Python Mockito：我如何模拟 open()

Question

This is the code I want to test这是我要测试的代码

file_handle = open('filename')
content = file_handle.read()

Now, in my test file, I want to mock open()现在，在我的测试文件中，我想模拟open()

I tried using mockito when as below我尝试在以下情况下使用 mockito

when(open(...)).thenReturn(dummy_response)

Answer 1

I found a way, which is not straightforward but works like a charm我找到了一种方法，它并不简单，但效果很好

import builtins

when(builtins).open(...).thenReturn(dummy_response)