cpython/Tools/clinic/clinic_test.py

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#!/usr/bin/env python3
#
# Argument Clinic
# Copyright 2012-2013 by Larry Hastings.
# Licensed to the PSF under a contributor agreement.
#
import builtins
import clinic
from clinic import DSLParser
import collections
import inspect
from test import support
import unittest
from unittest import TestCase
class FakeConverter:
def __init__(self, name, args):
self.name = name
self.args = args
class FakeConverterFactory:
def __init__(self, name):
self.name = name
def __call__(self, name, default, **kwargs):
return FakeConverter(self.name, kwargs)
class FakeConvertersDict:
def __init__(self):
self.used_converters = {}
def get(self, name, default):
return self.used_converters.setdefault(name, FakeConverterFactory(name))
class FakeClinic:
def __init__(self):
self.converters = FakeConvertersDict()
self.legacy_converters = FakeConvertersDict()
self.language = clinic.CLanguage()
self.filename = None
self.block_parser = clinic.BlockParser('', self.language)
self.modules = collections.OrderedDict()
clinic.clinic = self
self.name = "FakeClinic"
def is_directive(self, name):
return name == "module"
def directive(self, name, args):
self.called_directives[name] = args
_module_and_class = clinic.Clinic._module_and_class
class ClinicGroupPermuterTest(TestCase):
def _test(self, l, m, r, output):
computed = clinic.permute_optional_groups(l, m, r)
self.assertEqual(output, computed)
def test_range(self):
self._test([['start']], ['stop'], [['step']],
(
('stop',),
('start', 'stop',),
('start', 'stop', 'step',),
))
def test_add_window(self):
self._test([['x', 'y']], ['ch'], [['attr']],
(
('ch',),
('ch', 'attr'),
('x', 'y', 'ch',),
('x', 'y', 'ch', 'attr'),
))
def test_ludicrous(self):
self._test([['a1', 'a2', 'a3'], ['b1', 'b2']], ['c1'], [['d1', 'd2'], ['e1', 'e2', 'e3']],
(
('c1',),
('b1', 'b2', 'c1'),
('b1', 'b2', 'c1', 'd1', 'd2'),
('a1', 'a2', 'a3', 'b1', 'b2', 'c1'),
('a1', 'a2', 'a3', 'b1', 'b2', 'c1', 'd1', 'd2'),
('a1', 'a2', 'a3', 'b1', 'b2', 'c1', 'd1', 'd2', 'e1', 'e2', 'e3'),
))
def test_right_only(self):
self._test([], [], [['a'],['b'],['c']],
(
(),
('a',),
('a', 'b'),
('a', 'b', 'c')
))
def test_have_left_options_but_required_is_empty(self):
def fn():
clinic.permute_optional_groups(['a'], [], [])
self.assertRaises(AssertionError, fn)
class ClinicLinearFormatTest(TestCase):
def _test(self, input, output, **kwargs):
computed = clinic.linear_format(input, **kwargs)
self.assertEqual(output, computed)
def test_empty_strings(self):
self._test('', '')
def test_solo_newline(self):
self._test('\n', '\n')
def test_no_substitution(self):
self._test("""
abc
""", """
abc
""")
def test_empty_substitution(self):
self._test("""
abc
{name}
def
""", """
abc
def
""", name='')
def test_single_line_substitution(self):
self._test("""
abc
{name}
def
""", """
abc
GARGLE
def
""", name='GARGLE')
def test_multiline_substitution(self):
self._test("""
abc
{name}
def
""", """
abc
bingle
bungle
def
""", name='bingle\nbungle\n')
class InertParser:
def __init__(self, clinic):
pass
def parse(self, block):
pass
class CopyParser:
def __init__(self, clinic):
pass
def parse(self, block):
block.output = block.input
class ClinicBlockParserTest(TestCase):
def _test(self, input, output):
language = clinic.CLanguage()
blocks = list(clinic.BlockParser(input, language))
writer = clinic.BlockPrinter(language)
for block in blocks:
writer.print_block(block)
output = writer.f.getvalue()
assert output == input, "output != input!\n\noutput " + repr(output) + "\n\n input " + repr(input)
def round_trip(self, input):
return self._test(input, input)
def test_round_trip_1(self):
self.round_trip("""
verbatim text here
lah dee dah
""")
def test_round_trip_2(self):
self.round_trip("""
verbatim text here
lah dee dah
/*[inert]
abc
[inert]*/
def
/*[inert checksum: 7b18d017f89f61cf17d47f92749ea6930a3f1deb]*/
xyz
""")
def _test_clinic(self, input, output):
language = clinic.CLanguage()
c = clinic.Clinic(language)
c.parsers['inert'] = InertParser(c)
c.parsers['copy'] = CopyParser(c)
computed = c.parse(input)
self.assertEqual(output, computed)
def test_clinic_1(self):
self._test_clinic("""
verbatim text here
lah dee dah
/*[copy]
def
[copy]*/
abc
/*[copy checksum: 03cfd743661f07975fa2f1220c5194cbaff48451]*/
xyz
""", """
verbatim text here
lah dee dah
/*[copy]
def
[copy]*/
def
/*[copy checksum: 7b18d017f89f61cf17d47f92749ea6930a3f1deb]*/
xyz
""")
class ClinicParserTest(TestCase):
def test_trivial(self):
parser = DSLParser(FakeClinic())
block = clinic.Block("module os\nos.access")
parser.parse(block)
module, function = block.signatures
self.assertEqual("access", function.name)
self.assertEqual("os", module.name)
def test_ignore_line(self):
block = self.parse("#\nmodule os\nos.access")
module, function = block.signatures
self.assertEqual("access", function.name)
self.assertEqual("os", module.name)
def test_param(self):
function = self.parse_function("module os\nos.access\n path: int")
self.assertEqual("access", function.name)
self.assertEqual(1, len(function.parameters))
p = function.parameters['path']
self.assertEqual('path', p.name)
self.assertIsInstance(p.converter, clinic.int_converter)
def test_param_default(self):
function = self.parse_function("module os\nos.access\n follow_symlinks: bool = True")
p = function.parameters['follow_symlinks']
self.assertEqual(True, p.default)
def test_param_no_docstring(self):
function = self.parse_function("""
module os
os.access
follow_symlinks: bool = True
something_else: str""")
p = function.parameters['follow_symlinks']
self.assertEqual(2, len(function.parameters))
self.assertIsInstance(function.parameters['something_else'].converter, clinic.str_converter)
def disabled_test_converter_arguments(self):
function = self.parse_function("module os\nos.access\n path: path_t(allow_fd=1)")
p = function.parameters['path']
self.assertEqual(1, p.converter.args['allow_fd'])
def test_param_docstring(self):
function = self.parse_function("""
module os
os.stat as os_stat_fn -> object(doc_default='stat_result')
path: str
Path to be examined""")
p = function.parameters['path']
self.assertEqual("Path to be examined", p.docstring)
self.assertEqual(function.return_converter.doc_default, 'stat_result')
def test_function_docstring(self):
function = self.parse_function("""
module os
os.stat as os_stat_fn
path: str
Path to be examined
Perform a stat system call on the given path.""")
self.assertEqual("""
Perform a stat system call on the given path.
os.stat(path)
path
Path to be examined
""".strip(), function.docstring)
def test_explicit_parameters_in_docstring(self):
function = self.parse_function("""
module foo
foo.bar
x: int
Documentation for x.
y: int
This is the documentation for foo.
Okay, we're done here.
""")
self.assertEqual("""
This is the documentation for foo.
foo.bar(x, y)
x
Documentation for x.
Okay, we're done here.
""".strip(), function.docstring)
def test_parser_regression_special_character_in_parameter_column_of_docstring_first_line(self):
function = self.parse_function("""
module os
os.stat
path: str
This/used to break Clinic!
""")
self.assertEqual("os.stat(path)\n\nThis/used to break Clinic!", function.docstring)
def test_c_name(self):
function = self.parse_function("module os\nos.stat as os_stat_fn")
self.assertEqual("os_stat_fn", function.c_basename)
def test_return_converter(self):
function = self.parse_function("module os\nos.stat -> int")
self.assertIsInstance(function.return_converter, clinic.int_return_converter)
def test_star(self):
function = self.parse_function("module os\nos.access\n *\n follow_symlinks: bool = True")
p = function.parameters['follow_symlinks']
self.assertEqual(inspect.Parameter.KEYWORD_ONLY, p.kind)
self.assertEqual(0, p.group)
def test_group(self):
function = self.parse_function("module window\nwindow.border\n [\n ls : int\n ]\n /\n")
p = function.parameters['ls']
self.assertEqual(1, p.group)
def test_left_group(self):
function = self.parse_function("""
module curses
curses.window.addch
[
y: int
Y-coordinate.
x: int
X-coordinate.
]
ch: char
Character to add.
[
attr: long
Attributes for the character.
]
/
""")
for name, group in (
('y', -1), ('x', -1),
('ch', 0),
('attr', 1),
):
p = function.parameters[name]
self.assertEqual(p.group, group)
self.assertEqual(p.kind, inspect.Parameter.POSITIONAL_ONLY)
self.assertEqual(function.docstring.strip(), """
curses.window.addch([y, x,] ch, [attr])
y
Y-coordinate.
x
X-coordinate.
ch
Character to add.
attr
Attributes for the character.
""".strip())
def test_nested_groups(self):
function = self.parse_function("""
module curses
curses.window.imaginary
[
[
y1: int
Y-coordinate.
y2: int
Y-coordinate.
]
x1: int
X-coordinate.
x2: int
X-coordinate.
]
ch: char
Character to add.
[
attr1: long
Attributes for the character.
attr2: long
Attributes for the character.
attr3: long
Attributes for the character.
[
attr4: long
Attributes for the character.
attr5: long
Attributes for the character.
attr6: long
Attributes for the character.
]
]
/
""")
for name, group in (
('y1', -2), ('y2', -2),
('x1', -1), ('x2', -1),
('ch', 0),
('attr1', 1), ('attr2', 1), ('attr3', 1),
('attr4', 2), ('attr5', 2), ('attr6', 2),
):
p = function.parameters[name]
self.assertEqual(p.group, group)
self.assertEqual(p.kind, inspect.Parameter.POSITIONAL_ONLY)
self.assertEqual(function.docstring.strip(), """
curses.window.imaginary([[y1, y2,] x1, x2,] ch, [attr1, attr2, attr3, [attr4, attr5, attr6]])
y1
Y-coordinate.
y2
Y-coordinate.
x1
X-coordinate.
x2
X-coordinate.
ch
Character to add.
attr1
Attributes for the character.
attr2
Attributes for the character.
attr3
Attributes for the character.
attr4
Attributes for the character.
attr5
Attributes for the character.
attr6
Attributes for the character.
""".strip())
def parse_function_should_fail(self, s):
with support.captured_stdout() as stdout:
with self.assertRaises(SystemExit):
self.parse_function(s)
return stdout.getvalue()
def test_disallowed_grouping__two_top_groups_on_left(self):
s = self.parse_function_should_fail("""
module foo
foo.two_top_groups_on_left
[
group1 : int
]
[
group2 : int
]
param: int
""")
self.assertEqual(s,
('Error on line 0:\n'
'Function two_top_groups_on_left has an unsupported group configuration. (Unexpected state 2)\n'))
def test_disallowed_grouping__two_top_groups_on_right(self):
self.parse_function_should_fail("""
module foo
foo.two_top_groups_on_right
param: int
[
group1 : int
]
[
group2 : int
]
""")
def test_disallowed_grouping__parameter_after_group_on_right(self):
self.parse_function_should_fail("""
module foo
foo.parameter_after_group_on_right
param: int
[
[
group1 : int
]
group2 : int
]
""")
def test_disallowed_grouping__group_after_parameter_on_left(self):
self.parse_function_should_fail("""
module foo
foo.group_after_parameter_on_left
[
group2 : int
[
group1 : int
]
]
param: int
""")
def test_disallowed_grouping__empty_group_on_left(self):
self.parse_function_should_fail("""
module foo
foo.empty_group
[
[
]
group2 : int
]
param: int
""")
def test_disallowed_grouping__empty_group_on_right(self):
self.parse_function_should_fail("""
module foo
foo.empty_group
param: int
[
[
]
group2 : int
]
""")
def test_no_parameters(self):
function = self.parse_function("""
module foo
foo.bar
Docstring
""")
self.assertEqual("Docstring\n\nfoo.bar()", function.docstring)
self.assertEqual(0, len(function.parameters))
def test_single_star(self):
self.parse_function_should_fail("""
module foo
foo.bar
*
*
""")
def test_parameters_required_after_star_without_initial_parameters_or_docstring(self):
self.parse_function_should_fail("""
module foo
foo.bar
*
""")
def test_parameters_required_after_star_without_initial_parameters_with_docstring(self):
self.parse_function_should_fail("""
module foo
foo.bar
*
Docstring here.
""")
def test_parameters_required_after_star_with_initial_parameters_without_docstring(self):
self.parse_function_should_fail("""
module foo
foo.bar
this: int
*
""")
def test_parameters_required_after_star_with_initial_parameters_and_docstring(self):
self.parse_function_should_fail("""
module foo
foo.bar
this: int
*
Docstring.
""")
def test_single_slash(self):
self.parse_function_should_fail("""
module foo
foo.bar
/
/
""")
def test_mix_star_and_slash(self):
self.parse_function_should_fail("""
module foo
foo.bar
x: int
y: int
*
z: int
/
""")
def test_parameters_not_permitted_after_slash_for_now(self):
self.parse_function_should_fail("""
module foo
foo.bar
/
x: int
""")
def test_function_not_at_column_0(self):
function = self.parse_function("""
module foo
foo.bar
x: int
Nested docstring here, goeth.
*
y: str
Not at column 0!
""")
self.assertEqual("""
Not at column 0!
foo.bar(x, *, y)
x
Nested docstring here, goeth.
""".strip(), function.docstring)
def test_parser_regression_special_character_in_parameter_column_of_docstring_first_line(self):
function = self.parse_function("""
module os
os.stat
path: str
This/used to break Clinic!
""")
self.assertEqual("This/used to break Clinic!\n\nos.stat(path)", function.docstring)
def test_directive(self):
c = FakeClinic()
parser = DSLParser(c)
parser.flag = False
parser.directives['setflag'] = lambda : setattr(parser, 'flag', True)
block = clinic.Block("setflag")
parser.parse(block)
self.assertTrue(parser.flag)
def test_legacy_converters(self):
block = self.parse('module os\nos.access\n path: "s"')
module, function = block.signatures
self.assertIsInstance((function.parameters['path']).converter, clinic.str_converter)
def parse(self, text):
c = FakeClinic()
parser = DSLParser(c)
block = clinic.Block(text)
parser.parse(block)
return block
def parse_function(self, text):
block = self.parse(text)
s = block.signatures
assert len(s) == 2
assert isinstance(s[0], clinic.Module)
assert isinstance(s[1], clinic.Function)
return s[1]
def test_scaffolding(self):
# test repr on special values
self.assertEqual(repr(clinic.unspecified), '<Unspecified>')
self.assertEqual(repr(clinic.NULL), '<Null>')
# test that fail fails
with support.captured_stdout() as stdout:
with self.assertRaises(SystemExit):
clinic.fail('The igloos are melting!', filename='clown.txt', line_number=69)
self.assertEqual(stdout.getvalue(), 'Error in file "clown.txt" on line 69:\nThe igloos are melting!\n')
if __name__ == "__main__":
unittest.main()