'can retrieve an item by a location key, using a ccx block usage key
the retrieved item should be the same as the the one read without ccx
info'

def test_get_item(self):

    for expected in chain(self.chapters, self.sequentials, self.verticals, self.blocks):
        block_key = self.ccx_locator.make_usage_key(expected.location.block_type, expected.location.block_id)
        actual = self.store.get_item(block_key)
        self.assertEqual(expected.display_name, actual.display_name)
        self.assertEqual(expected.location, actual.location.to_block_locator())
