def test_pop_back_when_single_item_linkedlist(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
# Act
linkedlist.pop_back()
# Assert
self.assertTrue(linkedlist.size() == 0)
self.assertRaises(ValueError, linkedlist.find, "Umair")
def test_pop_back_when_more_than_one_items_linkedlist(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
linkedlist.push_back("Aamir")
# Act
linkedlist.pop_back()
# Assert
self.assertTrue(linkedlist.size() == 1)
self.assertRaises(ValueError, linkedlist.find, "Aamir")