Question

我正在尝试为App Engine python教程设置测试。似乎没有调用unittest.tearDown（），因为我没有显示我在tearDown方法中输入的print语句。

正在调用unittest.TestCase.setUp（），为什么没有调用tearDown（）？

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="elonMusk@example.com", 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=='elonMusk@example.com').get()  
         pprint.pprint(greetings)  
         assert(Greeting.query(Greeting.author.email=='elonMusk@example.com').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())

以下是测试的输出：

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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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'elonMusk@example.com', 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)

＃

编辑决议：
正在调用拆解（），印刷品的输出被鼻子测试吞噬 --nocapture标志会阻止此行为。

失败测试中数据存储区实体的持久性源于testbed.deactivate（）似乎只刷新内存数据存储区而不是存储在硬盘驱动器上的文件中的数据。我已经定义了＆＃39; datastore_file＆＃39;使用sqlite3数据库的路径，尽管testbed.deactivate（）

，它仍然保持状态

Answer 1

正在调用tearDown方法，但是nosetests正在吞咽输出。

这是一个最小的例子。

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)

使用标准库unittest测试运行器调用，每个测试显示print语句的输出：

$ 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)

使用nosetests调用，输出不显示：

$ 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)

如果我们将--nocapture标志传递给nosetests，则会显示print语句的输出：

$ 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)

在http://nose.readthedocs.org/en/latest/plugins/capture.html

中描述了--nocapture选项

Answer 2

存在的代码与输出不匹配。根据输出，失败的测试是test_guest_can_submit_new_greeting_and_author，失败的是：

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

但是test_guest_can_submit_new_greeting_and_author并不包含显示的断言：

def test_guest_can_submit_new_greeting_and_author(self):  

     #self.browser.get('http://localhost:8080')  
     self.loginUser()  
     greetings = Greeting.query(Greeting.author.email=='elonMusk@example.com').get()  
     pprint.pprint(greetings)  
     assert(Greeting.query(Greeting.author.email=='elonMusk@example.com').get())

看起来你用测试执行不同版本的文件。

为什么app引擎项目没有调用unittest.TestCase.tearDown（）？

2 个答案: