'Flask' object has no attribute 'post' error for login unit test

Question

I am trying to test my log in functionality with Flask-Testing. I'm following the Flask docs on testing as well. The test_login() function raises AttributeError: 'Flask' object has no attribute 'post'. Why am I getting this error?

Traceback (most recent call last):
  File "/home/lucas/PycharmProjects/FYP/Shares/tutorial/steps/test.py", line 57, in test_login_logout
rv = self.login('lucas', 'test') <br> <br>
  File "/home/lucas/PycharmProjects/FYP/Shares/tutorial/steps/test.py", line 47, in login
return self.app.post('/login', data=dict(
AttributeError: 'Flask' object has no attribute 'post'

from flask.ext.testing import TestCase
from flask import Flask
from Shares import db
import manage

class test(TestCase):

def create_app(self):

    app = Flask(__name__)
    app.config['TESTING'] = True
    return app

SQLALCHEMY_DATABASE_URI = "sqlite://"
TESTING = True

def setUp(self):
    manage.initdb()

def tearDown(self):
    db.session.remove()
    db.drop_all()

def test_adduser(self):
    user = User(username="test", email="[email protected]")
    user2 = User(username="lucas", email="[email protected]")

    db.session.add(user)
    db.session.commit()

    assert user in db.session
    assert user2 not in db.session

def login(self, username, password):
    return self.app.post('/login', data=dict(
        username=username,
        password=password
    ), follow_redirects=True)

def logout(self):
    return self.app.get('/logout', follow_redirects=True)

def test_login(self):
    rv = self.login('lucas', 'test')
    assert 'You were logged in' in rv.data

Answer 1

It looks like Flask-Testing magically sets up a special app client object on the TestCase instance named self.client. Change all self.app to self.client and it should fix that issue.

Eg:

def login(self, username, password):
    return self.app.post('/login', data=dict(
        username=username,
        password=password
    ), follow_redirects=True)

to:

def login(self, username, password):
        return self.client.post('/login', data=dict(
            username=username,
            password=password
        ), follow_redirects=True)

Answer 2

While writing tests for my Flask app I came across a similar problem.

Only from debugging I saw that there was no "config" attribute instead I had to go self.app.application.config

Not sure why it's missing, I've usually always done self.app.config just like in the production code

import unittest

from factory import create_app


class ConfigTests(unittest.TestCase):

    def setUp(self):
        app = create_app('flask_test.cfg')
        app.testing = True
        self.app = app.test_client()

    def test_app_is_development(self):
        self.assertFalse(self.app.application.config['SECRET_KEY'] is 'secret_key')
        self.assertTrue(self.app.application.config['DEBUG'] is True)