How to use roundtrip method in localstack

Best Python code snippet using localstack_python

test_unparse.py

Source:test_unparse.py

...102"""103class ASTTestCase(unittest.TestCase):104    def assertASTEqual(self, ast1, ast2):105        self.assertEqual(ast.dump(ast1), ast.dump(ast2))106    def check_roundtrip(self, code1, filename="internal"):107        ast1 = compile(code1, filename, "exec", ast.PyCF_ONLY_AST)108        unparse_buffer = io.StringIO()109        unparse.Unparser(ast1, unparse_buffer)110        code2 = unparse_buffer.getvalue()111        ast2 = compile(code2, filename, "exec", ast.PyCF_ONLY_AST)112        self.assertASTEqual(ast1, ast2)113class UnparseTestCase(ASTTestCase):114    # Tests for specific bugs found in earlier versions of unparse115    def test_fstrings(self):116        # See issue 25180117        self.check_roundtrip(r"""f'{f"{0}"*3}'""")118        self.check_roundtrip(r"""f'{f"{y}"*3}'""")119    def test_del_statement(self):120        self.check_roundtrip("del x, y, z")121    def test_shifts(self):122        self.check_roundtrip("45 << 2")123        self.check_roundtrip("13 >> 7")124    def test_for_else(self):125        self.check_roundtrip(for_else)126    def test_while_else(self):127        self.check_roundtrip(while_else)128    def test_unary_parens(self):129        self.check_roundtrip("(-1)**7")130        self.check_roundtrip("(-1.)**8")131        self.check_roundtrip("(-1j)**6")132        self.check_roundtrip("not True or False")133        self.check_roundtrip("True or not False")134    def test_integer_parens(self):135        self.check_roundtrip("3 .__abs__()")136    def test_huge_float(self):137        self.check_roundtrip("1e1000")138        self.check_roundtrip("-1e1000")139        self.check_roundtrip("1e1000j")140        self.check_roundtrip("-1e1000j")141    def test_min_int(self):142        self.check_roundtrip(str(-2**31))143        self.check_roundtrip(str(-2**63))144    def test_imaginary_literals(self):145        self.check_roundtrip("7j")146        self.check_roundtrip("-7j")147        self.check_roundtrip("0j")148        self.check_roundtrip("-0j")149    def test_lambda_parentheses(self):150        self.check_roundtrip("(lambda: int)()")151    def test_chained_comparisons(self):152        self.check_roundtrip("1 < 4 <= 5")153        self.check_roundtrip("a is b is c is not d")154    def test_function_arguments(self):155        self.check_roundtrip("def f(): pass")156        self.check_roundtrip("def f(a): pass")157        self.check_roundtrip("def f(b = 2): pass")158        self.check_roundtrip("def f(a, b): pass")159        self.check_roundtrip("def f(a, b = 2): pass")160        self.check_roundtrip("def f(a = 5, b = 2): pass")161        self.check_roundtrip("def f(*, a = 1, b = 2): pass")162        self.check_roundtrip("def f(*, a = 1, b): pass")163        self.check_roundtrip("def f(*, a, b = 2): pass")164        self.check_roundtrip("def f(a, b = None, *, c, **kwds): pass")165        self.check_roundtrip("def f(a=2, *args, c=5, d, **kwds): pass")166        self.check_roundtrip("def f(*args, **kwargs): pass")167    def test_relative_import(self):168        self.check_roundtrip(relative_import)169    def test_nonlocal(self):170        self.check_roundtrip(nonlocal_ex)171    def test_raise_from(self):172        self.check_roundtrip(raise_from)173    def test_bytes(self):174        self.check_roundtrip("b'123'")175    def test_annotations(self):176        self.check_roundtrip("def f(a : int): pass")177        self.check_roundtrip("def f(a: int = 5): pass")178        self.check_roundtrip("def f(*args: [int]): pass")179        self.check_roundtrip("def f(**kwargs: dict): pass")180        self.check_roundtrip("def f() -> None: pass")181    def test_set_literal(self):182        self.check_roundtrip("{'a', 'b', 'c'}")183    def test_set_comprehension(self):184        self.check_roundtrip("{x for x in range(5)}")185    def test_dict_comprehension(self):186        self.check_roundtrip("{x: x*x for x in range(10)}")187    def test_class_decorators(self):188        self.check_roundtrip(class_decorator)189    def test_class_definition(self):190        self.check_roundtrip("class A(metaclass=type, *[], **{}): pass")191    def test_elifs(self):192        self.check_roundtrip(elif1)193        self.check_roundtrip(elif2)194    def test_try_except_finally(self):195        self.check_roundtrip(try_except_finally)196    def test_starred_assignment(self):197        self.check_roundtrip("a, *b, c = seq")198        self.check_roundtrip("a, (*b, c) = seq")199        self.check_roundtrip("a, *b[0], c = seq")200        self.check_roundtrip("a, *(b, c) = seq")201    def test_with_simple(self):202        self.check_roundtrip(with_simple)203    def test_with_as(self):204        self.check_roundtrip(with_as)205    def test_with_two_items(self):206        self.check_roundtrip(with_two_items)207    def test_dict_unpacking_in_dict(self):208        # See issue 26489209        self.check_roundtrip(r"""{**{'y': 2}, 'x': 1}""")210        self.check_roundtrip(r"""{**{'y': 2}, **{'x': 1}}""")211class DirectoryTestCase(ASTTestCase):212    """Test roundtrip behaviour on all files in Lib and Lib/test."""213    NAMES = None214    # test directories, relative to the root of the distribution215    test_directories = 'Lib', os.path.join('Lib', 'test')216    @classmethod217    def get_names(cls):218        if cls.NAMES is not None:219            return cls.NAMES220        names = []221        for d in cls.test_directories:222            test_dir = os.path.join(basepath, d)223            for n in os.listdir(test_dir):224                if n.endswith('.py') and not n.startswith('bad'):225                    names.append(os.path.join(test_dir, n))226        # Test limited subset of files unless the 'cpu' resource is specified.227        if not test.support.is_resource_enabled("cpu"):228            names = random.sample(names, 10)229        # bpo-31174: Store the names sample to always test the same files.230        # It prevents false alarms when hunting reference leaks.231        cls.NAMES = names232        return names233    def test_files(self):234        # get names of files to test235        names = self.get_names()236        for filename in names:237            if test.support.verbose:238                print('Testing %s' % filename)239            # Some f-strings are not correctly round-tripped by240            #  Tools/parser/unparse.py.  See issue 28002 for details.241            #  We need to skip files that contain such f-strings.242            if os.path.basename(filename) in ('test_fstring.py', ):243                if test.support.verbose:244                    print(f'Skipping {filename}: see issue 28002')245                continue246            with self.subTest(filename=filename):247                source = read_pyfile(filename)248                self.check_roundtrip(source)249if __name__ == '__main__':...

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