爲什麼app engine project不能調用unittest.TestCase.tearDown（）？

我正在嘗試安裝App Engine python教程的測試。看來unittest.tearDown（）沒有被調用，因爲我放入tearDown方法中的print語句沒有顯示。爲什麼app engine project不能調用unittest.TestCase.tearDown（）？

unittest.TestCase.setUp（）被調用，那麼爲什麼tearDown（）不被調用？

import sys, os, subprocess, time, unittest, shlex  
sys.path.append("/usr/local/google_appengine") 
sys.path.append('/usr/local/google_appengine/lib/')  
sys.path.append("/usr/local/google_appengine/lib/yaml/lib")  
sys.path.append("/usr/local/google_appengine/lib/webapp2-2.5.2")  
sys.path.append("/usr/local/google_appengine/lib/django-1.5")  
sys.path.append("/usr/local/google_appengine/lib/cherrypy")  
sys.path.append("/usr/local/google_appengine/lib/concurrent")  
sys.path.append("/usr/local/google_appengine/lib/docker")  
sys.path.append("/usr/local/google_appengine/lib/requests")  
sys.path.append("/usr/local/google_appengine/lib/websocket")  
sys.path.append("/usr/local/google_appengine/lib/fancy_urllib")  
sys.path.append("/usr/local/google_appengine/lib/antlr3")  

from selenium import webdriver  
from selenium.webdriver.common.keys import Keys 

from google.appengine.api import memcache, apiproxy_stub, apiproxy_stub_map  
from google.appengine.ext import testbed  
from google.appengine.datastore import datastore_stub_util  
from google.appengine.tools.devappserver2 import devappserver2  
from guestbook import Author, Greeting  
from google.appengine.api import users 
from google.appengine.ext import ndb 


class NewVisitorTest(unittest.TestCase):  
    # enable the datastore stub 
    nosegae_datastore_v3 = True 
    nosegae_datastore_v3_kwargs = { 
     'datastore_file': '/tmp/nosegae.sqlite3', 
     'use_sqlite': True 
    } 

    def setUp(self):  
     self.testbed = testbed.Testbed() 
     self.testbed.setup_env(app_id='guestbook')  
     self.testbed.activate()   
     self.datastore_stub = apiproxy_stub_map.apiproxy.GetStub('datastore_v3')  
     ndb.get_context().clear_cache()  
     APP_CONFIGS = ['app.yaml']  

    def tearDown(self): 
     print("#####################functional_tests.teardown called") 
     self.testbed.deactivate() 
     # I put a print statement into testbed.deactivate and it's not showing up.  
     ndb.get_context().clear_cache()  

    def loginUser(self, email="[email protected]", id='888', is_admin=False): 
     self.testbed.setup_env( 
      user_email=email, 
      user_id=id, 
      user_is_admin='1' if is_admin else '0', 
      overwrite=True 
     ) 
     self.testbed.init_user_stub() 

    def test_guest_can_submit_new_greeting_and_author(self): 

     #self.browser.get('http://localhost:8080') 
     self.loginUser() 
     greetings = Greeting.query(Greeting.author.email=='[email protected]').get() 
     pprint.pprint(greetings) 
     assert(Greeting.query(Greeting.author.email=='[email protected]').get() 
self.assertEqual(1, len(Greeting.query().fetch(10))) 

    def test_entity_saves(self): 
     self.loginUser()    
     entity_key = Greeting(content="Test Value", 
          author = Author( 
            identity=users.get_current_user().user_id(), 
            email=users.get_current_user().email()) 
          ).put() 
     print(entity_key) 
     self.assertIsNotNone(entity_key.id())  
     #self.assertNotNone(entity.key.id())

下面是從測試的輸出：

nosetests -v --with-GAE

test_entity_saves (functional_tests.NewVisitorTest) ... ok 
test_guest_can_submit_new_greeting_and_author (functional_tests.NewVisitorTest) ... FAIL 

====================================================================== 
FAIL: test_guest_can_submit_new_greeting_and_author (functional_tests.NewVisitorTest) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/Users/Bryan/work/GoogleAppEngine/guestbook/functional_tests.py", line 124, in test_guest_can_submit_new_greeting_and_author 
    self.assertEqual(1, len(Greeting.query().fetch(10))) 
AssertionError: 1 != 10 
-------------------- >> begin captured stdout << --------------------- 
#*#**#*#*#*#*#*#*#*#*nosegae.py startTest 
Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460)) 

--------------------- >> end captured stdout << ---------------------- 
-------------------- >> begin captured logging << -------------------- 
root: DEBUG: all_pending: add <Future 106a2e690 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); pending> 
root: DEBUG: Clearing stale EventLoop instance... 
root: DEBUG: current = deque([(<bound method AutoBatcher._finished_callback of AutoBatcher(_memcache_del_tasklet)>, (<Future 1069e9650 created by run_queue(context.py:185) for tasklet _memcache_del_tasklet(context.py:1131); result None>, [(<Future 1069e9590 created by add(context.py:211) for AutoBatcher(_memcache_del_tasklet).add(NDB9:ag1kZXZ-Z3Vlc3Rib29rcg8LEghHcmVldGluZxjhXQw, (0, '', None)); result 1>, 'NDB9:ag1kZXZ-Z3Vlc3Rib29rcg8LEghHcmVldGluZxjhXQw')]), {})]) 
root: DEBUG: Cleared 
root: DEBUG: nowevent: _help_tasklet_along 
root: DEBUG: Sending None to initial generator _get_async(query.py:1247) 
root: DEBUG: all_pending: add <Future 106a2e850 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: initial generator _get_async(query.py:1247) yielded <Future 106a2e850 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: <Future 106a2e690 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247) suspended generator _get_async(query.py:1250); pending> is now blocked waiting for <Future 106a2e850 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: nowevent: _help_tasklet_along 
root: DEBUG: Sending None to initial generator _run_to_list(query.py:971) 
root: DEBUG: initial generator _run_to_list(query.py:971) yielded <google.appengine.api.apiproxy_stub_map.UserRPC object at 0x106a2ed50> 
root: DEBUG: rpc: datastore_v3.RunQuery 
root: DEBUG: Sending <google.appengine.datastore.datastore_query.Batch object at 0x106a2ec50> to suspended generator _run_to_list(query.py:979) 
root: DEBUG: suspended generator _run_to_list(query.py:979) returned [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))] 
root: DEBUG: all_pending: success: remove <Future 106a2e850 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); result [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))]> 
root: DEBUG: nowevent: _on_future_completion 
root: DEBUG: <Future 106a2e690 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); pending> is no longer blocked waiting for <Future 106a2e850 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); result [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))]> 
root: DEBUG: Sending [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))] to suspended generator _get_async(query.py:1250) 
root: DEBUG: suspended generator _get_async(query.py:1250) returned Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460)) 
root: DEBUG: all_pending: success: remove <Future 106a2e690 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); result Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))> 
root: DEBUG: all_pending: add <Future 1069e9ad0 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); pending> 
root: DEBUG: nowevent: _help_tasklet_along 
root: DEBUG: Sending None to initial generator _get_async(query.py:1247) 
root: DEBUG: all_pending: add <Future 106a2e650 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: initial generator _get_async(query.py:1247) yielded <Future 106a2e650 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: <Future 1069e9ad0 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247) suspended generator _get_async(query.py:1250); pending> is now blocked waiting for <Future 106a2e650 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: nowevent: _help_tasklet_along 
root: DEBUG: Sending None to initial generator _run_to_list(query.py:971) 
root: DEBUG: initial generator _run_to_list(query.py:971) yielded <google.appengine.api.apiproxy_stub_map.UserRPC object at 0x106a2ee50> 
root: DEBUG: rpc: datastore_v3.RunQuery 
root: DEBUG: Sending <google.appengine.datastore.datastore_query.Batch object at 0x106a2ee10> to suspended generator _run_to_list(query.py:979) 
root: DEBUG: suspended generator _run_to_list(query.py:979) returned [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))] 
root: DEBUG: all_pending: success: remove <Future 106a2e650 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); result [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))]> 
root: DEBUG: nowevent: _on_future_completion 
root: DEBUG: <Future 1069e9ad0 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); pending> is no longer blocked waiting for <Future 106a2e650 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); result [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))]> 
root: DEBUG: Sending [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))] to suspended generator _get_async(query.py:1250) 
root: DEBUG: suspended generator _get_async(query.py:1250) returned Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460)) 
root: DEBUG: all_pending: success: remove <Future 1069e9ad0 created by get_async(query.py:1245) for tasklet _get_async(query.py:1247); result Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460))> 
root: DEBUG: all_pending: add <Future 1069cf8d0 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); pending> 
root: DEBUG: nowevent: _help_tasklet_along 
root: DEBUG: Sending None to initial generator _run_to_list(query.py:971) 
root: DEBUG: initial generator _run_to_list(query.py:971) yielded <google.appengine.api.apiproxy_stub_map.UserRPC object at 0x106a2edd0> 
root: DEBUG: rpc: datastore_v3.RunQuery 
root: DEBUG: Sending <google.appengine.datastore.datastore_query.Batch object at 0x106a2ef10> to suspended generator _run_to_list(query.py:979) 
root: DEBUG: suspended generator _run_to_list(query.py:979) returned [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460)), Greeting(key=Key('Greeting', 1001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 43, 164283)), Greeting(key=Key('Greeting', 2001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 44, 59, 425351)), Greeting(key=Key('Greeting', 3001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 45, 39, 127541)), Greeting(key=Key('Greeting', 4001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 46, 40, 884853)), Greeting(key=Key('Greeting', 5001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 21, 10, 45, 14308)), Greeting(key=Key('Greeting', 6001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 21, 56, 12, 419565)), Greeting(key=Key('Greeting', 7001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 22, 0, 14, 800335)), Greeting(key=Key('Greeting', 8001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 22, 1, 7, 931768)), Greeting(key=Key('Greeting', 9001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 21, 13, 34, 43, 876008))] 
root: DEBUG: all_pending: success: remove <Future 1069cf8d0 created by fetch_async(query.py:1223) for tasklet _run_to_list(query.py:971); result [Greeting(key=Key('Greeting', 1), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 37, 659460)), Greeting(key=Key('Greeting', 1001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 39, 43, 164283)), Greeting(key=Key('Greeting', 2001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 44, 59, 425351)), Greeting(key=Key('Greeting', 3001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 45, 39, 127541)), Greeting(key=Key('Greeting', 4001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 20, 46, 40, 884853)), Greeting(key=Key('Greeting', 5001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 21, 10, 45, 14308)), Greeting(key=Key('Greeting', 6001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 21, 56, 12, 419565)), Greeting(key=Key('Greeting', 7001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 22, 0, 14, 800335)), Greeting(key=Key('Greeting', 8001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 18, 22, 1, 7, 931768)), Greeting(key=Key('Greeting', 9001), author=Author(email=u'[email protected]', identity=u'888'), content=u'Test Value', date=datetime.datetime(2016, 3, 21, 13, 34, 43, 876008))]> 
--------------------- >> end captured logging << --------------------- 

---------------------------------------------------------------------- 
Ran 2 tests in 0.835s 

FAILED (failures=1)

＃

EDIT朝向分辨率：
的拆解（）已被調用，印刷品的輸出正被鼻子吞食。
--nocapture標誌停止此行爲。

失敗測試中數據存儲實體的持久性源自testbed.deactivate（）似乎只刷新內存數據存儲而不刷新存儲在硬盤驅動器文件中的數據。
我已經定義的「datastore_file」與路徑到sqlite3的數據庫這似乎儘管testbed.deactivate維護狀態（）

來源

2016-03-21 BryanWheelock

在安裝程序中是否有任何異常？只有在設置成功後纔會調用 –

我已經查找了異常。如果他們正在發生，他們沒有被記錄，因爲我包括了上面的所有輸出。我也嘗試在設置中放置打印語句並將它們記錄下來，所以我認爲設置運行沒有問題。我怎麼能得到更細粒度？ – BryanWheelock

您的測試在'test_guest_can_submit_new_greeting_and_author'上失敗了嗎？我有一段時間沒有進行過Python測試，但是如果在退出課程之前測試失敗，將會調用「tearDown」作爲類級方法？ – PieOhPah

拆機方法被調用，但nosetests被吞嚥的輸出。

這是一個最小的例子。

import unittest 


class MyTestCase(unittest.TestCase): 

    def setUp(self): 
     pass 

    def tearDown(self): 
     print 'Calling tearDown' 

    def test_1(self): 
     self.assertTrue(True) 

    def test_2(self): 
     self.assertTrue(False)

與單元測試的測試運行標準庫調用，示出了對於每個測試從打印語句輸出：

$ python -m unittest tests 
Calling tearDown 
.FCalling tearDown 

====================================================================== 
FAIL: test_2 (tests.MyTestCase) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "tests.py", line 16, in test_2 
    self.assertTrue(False) 
AssertionError: False is not true 

---------------------------------------------------------------------- 
Ran 2 tests in 0.000s 

FAILED (failures=1)

與nosetests調用，未示出的輸出：

$ nosetests -v --with-gae --gae-lib-root=$APPENGINE 
test_1 (tests.MyTestCase) ... ok 
test_2 (tests.MyTestCase) ... FAIL 

====================================================================== 
FAIL: test_2 (tests.MyTestCase) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/home/kev/python_projects/usr/local/bin/python2.7/tests.py", line 16, in test_2 
    self.assertTrue(False) 
AssertionError: False is not true 

---------------------------------------------------------------------- 
Ran 2 tests in 0.268s 

FAILED (failures=1)

如果我們通過--nocapture標誌進行鼻子測試，將顯示打印聲明的輸出：

$ nosetests -v --nocapture --with-gae --gae-lib-root=$APPENGINE 
test_1 (tests.MyTestCase) ... Calling tearDown 
ok 
test_2 (tests.MyTestCase) ... FAIL 
Calling tearDown 

====================================================================== 
FAIL: test_2 (tests.MyTestCase) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/home/kev/python_projects/usr/local/bin/python2.7/tests.py", line 16, in test_2 
    self.assertTrue(False) 
AssertionError: False is not true 

---------------------------------------------------------------------- 
Ran 2 tests in 0.265s 

FAILED (failures=1)

的--nocapture選項在http://nose.readthedocs.org/en/latest/plugins/capture.html

來源

2016-03-28 11:17:23 snakecharmerb

--no-capture確實揭示了先前隱藏的打印語句。看起來像teardown（）被調用，但無論出於什麼原因都不會刷新數據庫。 – BryanWheelock

@BryanWheelock我不能肯定地說，但它看起來像你的代碼是GAE文檔中描述的'單元測試'方法和Nosegae文檔中的描述的混合體，沒有調用setUp/tearDown 。如果你想堅持使用nosegae，我建議你看看http://pythonhosted.org/NoseGAE/#configuring-the-testbed，並且更加貼近他們的示例代碼。 – snakecharmerb

感謝您的鏈接。我很難在文檔https://cloud.google.com/appengine/docs – BryanWheelock

代碼本描述不與輸出匹配。據輸出，測試失敗是test_guest_can_submit_new_greeting_and_author和故障以下幾點：

Traceback (most recent call last): 
     File "/Users/Bryan/work/GoogleAppEngine/guestbook/functional_tests.py", line 124, in test_guest_can_submit_new_greeting_and_author 
     self.assertEqual(1, len(Greeting.query().fetch(10))) 
    AssertionError: 1 != 10

但test_guest_can_submit_new_greeting_and_author不包含顯示斷言：

def test_guest_can_submit_new_greeting_and_author(self): 

    #self.browser.get('http://localhost:8080') 
    self.loginUser() 
    greetings = Greeting.query(Greeting.author.email=='[email protected]').get() 
    pprint.pprint(greetings) 
    assert(Greeting.query(Greeting.author.email=='[email protected]').get())

看起來像你的測試運行不同版本的文件。

來源

2016-03-28 11:29:07

以外找到任何示例代碼。 self.assertEqual（1，len（Greeting.query（）。fetch（10）））我有一堆關於我刪除的代碼的意見， – BryanWheelock

爲什麼app engine project不能調用unittest.TestCase.tearDown（）？

回答

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