Class MinimalCoro

Lib/test/test_collections.py:805–811

                yield

        class MinimalCoro(Coroutine):
            def send(self, value):
                return value
            def throw(self, typ, val=None, tb=None):
                super().throw(typ, val, tb)
            def __await__(self):
                yield

        self.validate_abstract_methods(Awaitable, '__await__')