tests.py

from datetime import datetime , timedelta
import unittest
from app import app , db
from app.models import User , Post

class UserModelCase(unittest.TestCase):

    def setUp(self):
        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite://'
        db.create_all()

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

    def test_password_hashing(self):
        u = User(username = 'susan')
        u.set_password('cat')
        self.assertFalse(u.check_password('dog'))
        self.assertTrue(u.check_password('cat'))

    def test_avatar(self):
        u = User(username = 'john' , email = 'john@example.com')
        self.assertEqual(u.avatar(128) , ('https://www.gravatar.com/avatar/'
                                         'd4c74594d841139328695756648b6bd6'
                                         '?d=identicon&s=128'))

    def test_follow(self):
        u1 = User(username = 'john' , email = 'john@example.com')
        u2 = User(username = 'susan' , email = 'susan@example.com')
        db.session.add(u1)
        db.session.add(u2)
        db.session.commit()
        self.assertEqual(u1.followed.all() , [])
        self.assertEqual(u1.followers.all() , [])

        u1.follow(u2)
        db.session.commit()
        self.assertTrue(u1.is_following(u2))
        self.assertEqual(u1.followed.count() , 1)
        self.assertEqual(u1.followed.first().username , 'susan')
        self.assertEqual(u2.followers.count() , 1)
        self.assertEqual(u2.followers.first().username , 'john')

        u1.unfollow(u2)
        db.session.commit()
        self.assertFalse(u1.is_following(u2))
        self.assertEqual(u1.followed.count() , 0)
        self.assertEqual(u2.followers.count() , 0)

    def test_follow_posts(self):
        u1 = User(username = 'john' , email = 'john@example.com')
        u2 = User(username = 'susan' , email = 'susan@example.com')
        u3 = User(username = 'mary' , email = 'mary@example.com')
        u4 = User(username = 'david' , email = 'david@example.com')
        db.session.add_all([u1,u2,u3,u4])

        now = datetime.utcnow()
        p1 = Post(body = "post from john" , author = u1 , timestamp = now + timedelta(seconds = 1))
        p2 = Post(body = "post from susan" , author = u2 , timestamp = now + timedelta(seconds = 4))
        p3 = Post(body = "post from mary" , author = u3 , timestamp = now + timedelta(seconds = 3))
        p4 = Post(body = "post from david" , author = u4 , timestamp = now + timedelta(seconds = 2))
        db.session.add_all([p1 , p2 , p3 , p4])
        db.session.commit()

        u1.follow(u2)
        u1.follow(u4)
        u2.follow(u3)
        u3.follow(u4)
        db.session.commit()

        f1 = u1.followed_posts().all()
        f2 = u2.followed_posts().all()
        f3 = u3.followed_posts().all()
        f4 = u4.followed_posts().all()
        self.assertEqual(f1 , [p2 , p4 , p1])
        self.assertEqual(f2 , [p2 , p3])
        self.assertEqual(f3 , [p3 , p4])
        self.assertEqual(f4 , [p4])


if __name__ == '__main__':
    unittest.main(verbosity = 2)