#!/usr/bin/env python
# coding: utf-8

# ## 导入依赖

# In[5]:


from unittest.mock import patch

from module import call_func


# ## 错误的用法

# In[6]:


def test_call_func():
    def mocked_funny_func():
        return "not funny at all"

    with patch("dependency.some_funny_func", mocked_funny_func):
        return_value = call_func()

    assert return_value == "not funny at all"
    print("pass")


# In[7]:


test_call_func()


# ## 正确的用法

# In[10]:


def test_call_func():
    def mocked_funny_func():
        return "not funny at all"

    with patch("module.some_funny_func", mocked_funny_func):
        return_value = call_func()

    assert return_value == "not funny at all"
    print("pass")


# In[11]:


test_call_func()


# ## 解析原理

# In[13]:


# 模拟 dependency.some_funny_func
dependency = {}
dependency["some_funny_func"] = "some_value"

# 模拟 module.some_funny_func
module = {}
module["some_funny_func"] = dependency["some_funny_func"]

# 模拟 mock
dependency["some_funny_func"] = "some_other_value"

# 查看结果
print(dependency["some_funny_func"])
print(module["some_funny_func"])