def test_items(self, mock_open):
reader = oc.ContentsReader("filename")
reader.close = mock.MagicMock()
items = ['a', 'b', 'c', 'd']
reader._items = items
self.assertEqual(list(reader.items()), items)
reader.close.assert_called_once()
def test_close(self, mock_open):
reader = oc.ContentsReader("filename")
reader.close()
mock_open.return_value.close.assert_called_once()
def test_init(self, mock_open):
reader = oc.ContentsReader("filename")
mock_open.assert_called_with("filename", "r")
self.assertIsNotNone(reader.file)