def test_stored_data_can_be_read(self):
storage = MemoryStorage()
storage.write('foo', b'data')
self.assertEqual(b'data', storage.read('foo'))
def test_stored_data_integrity_is_checked_on_read(self):
storage = MemoryStorage()
storage.write('foo', b'data', md5='foobar')
self.assertRaises(IntegrityError, lambda: storage.read('foo'))
def test_reading_missing_item_raises_error(self):
storage = MemoryStorage()
self.assertRaises(StorageElementNotFoundError, lambda: storage.read_metadata('foo'))
self.assertRaises(StorageElementNotFoundError, lambda: storage.read('foo'))