================
class TestInvalidArgumentConstructors(TestCase):
"""Test a bunch of invalid Argument constructors"""
def assertTypeError(self, *args, **kwargs):
parser = argparse.ArgumentParser()
self.assertRaises(TypeError, parser.add_argument,
*args, **kwargs)
def assertValueError(self, *args, **kwargs):
parser = argparse.ArgumentParser()
self.assertRaises(ValueError, parser.add_argument,
*args, **kwargs)
def test_invalid_keyword_arguments(self):
self.assertTypeError('-x', bar=None)
self.assertTypeError('-y', callback='foo')
self.assertTypeError('-y', callback_args=())
self.assertTypeError('-y', callback_kwargs={})
def test_missing_destination(self):
self.assertTypeError()
for action in ['append', 'store']:
self.assertTypeError(action=action)
def test_invalid_option_strings(self):
self.assertValueError('--')
self.assertValueError('---')
def test_invalid_type(self):
self.assertValueError('--foo', type='int')
self.assertValueError('--foo', type=(int, float))
def test_invalid_action(self):
self.assertValueError('-x', action='foo')
self.assertValueError('foo', action='baz')
self.assertValueError('--foo', action=('store', 'append'))
parser = argparse.ArgumentParser()
try:
parser.add_argument("--foo", action="store-true")
except ValueError:
e = sys.exc_info()[1]
expected = 'unknown action'
msg = 'expected %r, found %r' % (expected, e)
self.assertTrue(expected in str(e), msg)
def test_multiple_dest(self):
parser = argparse.ArgumentParser()
parser.add_argument(dest='foo')
try:
parser.add_argument('bar', dest='baz')
except ValueError:
e = sys.exc_info()[1]
expected = 'dest supplied twice for positional argument'
msg = 'expected %r, found %r' % (expected, e)
self.assertTrue(expected in str(e), msg)
def test_no_argument_actions(self):
for action in ['store_const', 'store_true', 'store_false',
'append_const', 'count']:
for attrs in [dict(type=int), dict(nargs='+'),
dict(choices='ab')]:
self.assertTypeError('-x', action=action, **attrs)
def test_no_argument_no_const_actions(self):
# options with zero arguments
for action in ['store_true', 'store_false', 'count']:
# const is always disallowed
self.assertTypeError('-x', const='foo', action=action)
# nargs is always disallowed
self.assertTypeError('-x', nargs='*', action=action)
def test_more_than_one_argument_actions(self):
for action in ['store', 'append']:
# nargs=0 is disallowed
self.assertValueError('-x', nargs=0, action=action)
self.assertValueError('spam', nargs=0, action=action)
# const is disallowed with non-optional arguments
for nargs in [1, '*', '+']:
self.assertValueError('-x', const='foo',
nargs=nargs, action=action)
self.assertValueError('spam', const='foo',
nargs=nargs, action=action)
def test_required_const_actions(self):
for action in ['store_const', 'append_const']:
# nargs is always disallowed
self.assertTypeError('-x', nargs='+', action=action)
def test_parsers_action_missing_params(self):
self.assertTypeError('command', action='parsers')
self.assertTypeError('command', action='parsers', prog='PROG')
self.assertTypeError('command', action='parsers',
parser_class=argparse.ArgumentParser)
def test_required_positional(self):
self.assertTypeError('foo', required=True)
def test_user_defined_action(self):
class Success(Exception):
pass
class Action(object):
def __init__(self,
option_strings,
dest,
const,
default,
required=False):
if dest == 'spam':
if const is Success:
if default is Success:
raise Success()
def __call__(self, *args, **kwargs):
pass
parser = argparse.ArgumentParser()
self.assertRaises(Success, parser.add_argument, '--spam',
action=Action, default=Success, const=Success)
self.assertRaises(Success, parser.add_argument, 'spam',
action=Action, default=Success, const=Success)
# ================================
# Actions returned by add_argument
# ================================
class TestActionsReturned(TestCase):
def test_dest(self):
parser = argparse.ArgumentParser()
action = parser.add_argument('--foo')
self.assertEqual(action.dest, 'foo')
action = parser.add_argument('-b', '--bar')
self.assertEqual(action.dest, 'bar')
action = parser.add_argument('-x', '-y')
self.assertEqual(action.dest, 'x')
def test_misc(self):
parser = argparse.ArgumentParser()
action = parser.add_argument('--foo', nargs='?', const=42,
default=84, type=int, choices=[1, 2],
help='FOO', metavar='BAR', dest='baz')
self.assertEqual(action.nargs, '?')
self.assertEqual(action.const, 42)
self.assertEqual(action.default, 84)
self.assertEqual(action.type, int)
self.assertEqual(action.choices, [1, 2])
self.assertEqual(action.help, 'FOO')
self.assertEqual(action.metavar, 'BAR')
self.assertEqual(action.dest, 'baz')
# ================================
# Argument conflict handling tests
# ================================
class TestConflictHandling(TestCase):
def test_bad_type(self):
self.assertRaises(ValueError, argparse.ArgumentParser,
conflict_handler='foo')
def test_conflict_error(self):
parser = argparse.ArgumentParser()
parser.add_argument('-x')
self.assertRaises(argparse.ArgumentError,
parser.add_argument, '-x')
parser.add_argument('--spam')
self.assertRaises(argparse.ArgumentError,
parser.add_argument, '--spam')
def test_resolve_error(self):
get_parser = argparse.ArgumentParser
parser = get_parser(prog='PROG', conflict_handler='resolve')
parser.add_argument('-x', help='OLD X')
parser.add_argument('-x', help='NEW X')
self.assertEqual(parser.format_help(), textwrap.dedent('''\
usage: PROG [-h] [-x X]
optional arguments:
-h, --help show this help message and exit
-x X NEW X
'''))
parser.add_argument('--spam', metavar='OLD_SPAM')
parser.add_argument('--spam', metavar='NEW_SPAM')
self.assertEqual(parser.format_help(), textwrap.dedent('''\
usage: PROG [-h] [-x X] [--spam NEW_SPAM]
optional arguments:
-h, --help show this help message and exit
-x X NEW X
--spam NEW_SPAM
'''))
# =============================
# Help and Version option tests
# =============================
class TestOptionalsHelpVersionActions(TestCase):
"""Test the help and version actions"""
def _get_error(self, func, *args, **kwargs):
try:
func(*args, **kwargs)
except ArgumentParserError:
return sys.exc_info()[1]
else:
self.assertRaises(ArgumentParserError, func, *args, **kwargs)
def assertPrintHelpExit(self, parser, args_str):
self.assertEqual(
parser.format_help(),
self._get_error(parser.parse_args, args_str.split()).stdout)
def assertPrintVersionExit(self, parser, args_str):
self.assertEqual(
parser.format_version(),
self._get_error(parser.parse_args, args_str.split()).stderr)
def assertArgumentParserError(self, parser, *args):
self.assertRaises(ArgumentParserError, parser.parse_args, args)
def test_version(self):
parser = ErrorRaisingArgumentParser(version='1.0')
self.assertPrintHelpExit(parser, '-h')
self.assertPrintHelpExit(parser, '--help')
self.assertPrintVersionExit(parser, '-v')
self.assertPrintVersionExit(parser, '--version')
def test_version_format(self):
parser = ErrorRaisingArgumentParser(prog='PPP', version='%(prog)s 3.5')
msg = self._get_error(parser.parse_args, ['-v']).stderr
self.assertEqual('PPP 3.5\n', msg)
def test_version_no_help(self):
parser = ErrorRaisingArgumentParser(add_help=False, version='1.0')
self.assertArgumentParserError(parser, '-h')
self.assertArgumentParserError(parser, '--help')
self.assertPrintVersionExit(parser, '-v')
self.assertPrintVersionExit(parser, '--version')
def test_version_action(self):
parser = ErrorRaisingArgumentParser(prog='XXX')
parser.add_argument('-V', action='version', version='%(prog)s 3.7')
msg = self._get_error(parser.parse_args, ['-V']).stderr
self.assertEqual('XXX 3.7\n', msg)
def test_no_help(self):
parser = ErrorRaisingArgumentParser(add_help=False)
self.assertArgumentParserError(parser, '-h')
self.assertArgumentParserError(parser, '--help')
self.assertArgumentParserError(parser, '-v')
self.assertArgumentParserError(parser, '--version')
def test_alternate_help_version(self):
parser = ErrorRaisingArgumentParser()
parser.add_argument('-x', action='help')
parser.add_argument('-y', action='version')
self.assertPrintHelpExit(parser, '-x')
self.assertPrintVersionExit(parser, '-y')
self.assertArgumentParserError(parser, '-v')
self.assertArgumentParserError(parser, '--version')
def test_help_version_extra_arguments(self):
parser = ErrorRaisingArgumentParser(version='1.0')
parser.add_argument('-x', action='store_true')
parser.add_argument('y')
# try all combinations of valid prefixes and suffixes
valid_prefixes = ['', '-x', 'foo', '-x bar', 'baz -x']
valid_suffixes = valid_prefixes + ['--bad-option', 'foo bar baz']
for prefix in valid_prefixes:
for suffix in valid_suffixes:
format = '%s %%s %s' % (prefix, suffix)
self.assertPrintHelpExit(parser, format % '-h')
self.assertPrintHelpExit(parser, format % '--help')
self.assertPrintVersionExit(parser, format % '-v')
self.assertPrintVersionExit(parser, format % '--version')
# ======================
# str() and repr() tests
# ======================
class TestStrings(TestCase):
"""Test str() and repr() on Optionals and Positionals"""
def assertStringEqual(self, obj, result_string):
for func in [str, repr]:
self.assertEqual(func(obj), result_string)
def test_optional(self):
option = argparse.Action(
option_strings=['--foo', '-a', '-b'],
dest='b',
type='int',
nargs='+',
default=42,
choices=[1, 2, 3],
help='HELP',
metavar='METAVAR')
string = (
"Action(option_strings=['--foo', '-a', '-b'], dest='b', "
"nargs='+', const=None, default=42, type='int', "
"choices=[1, 2, 3], help='HELP', metavar='METAVAR')")
self.assertStringEqual(option, string)
def test_argument(self):
argument = argparse.Action(
option_strings=[],
dest='x',
type=float,
nargs='?',
default=2.5,
choices=[0.5, 1.5, 2.5],
help='H HH H',
metavar='MV MV MV')
string = (
"Action(option_strings=[], dest='x', nargs='?', "
"const=None, default=2.5, type=%r, choices=[0.5, 1.5, 2.5], "
"help='H HH H', metavar='MV MV MV')" % float)
self.assertStringEqual(argument, string)
def test_namespace(self):
ns = argparse.Namespace(foo=42, bar='spam')
string = "Namespace(bar='spam', foo=42)"
self.assertStringEqual(ns, string)
def test_parser(self):
parser = argparse.ArgumentParser(prog='PROG')
string = (
"ArgumentParser(prog='PROG', usage=None, description=None, "
"version=None, formatter_class=%r, conflict_handler='error', "
"add_help=True)" % argparse.HelpFormatter)
self.assertStringEqual(parser, string)
# ===============
# Namespace tests
# ===============
class TestNamespace(TestCase):
def test_constructor(self):
ns = argparse.Namespace()
self.assertRaises(AttributeError, getattr, ns, 'x')
ns = argparse.Namespace(a=42, b='spam')
self.assertEqual(ns.a, 42)
self.assertEqual(ns.b, 'spam')
def test_equality(self):
ns1 = argparse.Namespace(a=1, b=2)
ns2 = argparse.Namespace(b=2, a=1)
ns3 = argparse.Namespace(a=1)
ns4 = argparse.Namespace(b=2)
self.assertEqual(ns1, ns2)
self.assertNotEqual(ns1, ns3)
self.assertNotEqual(ns1, ns4)
self.assertNotEqual(ns2, ns3)
self.assertNotEqual(ns2, ns4)
self.assertTrue(ns1 != ns3)
self.assertTrue(ns1 != ns4)
self.assertTrue(ns2 != ns3)
self.assertTrue(ns2 != ns4)
# ===================
# File encoding tests
# ===================
class TestEncoding(TestCase):
def _test_module_encoding(self, path):
path, _ = os.path.splitext(path)
path += ".py"
with codecs.open(path, 'r', 'utf8') as f:
f.read()
def test_argparse_module_encoding(self):
self._test_module_encoding(argparse.__file__)
def test_test_argparse_module_encoding(self):
self._test_module_encoding(__file__)
# ===================
# ArgumentError tests
# ===================
class TestArgumentError(TestCase):
def test_argument_error(self):
msg = "my error here"
error = argparse.ArgumentError(None, msg)
self.assertEqual(str(error), msg)
# =======================
# ArgumentTypeError tests
# =======================
class TestArgumentTypeError(TestCase):
def test_argument_type_error(self):
def spam(string):
raise argparse.ArgumentTypeError('spam!')
parser = ErrorRaisingArgumentParser(prog='PROG', add_help=False)
parser.add_argument('x', type=spam)
try:
parser.parse_args(['XXX'])
except ArgumentParserError:
expected = 'usage: PROG x\nPROG: error: argument x: spam!\n'
msg = sys.exc_info()[1].stderr
self.assertEqual(expected, msg)
else:
self.fail()
# ================================================
# Check that the type function is called only once
# ================================================
class TestTypeFunctionCallOnlyOnce(TestCase):
def test_type_function_call_only_once(self):
def spam(string_to_convert):
self.assertEqual(string_to_convert, 'spam!')
return 'foo_converted'
parser = argparse.ArgumentParser()
parser.add_argument('--foo', type=spam, default='bar')
args = parser.parse_args('--foo spam!'.split())
self.assertEqual(NS(foo='foo_converted'), args)
# ================================================================
# Check that the type function is called with a non-string default
# ================================================================
class TestTypeFunctionCallWithNonStringDefault(TestCase):
def test_type_function_call_with_non_string_default(self):
def spam(int_to_convert):
self.assertEqual(int_to_convert, 0)
return 'foo_converted'
parser = argparse.ArgumentParser()
parser.add_argument('--foo', type=spam, default=0)
args = parser.parse_args([])
self.assertEqual(NS(foo='foo_converted'), args)
# ======================
# parse_known_args tests
# ======================
class TestParseKnownArgs(TestCase):
def test_arguments_tuple(self):
parser = argparse.ArgumentParser()
parser.parse_args(())
def test_arguments_list(self):
parser = argparse.ArgumentParser()
parser.parse_args([])
def test_arguments_tuple_positional(self):
parser = argparse.ArgumentParser()
parser.add_argument('x')
parser.parse_args(('x',))
def test_arguments_list_positional(self):
parser = argparse.ArgumentParser()
parser.add_argument('x')
parser.parse_args(['x'])
def test_optionals(self):
parser = argparse.ArgumentParser()
parser.add_argument('--foo')
args, extras = parser.parse_known_args('--foo F --bar --baz'.split())
self.assertEqual(NS(foo='F'), args)
self.assertEqual(['--bar', '--baz'], extras)
def test_mixed(self):
parser = argparse.ArgumentParser()
parser.add_argument('-v', nargs='?', const=1, type=int)
parser.add_argument('--spam', action='store_false')
parser.add_argument('badger')
argv = ["B", "C", "--foo", "-v", "3", "4"]
args, extras = parser.parse_known_args(argv)
self.assertEqual(NS(v=3, spam=True, badger="B"), args)
self.assertEqual(["C", "--foo", "4"], extras)
# ==========================
# add_argument metavar tests
# ==========================
class TestAddArgumentMetavar(TestCase):
EXPECTED_MESSAGE = "length of metavar tuple does not match nargs"
def do_test_no_exception(self, nargs, metavar):
parser = argparse.ArgumentParser()
parser.add_argument("--foo", nargs=nargs, metavar=metavar)
def do_test_exception(self, nargs, metavar):
parser = argparse.ArgumentParser()
with self.assertRaises(ValueError) as cm:
parser.add_argument("--foo", nargs=nargs, metavar=metavar)
self.assertEqual(cm.exception.args[0], self.EXPECTED_MESSAGE)
# Unit tests for different values of metavar when nargs=None
def test_nargs_None_metavar_string(self):
self.do_test_no_exception(nargs=None, metavar="1")
def test_nargs_None_metavar_length0(self):
self.do_test_exception(nargs=None, metavar=tuple())
def test_nargs_None_metavar_length1(self):
self.do_test_no_exception(nargs=None, metavar=("1"))
def test_nargs_None_metavar_length2(self):
self.do_test_exception(nargs=None, metavar=("1", "2"))
def test_nargs_None_metavar_length3(self):
self.do_test_exception(nargs=None, metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=?
def test_nargs_optional_metavar_string(self):
self.do_test_no_exception(nargs="?", metavar="1")
def test_nargs_optional_metavar_length0(self):
self.do_test_exception(nargs="?", metavar=tuple())
def test_nargs_optional_metavar_length1(self):
self.do_test_no_exception(nargs="?", metavar=("1"))
def test_nargs_optional_metavar_length2(self):
self.do_test_exception(nargs="?", metavar=("1", "2"))
def test_nargs_optional_metavar_length3(self):
self.do_test_exception(nargs="?", metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=*
def test_nargs_zeroormore_metavar_string(self):
self.do_test_no_exception(nargs="*", metavar="1")
def test_nargs_zeroormore_metavar_length0(self):
self.do_test_exception(nargs="*", metavar=tuple())
def test_nargs_zeroormore_metavar_length1(self):
self.do_test_no_exception(nargs="*", metavar=("1"))
def test_nargs_zeroormore_metavar_length2(self):
self.do_test_no_exception(nargs="*", metavar=("1", "2"))
def test_nargs_zeroormore_metavar_length3(self):
self.do_test_exception(nargs="*", metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=+
def test_nargs_oneormore_metavar_string(self):
self.do_test_no_exception(nargs="+", metavar="1")
def test_nargs_oneormore_metavar_length0(self):
self.do_test_exception(nargs="+", metavar=tuple())
def test_nargs_oneormore_metavar_length1(self):
self.do_test_no_exception(nargs="+", metavar=("1"))
def test_nargs_oneormore_metavar_length2(self):
self.do_test_no_exception(nargs="+", metavar=("1", "2"))
def test_nargs_oneormore_metavar_length3(self):
self.do_test_exception(nargs="+", metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=...
def test_nargs_remainder_metavar_string(self):
self.do_test_no_exception(nargs="...", metavar="1")
def test_nargs_remainder_metavar_length0(self):
self.do_test_no_exception(nargs="...", metavar=tuple())
def test_nargs_remainder_metavar_length1(self):
self.do_test_no_exception(nargs="...", metavar=("1"))
def test_nargs_remainder_metavar_length2(self):
self.do_test_no_exception(nargs="...", metavar=("1", "2"))
def test_nargs_remainder_metavar_length3(self):
self.do_test_no_exception(nargs="...", metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=A...
def test_nargs_parser_metavar_string(self):
self.do_test_no_exception(nargs="A...", metavar="1")
def test_nargs_parser_metavar_length0(self):
self.do_test_exception(nargs="A...", metavar=tuple())
def test_nargs_parser_metavar_length1(self):
self.do_test_no_exception(nargs="A...", metavar=("1"))
def test_nargs_parser_metavar_length2(self):
self.do_test_exception(nargs="A...", metavar=("1", "2"))
def test_nargs_parser_metavar_length3(self):
self.do_test_exception(nargs="A...", metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=1
def test_nargs_1_metavar_string(self):
self.do_test_no_exception(nargs=1, metavar="1")
def test_nargs_1_metavar_length0(self):
self.do_test_exception(nargs=1, metavar=tuple())
def test_nargs_1_metavar_length1(self):
self.do_test_no_exception(nargs=1, metavar=("1"))
def test_nargs_1_metavar_length2(self):
self.do_test_exception(nargs=1, metavar=("1", "2"))
def test_nargs_1_metavar_length3(self):
self.do_test_exception(nargs=1, metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=2
def test_nargs_2_metavar_string(self):
self.do_test_no_exception(nargs=2, metavar="1")
def test_nargs_2_metavar_length0(self):
self.do_test_exception(nargs=2, metavar=tuple())
def test_nargs_2_metavar_length1(self):
self.do_test_no_exception(nargs=2, metavar=("1"))
def test_nargs_2_metavar_length2(self):
self.do_test_no_exception(nargs=2, metavar=("1", "2"))
def test_nargs_2_metavar_length3(self):
self.do_test_exception(nargs=2, metavar=("1", "2", "3"))
# Unit tests for different values of metavar when nargs=3
def test_nargs_3_metavar_string(self):
self.do_test_no_exception(nargs=3, metavar="1")
def test_nargs_3_metavar_length0(self):
self.do_test_exception(nargs=3, metavar=tuple())
def test_nargs_3_metavar_length1(self):
self.do_test_no_exception(nargs=3, metavar=("1"))
def test_nargs_3_metavar_length2(self):
self.do_test_exception(nargs=3, metavar=("1", "2"))
def test_nargs_3_metavar_length3(self):
self.do_test_no_exception(nargs=3, metavar=("1", "2", "3"))
# ============================
# from argparse import * tests
# ============================
class TestImportStar(TestCase):
def test(self):
for name in argparse.__all__:
self.assertTrue(hasattr(argparse, name))
def test_all_exports_everything_but_modules(self):
items = [
name
for name, value in vars(argparse).items()
if not (name.startswith("_") or name == 'ngettext')
if not inspect.ismodule(value)
]
self.assertEqual(sorted(items), sorted(argparse.__all__))
def test_main():
# silence warnings about version argument - these are expected
with support.check_warnings(
('The "version" argument to ArgumentParser is deprecated.',
DeprecationWarning),
('The (format|print)_version method is deprecated',
DeprecationWarning)):
support.run_unittest(__name__)
# Remove global references to avoid looking like we have refleaks.
RFile.seen = {}
WFile.seen = set()
if __name__ == '__main__':
test_main()
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