fixed typos and added tests for db and auth

tests/conftest.py

@@ -32,4 +32,21 @@ def client(app):
 
 @pytest.fixture
 def runner(app):
-    return app.test_client()
+    return app.test_cli_runner()
+
+class AuthActions(object):
+    def __init__(self, client):
+        self._client = client
+
+    def login(self, username='test', password='test'):
+        return self._client.post(
+                'auth/login',
+                data={'username': username, 'password': password}
+        )
+
+    def logout(self):
+        return self._client.get('auth/logout')
+
+@pytest.fixture
+def auth(client):
+    return AuthActions(client)