Python 2.7 UnitTest在運行單個腳本文件時運行良好，但在Pycharm運行/調試配置中運行該文件夾時運行失敗

Question

Python 2.7 unittest在運行單個腳本文件時運行良好，但在Pycharm Run中運行文件夾時失敗/調試配置。

的單元測試情況：

import unittest 
import sys 
import os 
import time 

from tests import test_config 
from test_config import LOGGING_FILE_PATH, LOGGING_FILE_NAME 


class LogTestCase(unittest.TestCase): 
    @classmethod 
    def setUpClass(cls): 
     sys.modules["config"] = test_config 
     from lib import log 
     cls.log = log 

def check_log(self, msg): 
    try: 
     fp = open(os.path.join(LOGGING_FILE_PATH, LOGGING_FILE_NAME)) 
    except IOError as e: 
     raise e 
    else: 
     with fp: 
      self.assertIn(msg, fp.read()) 

def tearDown(self): 
    try: 
     fp = open(os.path.join(LOGGING_FILE_PATH, LOGGING_FILE_NAME), 'w') 
    except IOError as e: 
     raise e 
    else: 
     with fp: 
      fp.truncate() 

def setUp(self): 
    time.sleep(0) 

@classmethod 
def tearDownClass(cls): 
    if os.path.isfile(os.path.join(LOGGING_FILE_PATH, LOGGING_FILE_NAME)): 
     os.remove(os.path.join(LOGGING_FILE_PATH, LOGGING_FILE_NAME)) 

def test_log_debug(self): 
    msg = 'test log debug' 
    self.log.debug(msg) 
    self.check_log(msg) 

def test_log_info(self): 
    msg = 'test log info' 
    self.log.info(msg) 
    self.check_log(msg) 

def test_log_warning(self): 
    msg = 'test log warning' 
    self.log.warning(msg) 
    self.check_log(msg) 

def test_log_error(self): 
    msg = 'test log error' 
    self.log.error(msg, exc_info=False) 
    self.check_log(msg) 

def test_log_critical(self): 
    msg = 'test log critical' 
    self.log.critical(msg) 
    self.check_log(msg) 


if __name__ == '__main__': 
    unittest.main() 

這種運作良好，當我設置的Python測試腳本 'Jetbrains的Pycharm運行/調試配置'。所有5個測試通過了。

但是，當我設置Python測試文件夾，其中包含'運行/調試配置'中的'LogTestCase'腳本。 5次測試失敗（有10次測試，另5次測試在另一個文件中）。

結果：

2016-02-20 23:08:59,901 - test_log.py:65:test_log_critical - CRITICAL - test log critical 

2016-02-20 23:08:59,902 - log.py:136:error - ERROR - test log error 

2016-02-20 23:08:59,903 - test_log.py:50:test_log_info - INFO - test log info 

Error 
Traceback (most recent call last): 
    File "project_path/tests/test_log.py", line 66, in test_log_critical 
    self.check_log(msg) 
    File "project_path/tests/test_log.py", line 21, in check_log 
    raise e 
IOError: [Errno 2] No such file or directory: 'project_path/tests/test_log' 


Failure 
Expected :'test log debug' 
Actual :'' 
<Click to see difference> 

Traceback (most recent call last): 
    File "project_path/tests/test_log.py", line 46, in test_log_debug 
    self.check_log(msg) 
    File "project_path/tests/test_log.py", line 24, in check_log 
    self.assertIn(msg, fp.read()) 
AssertionError: 'test log debug' not found in '' 


Failure 
Expected :'test log error' 
Actual :'' 
<Click to see difference> 

Traceback (most recent call last): 
    File "project_path/tests/test_log.py", line 61, in test_log_error 
    self.check_log(msg) 
    File "project_path/tests/test_log.py", line 24, in check_log 
    self.assertIn(msg, fp.read()) 
AssertionError: 'test log error' not found in '' 


Failure 
Expected :'test log info' 
Actual :'' 
<Click to see difference> 

Traceback (most recent call last): 
    File "project_path/tests/test_log.py", line 51, in test_log_info 
    self.check_log(msg) 
    File "project_path/tests/test_log.py", line 24, in check_log 
    self.assertIn(msg, fp.read()) 
AssertionError: 'test log info' not found in '' 


Failure 
Expected :'test log warning' 
Actual :'' 
<Click to see difference> 

Traceback (most recent call last): 
    File "project_path/tests/test_log.py", line 56, in test_log_warning 
    self.check_log(msg) 
    File "project_path/tests/test_log.py", line 24, in check_log 
    self.assertIn(msg, fp.read()) 
AssertionError: 'test log warning' not found in '' 

2016-02-20 23:08:59,903 - test_log.py:55:test_log_warning - WARNING - test log warning 

Process finished with exit code 0 

上述所有，謝謝。

Answer 1

我可以猜測的是，在其他測試你再有這樣的事情

@classmethod 
def setUpClass(cls): 
    sys.modules["config"] = test_config 
    from lib import log 
    cls.log = log 

當你單獨運行的測試，你有沒有問題。但是當你在像pycharm這樣的測試套件中運行它們時，第二個from lib import log不起作用（模塊已經加載）：log模塊，我猜可以通過config得到它的配置模塊仍然使用先前配置的模塊測試。

我的建議是看看到mock框架（可通過PIP在Python 2.7）及其patch方法：通過這種方式，您可以有上下文的完全控制，你將適用於您的黑客變化。

您還可以通過使用reload嘗試解決這一點，但我極力勸阻你它很難維持檢測分離，如果你開始使用這些類型的招數，你會遇到一些種類的非常賠率行爲。深入學習patch：你會愛上它的。

[編輯]

沒有看到如何使用logconfig我真的不能由真正的解決問題的答案。我可以猜測，更好的補丁地點是log模塊，但如何做到這一點是不可能的。

• config模塊使用什麼日誌？
• 它是如何導入的？

這裏真正需要的是一種以某種方式配置記錄器並設置路徑和文件名的方法。我想你可以通過在log模塊或者補丁中引入一個新功能來實現，但是細節確實是扭曲的。log模塊代碼如何。