Method test_signatures

Lib/test/test_functools.py:3471–3480

(self)

        self.assertIsNone(r())

    def test_signatures(self):
        @functools.singledispatch
        def func(item, arg: int) -> str:
            return str(item)
        @func.register
        def _(item: int, arg: bytes) -> str:
            return str(item)

        self.assertEqual(str(Signature.from_callable(func)),
                         '(item, arg: int) -> str')

    def test_method_signatures(self):
        class A: