def test_update_when_when_non_empty_linked_list_and_item_is_present(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
# Act
updated = linkedlist.update("Umair", "Usman")
# Assert
self.assertTrue(updated)
self.assertTrue(linkedlist.find("Usman"))
def test_find_when_when_non_empty_linked_list_and_item_is_present(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
# Act
found = linkedlist.find("Umair")
# Assert
self.assertTrue(found)
self.assertEqual("Umair", found.data)
def test_push_back_when_empty_linked_list(self):
# Arrange
linkedlist = LinkedList()
# Act
pushed = linkedlist.push_back("Umair")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 1)
self.assertTrue(linkedlist.find("Umair"))
def test_push_back_when_single_item_linked_list(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
# Act
pushed = linkedlist.push_back("Aamir")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 2)
self.assertTrue(linkedlist.find("Aamir"))
def test_push_back_when_more_than_two_items_linked_list(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_back("Umair")
linkedlist.push_back("Usman")
linkedlist.push_back("Rayan")
# Act
pushed = linkedlist.push_back("Aamir")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 4)
self.assertTrue(linkedlist.find("Aamir"))
