Class FooStr

Lib/test/test_float.py:226–228

        # Issue 5759: __float__ not called on str subclasses (though it is on
        # unicode subclasses).
        class FooStr(str):
            def __float__(self):
                return float(str(self)) + 1

        self.assertEqual(float(FloatLike(42.)), 42.)
        self.assertEqual(float(Foo2()), 42.)