Added a default test Client to TestCase, and added some assertions for some common testing patterns.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@5150 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -1,7 +1,9 @@
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import re, doctest, unittest
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import re, doctest, unittest
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from urlparse import urlparse
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from django.db import transaction
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from django.db import transaction
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from django.core import management
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from django.core import management
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from django.db.models import get_apps
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from django.db.models import get_apps
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from django.test.client import Client
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normalize_long_ints = lambda s: re.sub(r'(?<![\w])(\d+)L(?![\w])', '\\1', s)
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normalize_long_ints = lambda s: re.sub(r'(?<![\w])(\d+)L(?![\w])', '\\1', s)
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@ -46,5 +48,33 @@ class TestCase(unittest.TestCase):
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super().
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super().
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"""
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"""
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self.client = Client()
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self.install_fixtures()
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self.install_fixtures()
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super(TestCase, self).run(result)
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super(TestCase, self).run(result)
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def assertRedirects(self, response, expected_path):
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"""Assert that a response redirected to a specific URL, and that the
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redirect URL can be loaded.
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"""
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self.assertEqual(response.status_code, 302,
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"Response didn't redirect: Reponse code was %d" % response.status_code)
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scheme, netloc, path, params, query, fragment = urlparse(response['Location'])
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self.assertEqual(path, expected_path,
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"Response redirected to '%s', expected '%s'" % (path, expected_path))
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redirect_response = self.client.get(path)
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self.assertEqual(redirect_response.status_code, 200,
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"Couldn't retrieve redirection page '%s'" % path)
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def assertContains(self, response, text, count=1):
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"""Assert that a response indicates that a page was retreived successfully,
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(i.e., the HTTP status code was 200), and that ``text`` occurs ``count``
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times in the content of the response.
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"""
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self.assertEqual(response.status_code, 200,
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"Couldn't retrieve page'")
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real_count = response.content.count(text)
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self.assertEqual(real_count, count,
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"Could only find %d of %d instances of '%s' in response" % (real_count, count, text))
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@ -166,7 +166,7 @@ To assist in testing various features of your application, Django provides
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tools that can be used to establish tests and test conditions.
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tools that can be used to establish tests and test conditions.
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* `Test Client`_
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* `Test Client`_
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* Fixtures_
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* `TestCase`_
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Test Client
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Test Client
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-----------
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-----------
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@ -357,9 +357,31 @@ The following is a simple unit test using the Test Client::
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# Check that the rendered context contains 5 customers
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# Check that the rendered context contains 5 customers
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self.failUnlessEqual(len(response.context['customers']), 5)
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self.failUnlessEqual(len(response.context['customers']), 5)
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Fixtures
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TestCase
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--------
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--------
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Normal python unit tests extend a base class of ``unittest.testCase``.
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Django provides an extension of this base class - ``django.test.TestCase``
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- that provides some additional capabilities that can be useful for
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testing web sites.
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Moving from a normal unittest TestCase to a Django TestCase is easy - just
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change the base class of your test from ``unittest.TestCase`` to
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``django.test.TestCase``. All of the standard Python unit test facilities
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will continue to be available, but they will be augmented with some useful
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extra facilities.
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Default Test Client
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~~~~~~~~~~~~~~~~~~~
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** New in Django development version **
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Every test case in a ``django.test.TestCase`` instance has access to an
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instance of a Django `Test Client`_. This Client can be accessed as
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``self.client``. This client is recreated for each test.
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Fixture loading
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~~~~~~~~~~~~~~~
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A test case for a database-backed website isn't much use if there isn't any
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A test case for a database-backed website isn't much use if there isn't any
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data in the database. To make it easy to put test data into the database,
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data in the database. To make it easy to put test data into the database,
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Django provides a fixtures framework.
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Django provides a fixtures framework.
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@ -377,15 +399,13 @@ multiple applications.
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data (such as a default set of categories). Fixtures with other names
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data (such as a default set of categories). Fixtures with other names
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can be installed manually using ``django-admin.py loaddata``.
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can be installed manually using ``django-admin.py loaddata``.
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However, for the purposes of unit testing, each test must be able to
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However, for the purposes of unit testing, each test must be able to
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guarantee the contents of the database at the start of each and every
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guarantee the contents of the database at the start of each and every
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test. To do this, Django provides a TestCase baseclass that can integrate
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test.
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with fixtures.
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Moving from a normal unittest TestCase to a Django TestCase is easy - just
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To define a fixture for a test, all you need to do is add a class
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change the base class of your test, and define a list of fixtures
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attribute to your test describing the fixtures you want the test to use.
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to be used. For example, the test case from `Writing unittests`_ would
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For example, the test case from `Writing unittests`_ would
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look like::
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look like::
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from django.test import TestCase
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from django.test import TestCase
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@ -410,6 +430,24 @@ This flush/load procedure is repeated for each test in the test case, so you
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can be certain that the outcome of a test will not be affected by
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can be certain that the outcome of a test will not be affected by
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another test, or the order of test execution.
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another test, or the order of test execution.
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Assertions
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~~~~~~~~~~
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** New in Django development version **
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Normal Python unit tests have a wide range of assertions, such as
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``assertTrue`` and ``assertEquals`` that can be used to validate behavior.
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``django.TestCase`` adds to these, providing some assertions
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that can be useful in testing the behavior of web sites.
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``assertRedirects(response, expected_path)``
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Assert that the response received redirects the browser to the provided
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path, and that the expected_path can be retrieved.
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``assertContains(response, text, count=1)``
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Assert that a response indicates that a page was retreived successfully,
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(i.e., the HTTP status code was 200), and that ``text`` occurs ``count``
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times in the content of the response.
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Running tests
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Running tests
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=============
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=============
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@ -24,19 +24,14 @@ from django.test import Client, TestCase
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class ClientTest(TestCase):
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class ClientTest(TestCase):
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fixtures = ['testdata.json']
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fixtures = ['testdata.json']
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def setUp(self):
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"Set up test environment"
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self.client = Client()
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def test_get_view(self):
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def test_get_view(self):
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"GET a view"
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"GET a view"
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response = self.client.get('/test_client/get_view/')
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response = self.client.get('/test_client/get_view/')
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# Check some response details
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# Check some response details
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self.assertEqual(response.status_code, 200)
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self.assertContains(response, 'This is a test')
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self.assertEqual(response.context['var'], 42)
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self.assertEqual(response.context['var'], 42)
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self.assertEqual(response.template.name, 'GET Template')
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self.assertEqual(response.template.name, 'GET Template')
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self.failUnless('This is a test.' in response.content)
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def test_get_post_view(self):
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def test_get_post_view(self):
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"GET a view that normally expects POSTs"
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"GET a view that normally expects POSTs"
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@ -80,7 +75,7 @@ class ClientTest(TestCase):
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response = self.client.get('/test_client/redirect_view/')
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response = self.client.get('/test_client/redirect_view/')
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# Check that the response was a 302 (redirect)
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# Check that the response was a 302 (redirect)
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self.assertEqual(response.status_code, 302)
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self.assertRedirects(response, '/test_client/get_view/')
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def test_valid_form(self):
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def test_valid_form(self):
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"POST valid data to a form"
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"POST valid data to a form"
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'value': 37
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'value': 37
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}
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}
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response = self.client.post('/test_client/form_view/', post_data)
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response = self.client.post('/test_client/form_view/', post_data)
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self.assertEqual(response.status_code, 200)
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self.assertContains(response, 'This field is required', 3)
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self.assertEqual(response.template.name, "Invalid POST Template")
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self.assertEqual(response.template.name, "Invalid POST Template")
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def test_form_error(self):
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def test_form_error(self):
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@ -130,7 +125,7 @@ class ClientTest(TestCase):
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# Get the page without logging in. Should result in 302.
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# Get the page without logging in. Should result in 302.
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response = self.client.get('/test_client/login_protected_view/')
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response = self.client.get('/test_client/login_protected_view/')
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self.assertEqual(response.status_code, 302)
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self.assertRedirects(response, '/accounts/login/')
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# Request a page that requires a login
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# Request a page that requires a login
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response = self.client.login('/test_client/login_protected_view/', 'testclient', 'password')
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response = self.client.login('/test_client/login_protected_view/', 'testclient', 'password')
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