def test_CanUnlockCard(self):
c = Card()
c.lock()
c.unlock()
self.assertFalse(c.IsLocked)
def test_CanNotPullBlockedCard(self):
column1 = Column()
card = Card()
card.lock()
column1.push(card)
column2 = Column()
column2.pull_from(column1)
self.assertEqual(len(column1.Cards), 1)
self.assertEqual(len(column2.Cards), 0)
def test_CanLockCard(self):
c = Card()
c.lock()
self.assertTrue(c.IsLocked)