public void ShouldSendSync()
        {
            var sync = JsonStrings.CommandSyncOut();
            var format = Substitute.For<IProtocolWriterFormat>();
            format.Sync().Returns(sync);

            var writer = Substitute.For<IWriteNext>();
            var reader = Substitute.For<IStormReader>();

            var subjectUnderTest = new StandardSpoutWriter(writer, format, reader);
            subjectUnderTest.Sync();

            writer.Received().Write(sync);
        }