def test_push_front_when_single_item_linked_list(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_front("Umair")
# Act
pushed = linkedlist.push_front("Aamir")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 2)
self.assertTrue(linkedlist.head.data == "Aamir")
def test_push_front_when_more_than_one_items_linked_list(self):
# Arrange
linkedlist = LinkedList()
linkedlist.push_front("Umair")
linkedlist.push_front("Aamir")
# Act
pushed = linkedlist.push_front("Rayan")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 3)
self.assertTrue(linkedlist.head.data == "Rayan")
def test_push_front_when_empty_linked_list(self):
# Arrange
linkedlist = LinkedList()
# Act
pushed = linkedlist.push_front("Umair")
# Assert
self.assertTrue(pushed)
self.assertTrue(linkedlist.size() == 1)
self.assertTrue(linkedlist.find("Umair"))
