We will now add tests for the models and the views and a few functional tests in the tests.py. Tests ensure that an application works, and that it continues to work after some changes are made in the future.
Testing the Models
We write tests for the model classes and the appmaker. Changing tests.py, we'll write a separate test class for each model class, and we'll write a test class for the appmaker.
To do so, we'll retain the tutorial.tests.ViewTests class provided as a result of the pyramid_zodb project generator. We'll add three test classes: one for the Page model named PageModelTests, one for the Wiki model named WikiModelTests, and one for the appmaker named AppmakerTests.
Testing the Views
We'll modify our tests.py file, adding tests for each view function we added above. As a result, we'll delete the ViewTests test in the file, and add four other test classes: ViewWikiTests, ViewPageTests, AddPageTests, and EditPageTests. These test the view_wiki, view_page, add_page, and edit_page views respectively.
We test the whole application, covering security aspects that are not tested in the unit tests, like logging in, logging out, checking that the viewer user cannot add or edit pages, but the editor user can, and so on.
Viewing the results of all our edits to tests.py
Once we're done with the tests.py module, it will look a lot like the below:
Running the Tests
We can run these tests by using setup.py test in the same way we did in :ref:`running_tests`. However, first we must edit our setup.py to include a dependency on WebTest, which we've used in our tests.py. Change the requires list in setup.py to include WebTest.
After we've added a dependency on WebTest in setup.py, we need to rerun setup.py develop to get WebTest installed into our virtualenv. Assuming our shell's current working directory is the "tutorial" distribution directory:
$ ../bin/python setup.py develop
c:\pyramidtut\tutorial> ..\Scripts\python setup.py develop
Once that command has completed successfully, we can run the tests themselves:
$ ../bin/python setup.py test -q
c:\pyramidtut\tutorial> ..\Scripts\python setup.py test -q
The expected result looks something like:
......... ---------------------------------------------------------------------- Ran 23 tests in 1.653s OK