def test_delete_first_occurence_empty_list(self):
l = LinkedList()
original_python_list = l.to_python_list()
l.deleteFirstOccurence(7)
modified_python_list = l.to_python_list()
self.assertEqual(original_python_list, modified_python_list)
def test_delete_first_occurence(self):
l = LinkedList([1, 2, 2, 3])
l.deleteFirstOccurence(2)
self.assertEqual(l.to_python_list(), [1, 2, 3])
