Method check_invalid

Lib/test/test_unparse.py:141–143

(self, node, raises=ValueError)

            self.assertASTEqual(ast1, ast2)

    def check_invalid(self, node, raises=ValueError):
        with self.subTest(node=node):
            self.assertRaises(raises, ast.unparse, node)

    def get_source(self, code1, code2=None, **kwargs):
        code2 = code2 or code1