tests.py

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

class TestConfig(Config):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = 'sqlite://'

class UserModelCase(unittest.TestCase):
    def setUp(self):
        self.app = create_app(TestConfig)
        self.app_context = self.app.app_context()
        self.app_context.push()
        db.create_all()
    
    def tearDown(self):
        db.session.remove()
        db.drop_all()
        self.app_context.pop()

    def test_password_hashing(self):
        u = User(username ='ram')
        u.set_password('ram')
        self.assertFalse(u.check_password('mar'))
        self.assertTrue(u.check_password('ram'))

    def test_avatar(self):
        u = User(username = 'ramu',email = 'ram@ramayan.com')
        self.assertEqual(u.avatar(128),('https://www.gravatar.com/avatar/90ed99879ec18edd1749c11db92d1fbb?d=identicon&s=128'))

    def test_follow(self):
        u1 = User(username = 'ram', email = 'ram@ramayan.com')
        u2 = User(username = 'lakshman', email = 'lakshman@ramayan.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, 'lakshman')
        self.assertEqual(u2.followers.count(), 1)
        self.assertEqual(u2.followers.first().username, 'ram')

        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 = 'ram', email = 'ram@ramayan.com')
        u2 = User(username = 'lakshman', email = 'lakshman@ramayan.com')
        u3 = User(username =  'bharat', email = 'bharat@ramayan.com')
        u4 = User(username = 'shatrugan', email = 'shatrugan@ramayan.com')
        db.session.add_all([u1, u2, u3, u4])

        now = datetime.utcnow()
        p1 = Post(caption="by ram", author=u1,
                  timestamp=now + timedelta(seconds=1))
        p2 = Post(caption="by lakshman ", author=u2,
                  timestamp=now + timedelta(seconds=4))
        p3 = Post(caption="by bharat", author=u3,
                  timestamp=now + timedelta(seconds=3))
        p4 = Post(caption="by shatrugan", 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)