Question

This is the method in question:

public void StartBatchProcessing(IFileBatch fileBatch)
{
    var dataWarehouseFactsMerger = m_dataWarehouseFactsMergerFactory.Create(fileBatch);
    dataWarehouseFactsMerger.Merge();

    if(!m_isTaskStarted)
    {
        m_isTaskStarted = true;
        m_lastQueuedBatchProcessingTask = new TaskFactory().StartNew(() => ProcessBatch(dataWarehouseFactsMerger));
    }
    else
    {
        m_lastQueuedBatchProcessingTask = m_lastQueuedBatchProcessingTask.ContinueWith(previous => ProcessBatch(dataWarehouseFactsMerger));
    }
}

As you can see I’m using TPL to queue tasks one after the other and I would like to test that the tasks will execute in the order they arrive as soon as the previous one finishes.

The ProcessBatch method is protected so I think it could be overwritten in a derived class and be used to set some flag or something and assert that.

All ideas are welcome and appreciated.

Answer 1

You could create an implementation of DataWarehouseFactsMergerFactory that creates implementations of DataWarehouseFactsMerger that are capable of logging which fileBatch was entered and the start time of each task, but for the rest don’t really do anything.