AddRunningCommand registers a long running command, e.g.

CountCurrentJobs will return the number of current pending/queued jobs.

NewListCommand prints the list of all queued commands (blocking commands like running Jenkins jobs).

NewQueueCommand is able to execute a command when another blocking process is done e.g.

WaitTillHavingNoQueuedMessage will wait in test context until all background tasks are done.

RunningCommand is a wrapper to sync.WaitGroup to control the behavior of a running command: - when the command is done, call the Done() method - listener can register via Wait() method which is blocking until command is done.