public async Task A_consumer_is_being_tested() { _harness = new InMemoryTestHarness(); _batchConsumer = new TestBatchConsumer(_harness.GetTask <Batch <PingMessage> >()); _consumer = _harness.Consumer(() => _batchConsumer, c => c.Options <BatchOptions>(o => o.SetMessageLimit(2))); await _harness.Start(); }