在django之上为google云端点API编写测试用例

Question

我在我的django应用程序上使用来提供RESTful服务。所有的API服务都运行得很好。现在是写测试用例的时候了。所以我写了这个。

TestPOIList.py

import unittest
from django.test import TestCase
import endpoints
import webtest
from google.appengine.ext import testbed
from .queries import CategoryQuery
from .queries import PointOfInterestQuery
from .models import PointOfInterest
from .api.internal.point_of_interest import PointOfInterests


class Test(TestCase):

    def setUp(self):
        self.testbed = testbed.Testbed()
        self.testbed.setup_env(current_version_id='testbed.version')
        self.testbed.activate()
        self.testbed.init_all_stubs()

        self.category_a = CategoryQuery.create_category_by_name('Museums')
        self.poi = PointOfInterestQuery.create_new_poi(name='bhavan', category=self.category_a,
                                                       place='hdgf', phone='3454545', email='dsg@jhgs.com'
                                                       )

        app = endpoints.api_server([PointOfInterests], restricted=False)
        self.testapp = webtest.TestApp(app)

    def tearDown(self):
        self.testbed.deactivate()

    # Test the handler.
    def test_should_return_list_of_pois(self):
        msg = {}
        resp = self.testapp.post_json('/_ah/spi/PointOfInterests.get_list', msg, status='*')
        self.assertEqual(resp.status_code, 200)
        self.assertEqual(resp.json['pois']['name'], 'Saravan bhavan')

我试着用python manage.py test，python manage.py test appname运行上面的代码。但这行不通。

我还试过django-nose。它甚至连一个测试用例都无法测试。运行python manage.py test后显示的输出是，

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK
Destroying test database for alias 'default'...

所以它没能运行我的第一个测试案例。请给我一些建议。

编辑：

将文件名更改为testpoilist可以找到测试用例，但它无法导入与应用程序引擎相关的模块。并导致了许多import错误。所以我试着运行nosetests，但是它显示，

$ nosetests -q -w src/ --with-gae
Traceback (most recent call last):
  File "/home/gemini/.virtualenvs/sample/bin/nosetests", line 11, in <module>
    sys.exit(run_exit())
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/core.py", line 121, in __init__
    **extra_args)
  File "/usr/lib/python2.7/unittest/main.py", line 94, in __init__
    self.parseArgs(argv)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/core.py", line 145, in parseArgs
    self.config.configure(argv, doc=self.usage())
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/config.py", line 346, in configure
    self.plugins.configure(options, self)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/plugins/manager.py", line 284, in configure
    cfg(options, config)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/plugins/manager.py", line 99, in __call__
    return self.call(*arg, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/plugins/manager.py", line 167, in simple
    result = meth(*arg, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nosegae.py", line 85, in configure
    import appengine_config
  File "/home/gemini/projects/sample-backend/src/appengine_config.py", line 22, in <module>
    vendor.add('lib')
  File "/home/gemini/softwares/google_appengine/google/appengine/ext/vendor/__init__.py", line 44, in add
    'No such virtualenv or site directory' % path)
ValueError: virtualenv: cannot access lib: No such virtualenv or site directory

编辑2:在将vendor.add('lib')更改为下面的答案中指定的内容后，我得到了这个错误。

$ nosetests -q -w src/ --with-gae
Traceback (most recent call last):
  File "/home/gemini/.virtualenvs/sample/bin/nosetests", line 11, in <module>
    sys.exit(run_exit())
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/core.py", line 121, in __init__
    **extra_args)
  File "/usr/lib/python2.7/unittest/main.py", line 95, in __init__
    self.runTests()
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/core.py", line 207, in runTests
    result = self.testRunner.run(self.test)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/core.py", line 62, in run
    test(result)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 177, in __call__
    return self.run(*arg, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 224, in run
    test(orig)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 177, in __call__
    return self.run(*arg, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 224, in run
    test(orig)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 177, in __call__
    return self.run(*arg, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 217, in run
    for test in self._tests:
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 372, in _get_wrapped_tests
    for test in self._get_tests():
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 99, in _get_tests
    for test in self.test_generator:
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 191, in loadTestsFromDir
    entry_path, discovered=True)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 433, in loadTestsFromName
    discovered=discovered)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 354, in loadTestsFromModule
    tests.extend(self.loadTestsFromDir(module_path))
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 191, in loadTestsFromDir
    entry_path, discovered=True)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 433, in loadTestsFromName
    discovered=discovered)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 354, in loadTestsFromModule
    tests.extend(self.loadTestsFromDir(module_path))
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 183, in loadTestsFromDir
    entry_path, discovered=True)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/loader.py", line 427, in loadTestsFromName
    address=addr.totuple())])
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 427, in __call__
    return self.makeSuite(tests, context, **kw)
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 482, in makeSuite
    for ancestor in self.ancestry(context):
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/suite.py", line 453, in ancestry
    yield resolve_name('.'.join(ancestors))
  File "/home/gemini/.virtualenvs/sample/local/lib/python2.7/site-packages/nose/util.py", line 322, in resolve_name
    obj = getattr(obj, part)
AttributeError: 'module' object has no attribute 'failure'

编辑3:

我还尝试使用python manage.py test运行django测试。但这表明，

ERROR: src.tests.api.internal.test_poi_list (unittest.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: src.tests.api.internal.test_poi_list
Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/loader.py", line 254, in _find_tests
    module = self._get_module_from_name(name)
  File "/usr/lib/python2.7/unittest/loader.py", line 232, in _get_module_from_name
    __import__(name)
  File "/home/gemini/projects/backend/src/tests/api/internal/test_poi_list.py", line 9, in <module>
    from guide.api.internal.point_of_interest import PointOfInterests
  File "/home/gemini/projects/backend/src/cityguide/api/internal/point_of_interest.py", line 12, in <module>
    from guide.api.common import GuideInternalAPI
  File "/home/gemini/projects/backend/src/guide/api/common.py", line 9, in <module>
    GuideInternalAPI = endpoints.api(name='GuideInternalAPI',
AttributeError: 'module' object has no attribute 'api'


----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)

看来我就快接近了。PYTHONPATH变量显示google_appengine sdk路径。

Answer 1

通过将项目的lib文件夹附加到系统路径变量中，我设法解决了这个问题。

所以manage.py文件的一部分应该是，

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
    sys.path.append(sys.path[0] + os.path.sep + 'lib')

然后通过django运行测试。不要做nosetest。

python manage.py test

注意，您的测试文件应该有一个以test开头的名称，这样django就会把它当作一个测试文件。我的一个测试文件看起来像，

import unittest
from django.test import TestCase
import endpoints
import webtest
from google.appengine.ext import testbed
from project.queries import CategoryQuery
from project.api.internal.categories import Categories


class Test(TestCase):

    def setUp(self):
        self.testbed = testbed.Testbed()
        self.testbed.setup_env(current_version_id='testbed.version')
        self.testbed.activate()
        self.testbed.init_all_stubs()

        self.category_a = CategoryQuery.create_category_by_name('Museums')

        app = endpoints.api_server([Categories], restricted=False)
        self.testapp = webtest.TestApp(app)

    def tearDown(self):
        self.testbed.deactivate()

    # Test the handler.
    def test_should_return_list_of_pois(self):
        msg = {}
        resp = self.testapp.post_json('/_ah/spi/Categories.get_list', msg, status='*')
        self.assertEqual(resp.status_code, 200)
        self.assertEqual(resp.json['categories'][0]['name'], 'Museums')

Answer 2

在appengine_config.py中，将vendor.add('lib')更改为vendor.add(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'lib'))。您的测试正在执行的路径不是相对于lib的，因此您将看到该错误。不要忘记导入os。