125             code2 = ast.unparse(ast1)
126             ast2 = ast.parse(code2, **kwargs)
133     def get_source(self, code1, code2=None):  argument
134         code2 = code2 or code1
136         return code1, code2
138     def check_src_roundtrip(self, code1, code2=None):  argument
139         code1, code2 = self.get_source(code1, code2)
140         with self.subTest(code1=code1, code2=code2):
141             self.assertEqual(code2, code1)
143     def check_src_dont_roundtrip(self, code1, code2=None):  argument
144         code1, code2 = self.get_source(code1, code2)
145         with self.subTest(code1=code1, code2=code2):
146             self.assertNotEqual(code2, code1)