Question

我想使用[pytest monkeypatch] [1]模拟导入的类进入一个单独的模块。这实际上可行吗？如果可以，怎么办？似乎我没有看到这种确切情况的例子。假设您的应用已在something.py

中导入了类A。

from something import A #Class is imported

class B :
  def __init__(self) :
   self.instance = A() #class instance is created

  def f(self, value) :
    return self.instance.g(value)

在我的test.py内部，我想在B内部模拟A

from something import B

#this is where I would mock A such that
def mock_A :
  def g(self, value) :
    return 2*value

#Then I would call B
c = B()
print(c.g(2)) #would be 4

I see how monkeypatch can be used to patch instances of classes, but how is it done for classes that have not yet been instantiated?  Is it possible?  Thanks!

  [1]: https://docs.pytest.org/en/latest/monkeypatch.html

Answer 1

测试了这个，对我有用：

shlex

如何使用pytest monkeypatch修补类

1 个答案: