mirror of https://github.com/python/cpython
272 lines
6.8 KiB
Python
272 lines
6.8 KiB
Python
import unittest
|
|
import test.support
|
|
import io
|
|
import os
|
|
import tokenize
|
|
import ast
|
|
import unparse
|
|
|
|
def read_pyfile(filename):
|
|
"""Read and return the contents of a Python source file (as a
|
|
string), taking into account the file encoding."""
|
|
with open(filename, "rb") as pyfile:
|
|
encoding = tokenize.detect_encoding(pyfile.readline)[0]
|
|
with open(filename, "r", encoding=encoding) as pyfile:
|
|
source = pyfile.read()
|
|
return source
|
|
|
|
for_else = """\
|
|
def f():
|
|
for x in range(10):
|
|
break
|
|
else:
|
|
y = 2
|
|
z = 3
|
|
"""
|
|
|
|
while_else = """\
|
|
def g():
|
|
while True:
|
|
break
|
|
else:
|
|
y = 2
|
|
z = 3
|
|
"""
|
|
|
|
relative_import = """\
|
|
from . import fred
|
|
from .. import barney
|
|
from .australia import shrimp as prawns
|
|
"""
|
|
|
|
nonlocal_ex = """\
|
|
def f():
|
|
x = 1
|
|
def g():
|
|
nonlocal x
|
|
x = 2
|
|
y = 7
|
|
def h():
|
|
nonlocal x, y
|
|
"""
|
|
|
|
# also acts as test for 'except ... as ...'
|
|
raise_from = """\
|
|
try:
|
|
1 / 0
|
|
except ZeroDivisionError as e:
|
|
raise ArithmeticError from e
|
|
"""
|
|
|
|
class_decorator = """\
|
|
@f1(arg)
|
|
@f2
|
|
class Foo: pass
|
|
"""
|
|
|
|
elif1 = """\
|
|
if cond1:
|
|
suite1
|
|
elif cond2:
|
|
suite2
|
|
else:
|
|
suite3
|
|
"""
|
|
|
|
elif2 = """\
|
|
if cond1:
|
|
suite1
|
|
elif cond2:
|
|
suite2
|
|
"""
|
|
|
|
try_except_finally = """\
|
|
try:
|
|
suite1
|
|
except ex1:
|
|
suite2
|
|
except ex2:
|
|
suite3
|
|
else:
|
|
suite4
|
|
finally:
|
|
suite5
|
|
"""
|
|
|
|
with_simple = """\
|
|
with f():
|
|
suite1
|
|
"""
|
|
|
|
with_as = """\
|
|
with f() as x:
|
|
suite1
|
|
"""
|
|
|
|
with_two_items = """\
|
|
with f() as x, g() as y:
|
|
suite1
|
|
"""
|
|
|
|
class ASTTestCase(unittest.TestCase):
|
|
def assertASTEqual(self, ast1, ast2):
|
|
self.assertEqual(ast.dump(ast1), ast.dump(ast2))
|
|
|
|
def check_roundtrip(self, code1, filename="internal"):
|
|
ast1 = compile(code1, filename, "exec", ast.PyCF_ONLY_AST)
|
|
unparse_buffer = io.StringIO()
|
|
unparse.Unparser(ast1, unparse_buffer)
|
|
code2 = unparse_buffer.getvalue()
|
|
ast2 = compile(code2, filename, "exec", ast.PyCF_ONLY_AST)
|
|
self.assertASTEqual(ast1, ast2)
|
|
|
|
class UnparseTestCase(ASTTestCase):
|
|
# Tests for specific bugs found in earlier versions of unparse
|
|
|
|
def test_del_statement(self):
|
|
self.check_roundtrip("del x, y, z")
|
|
|
|
def test_shifts(self):
|
|
self.check_roundtrip("45 << 2")
|
|
self.check_roundtrip("13 >> 7")
|
|
|
|
def test_for_else(self):
|
|
self.check_roundtrip(for_else)
|
|
|
|
def test_while_else(self):
|
|
self.check_roundtrip(while_else)
|
|
|
|
def test_unary_parens(self):
|
|
self.check_roundtrip("(-1)**7")
|
|
self.check_roundtrip("(-1.)**8")
|
|
self.check_roundtrip("(-1j)**6")
|
|
self.check_roundtrip("not True or False")
|
|
self.check_roundtrip("True or not False")
|
|
|
|
def test_integer_parens(self):
|
|
self.check_roundtrip("3 .__abs__()")
|
|
|
|
def test_huge_float(self):
|
|
self.check_roundtrip("1e1000")
|
|
self.check_roundtrip("-1e1000")
|
|
self.check_roundtrip("1e1000j")
|
|
self.check_roundtrip("-1e1000j")
|
|
|
|
def test_min_int(self):
|
|
self.check_roundtrip(str(-2**31))
|
|
self.check_roundtrip(str(-2**63))
|
|
|
|
def test_imaginary_literals(self):
|
|
self.check_roundtrip("7j")
|
|
self.check_roundtrip("-7j")
|
|
self.check_roundtrip("0j")
|
|
self.check_roundtrip("-0j")
|
|
|
|
def test_lambda_parentheses(self):
|
|
self.check_roundtrip("(lambda: int)()")
|
|
|
|
def test_chained_comparisons(self):
|
|
self.check_roundtrip("1 < 4 <= 5")
|
|
self.check_roundtrip("a is b is c is not d")
|
|
|
|
def test_function_arguments(self):
|
|
self.check_roundtrip("def f(): pass")
|
|
self.check_roundtrip("def f(a): pass")
|
|
self.check_roundtrip("def f(b = 2): pass")
|
|
self.check_roundtrip("def f(a, b): pass")
|
|
self.check_roundtrip("def f(a, b = 2): pass")
|
|
self.check_roundtrip("def f(a = 5, b = 2): pass")
|
|
self.check_roundtrip("def f(*, a = 1, b = 2): pass")
|
|
self.check_roundtrip("def f(*, a = 1, b): pass")
|
|
self.check_roundtrip("def f(*, a, b = 2): pass")
|
|
self.check_roundtrip("def f(a, b = None, *, c, **kwds): pass")
|
|
self.check_roundtrip("def f(a=2, *args, c=5, d, **kwds): pass")
|
|
self.check_roundtrip("def f(*args, **kwargs): pass")
|
|
|
|
def test_relative_import(self):
|
|
self.check_roundtrip(relative_import)
|
|
|
|
def test_nonlocal(self):
|
|
self.check_roundtrip(nonlocal_ex)
|
|
|
|
def test_raise_from(self):
|
|
self.check_roundtrip(raise_from)
|
|
|
|
def test_bytes(self):
|
|
self.check_roundtrip("b'123'")
|
|
|
|
def test_annotations(self):
|
|
self.check_roundtrip("def f(a : int): pass")
|
|
self.check_roundtrip("def f(a: int = 5): pass")
|
|
self.check_roundtrip("def f(*args: [int]): pass")
|
|
self.check_roundtrip("def f(**kwargs: dict): pass")
|
|
self.check_roundtrip("def f() -> None: pass")
|
|
|
|
def test_set_literal(self):
|
|
self.check_roundtrip("{'a', 'b', 'c'}")
|
|
|
|
def test_set_comprehension(self):
|
|
self.check_roundtrip("{x for x in range(5)}")
|
|
|
|
def test_dict_comprehension(self):
|
|
self.check_roundtrip("{x: x*x for x in range(10)}")
|
|
|
|
def test_class_decorators(self):
|
|
self.check_roundtrip(class_decorator)
|
|
|
|
def test_class_definition(self):
|
|
self.check_roundtrip("class A(metaclass=type, *[], **{}): pass")
|
|
|
|
def test_elifs(self):
|
|
self.check_roundtrip(elif1)
|
|
self.check_roundtrip(elif2)
|
|
|
|
def test_try_except_finally(self):
|
|
self.check_roundtrip(try_except_finally)
|
|
|
|
def test_starred_assignment(self):
|
|
self.check_roundtrip("a, *b, c = seq")
|
|
self.check_roundtrip("a, (*b, c) = seq")
|
|
self.check_roundtrip("a, *b[0], c = seq")
|
|
self.check_roundtrip("a, *(b, c) = seq")
|
|
|
|
def test_with_simple(self):
|
|
self.check_roundtrip(with_simple)
|
|
|
|
def test_with_as(self):
|
|
self.check_roundtrip(with_as)
|
|
|
|
def test_with_two_items(self):
|
|
self.check_roundtrip(with_two_items)
|
|
|
|
|
|
class DirectoryTestCase(ASTTestCase):
|
|
"""Test roundtrip behaviour on all files in Lib and Lib/test."""
|
|
|
|
# test directories, relative to the root of the distribution
|
|
test_directories = 'Lib', os.path.join('Lib', 'test')
|
|
|
|
def test_files(self):
|
|
# get names of files to test
|
|
dist_dir = os.path.join(os.path.dirname(__file__), os.pardir, os.pardir)
|
|
|
|
names = []
|
|
for d in self.test_directories:
|
|
test_dir = os.path.join(dist_dir, d)
|
|
for n in os.listdir(test_dir):
|
|
if n.endswith('.py') and not n.startswith('bad'):
|
|
names.append(os.path.join(test_dir, n))
|
|
|
|
for filename in names:
|
|
if test.support.verbose:
|
|
print('Testing %s' % filename)
|
|
source = read_pyfile(filename)
|
|
self.check_roundtrip(source)
|
|
|
|
|
|
def test_main():
|
|
test.support.run_unittest(UnparseTestCase, DirectoryTestCase)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|