RecentlyUsedList-tests

tests.py

import unittest

from recently_used_list import RecentlyUsedList

class RULTests(unittest.TestCase):

    def setUp(self):
        self.rul = RecentlyUsedList()

    def test_new_RUL_gives_empty_list(self):
        self.assertEqual(len(self.rul), 0)

    def test_insert_adds_item_to_list(self):
        self.rul.insert('First')
        self.assertEqual(len(self.rul), 1)

    def test_get_first_item(self):
        self.rul.insert('First')
        self.assertEqual(self.rul[0], 'First')

    def test_RUL_is_listifiable(self):
        list(self.rul)

    def test_if_list_is_equal_to_empty_list(self):
        self.assertEqual(len(list(self.rul)), len([]))

    def test_adding_3_items_gives_list_of_length_3(self):
        self.rul.insert('First')
        self.rul.insert('Second')
        self.rul.insert('Third')
        self.assertEqual(len(self.rul), 3)

    def test_items_are_added_in_filo_order(self):
        self.rul.insert('First')
        self.rul.insert('Second')
        self.assertEqual(self.rul[0], 'Second')

    def test_adding_duplicate_item_does_not_change_len(self):
        self.rul.insert('First')
        self.rul.insert('Second')
        self.rul.insert('First')
        self.assertEqual(len(self.rul), 2)

    def test_adding_duplicate_item_moves_it_to_front(self):
        self.rul.insert('First')
        self.rul.insert('Second')
        self.rul.insert('First')
        self.assertEqual(self.rul[0], 'First')