def test_integration(self):
history = History([0])
self.assertTrue(history.prev()) # 0
self.assertTrue(history.browsing())
self.assertTrue(history.remove(0))
self.assertFalse(history.browsing())
self.assertEqual(history.size(), 0)
history.push(1)
history.push(2)
self.assertTrue(history.prev()) # 2
self.assertTrue(history.prev()) # 1
self.assertTrue(history.browsing())
self.assertEqual(history.current_item(), 1)
self.assertTrue(history.remove(2))
self.assertEqual(history.current_item(), 1)
self.assertFalse(history.next())
self.assertFalse(history.browsing())
def test_push(self):
history = History()
history.push(0)
self.assertEqual(history.current_item(), 0)
self.assertFalse(history.browsing())
def test_push_duplicate(self):
history = History([0, 1])
history.push(1)
self.assertEqual(history.current_item(), 0)