Added tests for minitwit. Testing with Flask is awesome

examples/minitwit/README

@@ -19,3 +19,8 @@
       3. now you can run the minitwit.py file with your
          python interpreter and the application will
          greet you on http://localhost:5000/
+
+    ~ Is it tested?
+
+      You betcha.  Run the `minitwit_tests.py` file to
+      see the tests pass.

examples/minitwit/minitwit.py

@@ -216,7 +216,7 @@ def register():
         elif not request.form['password']:
             error = 'You have to enter a password'
         elif request.form['password'] != request.form['password2']:
-            error = 'The two passwords to not match'
+            error = 'The two passwords do not match'
         elif get_user_id(request.form['username']) is not None:
             error = 'The username is already taken'
         else:

examples/minitwit/minitwit_tests.py

@@ -0,0 +1,145 @@
+# -*- coding: utf-8 -*-
+"""
+    MiniTwit Tests
+    ~~~~~~~~~~~~~~
+
+    Tests the MiniTwit application.
+
+    :copyright: (c) 2010 by Armin Ronacher.
+    :license: BSD, see LICENSE for more details.
+"""
+import minitwit
+import unittest
+import tempfile
+from contextlib import closing
+
+
+class MiniTwitTestCase(unittest.TestCase):
+
+    def setUp(self):
+        """Before each test, set up a blank database"""
+        self.db = tempfile.NamedTemporaryFile()
+        self.app = minitwit.app.test_client()
+        minitwit.DATABASE = self.db.name
+        minitwit.init_db()
+
+    # helper functions
+
+    def register(self, username, password, password2=None, email=None):
+        """Helper function to register a user"""
+        if password2 is None:
+            password2 = password
+        if email is None:
+            email = username + '@example.com'
+        return self.app.post('/register', data={
+            'username':     username,
+            'password':     password,
+            'password2':    password2,
+            'email':        email,
+        }, follow_redirects=True)
+
+    def login(self, username, password):
+        """Helper function to login"""
+        return self.app.post('/login', data={
+            'username': username,
+            'password': password
+        }, follow_redirects=True)
+
+    def register_and_login(self, username, password):
+        """Registers and logs in in one go"""
+        self.register(username, password)
+        return self.login(username, password)
+
+    def logout(self):
+        """Helper function to logout"""
+        return self.app.get('/logout', follow_redirects=True)
+
+    def add_message(self, text):
+        """Records a message"""
+        rv = self.app.post('/add_message', data={'text': text},
+                                    follow_redirects=True)
+        if text:
+            assert 'Your message was recorded' in rv.data
+        return rv
+
+    # testing functions
+
+    def test_register(self):
+        """Make sure registering works"""
+        rv = self.register('user1', 'default')
+        assert 'You were successfully registered ' \
+               'and can login now' in rv.data
+        rv = self.register('user1', 'default')
+        assert 'The username is already taken' in rv.data
+        rv = self.register('', 'default')
+        assert 'You have to enter a username' in rv.data
+        rv = self.register('meh', '')
+        assert 'You have to enter a password' in rv.data
+        rv = self.register('meh', 'x', 'y')
+        assert 'The two passwords do not match' in rv.data
+        rv = self.register('meh', 'foo', email='broken')
+        assert 'You have to enter a valid email address' in rv.data
+
+    def test_login_logout(self):
+        """Make sure logging in and logging out works"""
+        rv = self.register_and_login('user1', 'default')
+        assert 'You were logged in' in rv.data
+        rv = self.logout()
+        assert 'You were logged out' in rv.data
+        rv = self.login('user1', 'wrongpassword')
+        assert 'Invalid password' in rv.data
+        rv = self.login('user2', 'wrongpassword')
+        assert 'Invalid username' in rv.data
+
+    def test_message_recording(self):
+        """Check if adding messages works"""
+        self.register_and_login('foo', 'default')
+        self.add_message('test message 1')
+        self.add_message('<test message 2>')
+        rv = self.app.get('/')
+        assert 'test message 1' in rv.data
+        assert '&lt;test message 2&gt;' in rv.data
+
+    def test_timelines(self):
+        """Make sure that timelines work"""
+        self.register_and_login('foo', 'default')
+        self.add_message('the message by foo')
+        self.logout()
+        self.register_and_login('bar', 'default')
+        self.add_message('the message by bar')
+        rv = self.app.get('/public')
+        assert 'the message by foo' in rv.data
+        assert 'the message by bar' in rv.data
+
+        # bar's timeline should just show bar's message
+        rv = self.app.get('/')
+        assert 'the message by foo' not in rv.data
+        assert 'the message by bar' in rv.data
+
+        # now let's follow foo
+        rv = self.app.get('/foo/follow', follow_redirects=True)
+        assert 'You are now following &#34;foo&#34;' in rv.data
+
+        # we should now see foo's message
+        rv = self.app.get('/')
+        assert 'the message by foo' in rv.data
+        assert 'the message by bar' in rv.data
+
+        # but on the user's page we only want the user's message
+        rv = self.app.get('/bar')
+        assert 'the message by foo' not in rv.data
+        assert 'the message by bar' in rv.data
+        rv = self.app.get('/foo')
+        assert 'the message by foo' in rv.data
+        assert 'the message by bar' not in rv.data
+
+        # now unfollow and check if that worked
+        rv = self.app.get('/foo/unfollow', follow_redirects=True)
+        assert 'You are no longer following &#34;foo&#34;' in rv.data
+        rv = self.app.get('/')
+        assert 'the message by foo' not in rv.data
+        assert 'the message by bar' in rv.data
+
+
+if __name__ == '__main__':
+    unittest.main()

flask.py

@@ -265,9 +265,8 @@ def run(self, host='localhost', port=5000, **options):
         options.setdefault('use_debugger', self.debug)
         return run_simple(host, port, self, **options)
 
-    @cached_property
-    def test(self):
-        """A test client for this application"""
+    def test_client(self):
+        """Creates a test client for this application"""
         from werkzeug import Client
         return Client(self, self.response_class, use_cookies=True)