Method test_compare_literals

Lib/test/test_ast/test_ast.py:706–748

(self)

        self.assertTrue(ast.compare(b, a, compare_attributes=True))

    def test_compare_literals(self):
        constants = (
            -20,
            20,
            20.0,
            1,
            1.0,
            True,
            0,
            False,
            frozenset(),
            tuple(),
            "ABCD",
            "abcd",
            "中文字",
            1e1000,
            -1e1000,
        )
        for next_index, constant in enumerate(constants[:-1], 1):
            next_constant = constants[next_index]
            with self.subTest(literal=constant, next_literal=next_constant):
                self.assertTrue(
                    ast.compare(ast.Constant(constant), ast.Constant(constant))
                )
                self.assertFalse(
                    ast.compare(
                        ast.Constant(constant), ast.Constant(next_constant)
                    )
                )

        same_looking_literal_cases = [
            {1, 1.0, True, 1 + 0j},
            {0, 0.0, False, 0 + 0j},
        ]
        for same_looking_literals in same_looking_literal_cases:
            for literal in same_looking_literals:
                for same_looking_literal in same_looking_literals - {literal}:
                    self.assertFalse(
                        ast.compare(
                            ast.Constant(literal),
                            ast.Constant(same_looking_literal),
                        )
                    )

    def test_compare_fieldless(self):
        self.assertTrue(ast.compare(ast.Add(), ast.Add()))