Method test_side_effect_order

Lib/test/test_fstring.py:863–872

(self)

            exec(r'f"{F():¯\_(ツ)_/¯}"', {'F': CustomFormat})

    def test_side_effect_order(self):
        class X:
            def __init__(self):
                self.i = 0
            def __format__(self, spec):
                self.i += 1
                return str(self.i)

        x = X()
        self.assertEqual(f'{x} {x}', '1 2')

    @unittest.expectedFailure  # TODO: RUSTPYTHON
    def test_missing_expression(self):