def test_exists_method(self):
linked_list = LinkedList()
find_me = {'foo4': 'bar', 'bar': 123}
self.assertFalse(linked_list.exists(find_me))
linked_list.insert(find_me)
self.assertTrue(linked_list.exists(find_me))
def test_deleting_an_item(self):
linked_list = LinkedList()
jane = Student("Doe", "Jane", "123-123-1234", "*****@*****.**", 23)
john = Student("Doe", "John", "223-123-1234", "*****@*****.**", 23)
jake = Student("Doe", "Jake", "323-123-1234", "*****@*****.**", 23)
dummy_john = StudentFactory.create_dummy_from_ssn("223-123-1234")
self.assertFalse(linked_list.delete(dummy_john))
self.assertTrue(linked_list.insert(jane))
self.assertTrue(linked_list.insert(john))
self.assertTrue(linked_list.insert(jake))
# return
self.assertEqual(3, linked_list.size())
self.assertTrue(linked_list.delete(dummy_john))
self.assertFalse(linked_list.exists(dummy_john))
self.assertEqual(2, linked_list.size())
def test_finding_an_existing_element(self):
linked_list = LinkedList()
the_item = {'foo': 'bar'}
self.assertFalse(linked_list.exists(the_item))
linked_list.insert(the_item)
self.assertTrue(linked_list.exists(the_item))