Adding Tests

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.

Functional tests

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:

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
import unittest

from pyramid import testing

class PageModelTests(unittest.TestCase):

    def _getTargetClass(self):
        from tutorial.models import Page
        return Page

    def _makeOne(self, data=u'some data'):
        return self._getTargetClass()(data=data)

    def test_constructor(self):
        instance = self._makeOne()
        self.assertEqual(instance.data, u'some data')

class WikiModelTests(unittest.TestCase):

    def _getTargetClass(self):
        from tutorial.models import Wiki
        return Wiki

    def _makeOne(self):
        return self._getTargetClass()()

    def test_it(self):
        wiki = self._makeOne()
        self.assertEqual(wiki.__parent__, None)
        self.assertEqual(wiki.__name__, None)

class AppmakerTests(unittest.TestCase):
    def _callFUT(self, zodb_root):
        from tutorial.models import appmaker
        return appmaker(zodb_root)

    def test_it(self):
        root = {}
        self._callFUT(root)
        self.assertEqual(root['app_root']['FrontPage'].data,
                         'This is the front page')

class ViewWikiTests(unittest.TestCase):
    def test_it(self):
        from tutorial.views import view_wiki
        context = testing.DummyResource()
        request = testing.DummyRequest()
        response = view_wiki(context, request)
        self.assertEqual(response.location, 'http://example.com/FrontPage')

class ViewPageTests(unittest.TestCase):
    def _callFUT(self, context, request):
        from tutorial.views import view_page
        return view_page(context, request)

    def test_it(self):
        wiki = testing.DummyResource()
        wiki['IDoExist'] = testing.DummyResource()
        context = testing.DummyResource(data='Hello CruelWorld IDoExist')
        context.__parent__ = wiki
        context.__name__ = 'thepage'
        request = testing.DummyRequest()
        info = self._callFUT(context, request)
        self.assertEqual(info['page'], context)
        self.assertEqual(
            info['content'],
            '<div class="document">\n'
            '<p>Hello <a href="http://example.com/add_page/CruelWorld">'
            'CruelWorld</a> '
            '<a href="http://example.com/IDoExist/">'
            'IDoExist</a>'
            '</p>\n</div>\n')
        self.assertEqual(info['edit_url'],
                         'http://example.com/thepage/edit_page')


class AddPageTests(unittest.TestCase):
    def _callFUT(self, context, request):
        from tutorial.views import add_page
        return add_page(context, request)

    def test_it_notsubmitted(self):
        context = testing.DummyResource()
        request = testing.DummyRequest()
        request.subpath = ['AnotherPage']
        info = self._callFUT(context, request)
        self.assertEqual(info['page'].data,'')
        self.assertEqual(
            info['save_url'],
            request.resource_url(context, 'add_page', 'AnotherPage'))

    def test_it_submitted(self):
        context = testing.DummyResource()
        request = testing.DummyRequest({'form.submitted':True,
                                        'body':'Hello yo!'})
        request.subpath = ['AnotherPage']
        self._callFUT(context, request)
        page = context['AnotherPage']
        self.assertEqual(page.data, 'Hello yo!')
        self.assertEqual(page.__name__, 'AnotherPage')
        self.assertEqual(page.__parent__, context)

class EditPageTests(unittest.TestCase):
    def _callFUT(self, context, request):
        from tutorial.views import edit_page
        return edit_page(context, request)

    def test_it_notsubmitted(self):
        context = testing.DummyResource()
        request = testing.DummyRequest()
        info = self._callFUT(context, request)
        self.assertEqual(info['page'], context)
        self.assertEqual(info['save_url'],
                         request.resource_url(context, 'edit_page'))

    def test_it_submitted(self):
        context = testing.DummyResource()
        request = testing.DummyRequest({'form.submitted':True,
                                        'body':'Hello yo!'})
        response = self._callFUT(context, request)
        self.assertEqual(response.location, 'http://example.com/')
        self.assertEqual(context.data, 'Hello yo!')

class FunctionalTests(unittest.TestCase):

    viewer_login = '/login?login=viewer&password=viewer' \
                   '&came_from=FrontPage&form.submitted=Login'
    viewer_wrong_login = '/login?login=viewer&password=incorrect' \
                   '&came_from=FrontPage&form.submitted=Login'
    editor_login = '/login?login=editor&password=editor' \
                   '&came_from=FrontPage&form.submitted=Login'

    def setUp(self):
        import tempfile
        import os.path
        from tutorial import main
        self.tmpdir = tempfile.mkdtemp()

        dbpath = os.path.join( self.tmpdir, 'test.db')
        uri = 'file://' + dbpath
        settings = { 'zodbconn.uri' : uri ,
                     'pyramid.includes': ['pyramid_zodbconn', 'pyramid_tm'] }

        app = main({}, **settings)
        self.db = app.registry.zodb_database
        from webtest import TestApp
        self.testapp = TestApp(app)

    def tearDown(self):
        import shutil
        self.db.close()
        shutil.rmtree( self.tmpdir )

    def test_root(self):
        res = self.testapp.get('/', status=302)
        self.assertEqual(res.location, 'http://localhost/FrontPage')

    def test_FrontPage(self):
        res = self.testapp.get('/FrontPage', status=200)
        self.assertTrue('FrontPage' in res.body)

    def test_unexisting_page(self):
        res = self.testapp.get('/SomePage', status=404)
        self.assertTrue('Not Found' in res.body)

    def test_successful_log_in(self):
        res = self.testapp.get( self.viewer_login, status=302)
        self.assertEqual(res.location, 'http://localhost/FrontPage')

    def test_failed_log_in(self):
        res = self.testapp.get( self.viewer_wrong_login, status=200)
        self.assertTrue('login' in res.body)

    def test_logout_link_present_when_logged_in(self):
        res = self.testapp.get( self.viewer_login, status=302)
        res = self.testapp.get('/FrontPage', status=200)
        self.assertTrue('Logout' in res.body)

    def test_logout_link_not_present_after_logged_out(self):
        res = self.testapp.get( self.viewer_login, status=302)
        res = self.testapp.get('/FrontPage', status=200)
        res = self.testapp.get('/logout', status=302)
        self.assertTrue('Logout' not in res.body)

    def test_anonymous_user_cannot_edit(self):
        res = self.testapp.get('/FrontPage/edit_page', status=200)
        self.assertTrue('Login' in res.body)

    def test_anonymous_user_cannot_add(self):
        res = self.testapp.get('/add_page/NewPage', status=200)
        self.assertTrue('Login' in res.body)

    def test_viewer_user_cannot_edit(self):
        res = self.testapp.get( self.viewer_login, status=302)
        res = self.testapp.get('/FrontPage/edit_page', status=200)
        self.assertTrue('Login' in res.body)

    def test_viewer_user_cannot_add(self):
        res = self.testapp.get( self.viewer_login, status=302)
        res = self.testapp.get('/add_page/NewPage', status=200)
        self.assertTrue('Login' in res.body)

    def test_editors_member_user_can_edit(self):
        res = self.testapp.get( self.editor_login, status=302)
        res = self.testapp.get('/FrontPage/edit_page', status=200)
        self.assertTrue('Editing' in res.body)

    def test_editors_member_user_can_add(self):
        res = self.testapp.get( self.editor_login, status=302)
        res = self.testapp.get('/add_page/NewPage', status=200)
        self.assertTrue('Editing' in res.body)

    def test_editors_member_user_can_view(self):
        res = self.testapp.get( self.editor_login, status=302)
        res = self.testapp.get('/FrontPage', status=200)
        self.assertTrue('FrontPage' in res.body)

Running the Tests

We can run these tests by using setup.py test in the same way we did in Running the 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.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
requires = [
    'pyramid',
    'pyramid_zodbconn',
    'pyramid_tm',
    'pyramid_debugtoolbar',
    'ZODB3',
    'docutils',
    'WebTest', # add this
    ]

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:

On UNIX:

$ ../bin/python setup.py develop

On Windows:

c:\pyramidtut\tutorial> ..\Scripts\python setup.py develop

Once that command has completed successfully, we can run the tests themselves:

On UNIX:

$ ../bin/python setup.py test -q

On Windows:

c:\pyramidtut\tutorial> ..\Scripts\python setup.py test -q

The expected result looks something like:

.........
----------------------------------------------------------------------
Ran 23 tests in 1.653s

OK