def test_Scope_len_register():
scope = Scope()
scope.register(str)
assert len(scope) == 1
assert tuple(scope.keys()) == (str.__name__, )
assert tuple(scope.values()) == (str, )
scope.unregister(str)
assert len(scope) == 0
def test_Scope_len_register_with_name():
scope = Scope()
scope.register(string=str)
assert len(scope) == 1
assert tuple(scope.keys()) == ("string", )
assert tuple(scope.values()) == (str, )
assert scope.supports(str)
scope.unregister(string=str)
assert len(scope) == 0
assert not scope.supports(str)
