def test__delitem__existing_index__element_returned(self):
custom_list = CustomList()
custom_list.append(1)
deleted = custom_list[0]
del custom_list[0]
self.assertEqual(1, deleted)
def test__sort__unsorted_list__ascending(self):
custom_list = CustomList()
custom_list.append(3)
custom_list.append(2)
custom_list.append(1)
CustomList.sort(custom_list, lambda x, y: x <= y)
self.assertEqual(custom_list[0], 1)
def test__iter__no_elements__0_iterations(self):
custom_list = CustomList()
count = 0
for object in custom_list:
count += 1
self.assertEqual(count, 0)
def test__filter__all_fail__count_0(self):
custom_list = CustomList()
custom_list.append(1)
custom_list.append(2)
custom_list.append(3)
CustomList.filter(custom_list, lambda x: x == 4)
self.assertEqual(0, custom_list.count)
def test__filter__all_pass__count_same(self):
custom_list = CustomList()
custom_list.append(1)
custom_list.append(2)
custom_list.append(3)
initial_count = 3
CustomList.filter(custom_list, lambda x: x < 4)
self.assertEqual(initial_count, custom_list.count)
def test__iter__5_elements__5_iterations(self):
custom_list = CustomList()
custom_list.append(1)
custom_list.append(1)
custom_list.append(1)
custom_list.append(1)
custom_list.append(1)
count = 0
for object in custom_list:
count += 1
self.assertEqual(count, 5)
def test__iter__3_elements_before_delete__2_iterations(self):
custom_list = CustomList()
custom_list.append(1)
custom_list.append(1)
custom_list.append(1)
del custom_list[0]
count = 0
for object in custom_list:
count += 1
self.assertEqual(count, 2)
def test__setitem__non_existing_index__index_error(self):
custom_list = CustomList()
self.assertRaises(IndexError, custom_list.__setitem__, 0, 0)
def test__setitem__existing_index__successful_update(self):
custom_list = CustomList()
custom_list.append(1)
custom_list[0] = 2
self.assertEqual(2, custom_list[0])
def test__count__empty_list__0__ok(self):
custom_list = CustomList()
self.assertEqual(0, custom_list.count)
def test__delitem__non_existing_index__exception(self):
custom_list = CustomList()
self.assertRaises(IndexError, custom_list.__delitem__, 0)
def test__delitem__existing_index__count_updates(self):
custom_list = CustomList()
custom_list.append(1)
del custom_list[0]
self.assertEqual(0, custom_list.count)
def test__append__count_changes(self):
custom_list = CustomList()
custom_list.append(1)
self.assertEqual(1, custom_list.count)
def test__get_item__not_empty_list__existing_index__no_exception(self):
custom_list = CustomList()
custom_list.append(1)
self.assertEqual(1, custom_list[0])
def test__get_item__empty_list__exception(self):
custom_list = CustomList()
self.assertRaises(IndexError, custom_list.__getitem__, 1)