def test__get_reusable_content_same_owner_with_magic(self):
        """Test update_content will reuse owned content."""
        hash_value = self.factory.get_fake_hash()
        node = self._make_file_with_content(hash_value, magic_hash=b'magic')
        blobexists, blob = self.gw._get_reusable_content(hash_value, 'magic')
        self.assertTrue(blobexists)
        self.assertEqual(bytes(blob.hash), node.content_hash)