public async Task GetBytes()
    {
        using (var connection = Connection.OpenConnection())
        {
            await Installer.CreateTable(connection, "MessageAttachments");

            await persister.DeleteAllAttachments(connection, null);

            await persister.SaveStream(connection, null, "theMessageId", "theName", defaultTestDate, GetStream(), metadata);

            byte[] bytes = await persister.GetBytes("theMessageId", "theName", connection, null);

            Assert.Equal(5, bytes[0]);
        }
    }