在修补虚拟类时,我观察到不一致的行为:
class A:
def f(self, *args, **kwargs):
pass
如果我手动修补该功能:
call_args_list = []
def mock_fn(*args, **kwargs):
call_args_list.append(mock.call(*args, **kwargs))
with mock.patch.object(A, 'f', mock_fn):
A().f(1, 2)
print(call_args_list) # [call(<__main__.A object at 0x7f0da0c08b50>, 1, 2)]
正如预期的那样mock_fn
被称为self
争论 (mock_fn(self, 1, 2)
).
但是,如果我使用的是mock.Mock
对象,以某种方式self
参数从调用中删除:
mock_obj = mock.Mock()
with mock.patch.object(A, 'f', mock_obj):
A().f(1, 2)
print(mock_obj.call_args_list) # [call(1, 2)]
这种感觉很不协调。mock_obj
被称为mock_obj(self, 1, 2)
, yet mock_obj.call_args == call(1, 2)
。它删除了self
论证来自call_args
。如何访问有界方法实例?