added logout test

tests.py

@@ -52,6 +52,15 @@ class VideoTestCase(unittest.TestCase):
 			assert r.status_code == 403
 			assert 'Login fehlgeschlagen' in r.data.decode()
 
+	def test_logout(self):
+		with self.app as c:
+			with c.session_transaction() as sess:
+				sess['user'] = {'foo': 'bar'}
+			r = c.get('/internal/logout', data={'ref': '/'})
+			assert not flask.session.get('user')
+			assert r.status_code == 302
+			assert '<a href="/">' in r.data.decode()
+	
 	def test_legacyurl(self):
 		with self.app as c:
 			r = self.app.get('/site/feed.php?newcourses')