Evan Reynolds created SCXML-189:
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Summary: Event Replay Scheduler
Key: SCXML-189
URL: https://issues.apache.org/jira/browse/SCXML-189
Project: Commons SCXML
Issue Type: New Feature
Reporter: Evan Reynolds
Priority: Minor
It can be very hard to unit test state machines that have timers. It can also
be hard to replay events in a timely fashion - you hit the timer, and unless
you're willing to wait, you can't test.
This is a timer class that I used that acts as a normal event dispatcher. But
instead of firing events on a normal schedule, it makes a call available to
register the current time. If you call that with new time values, it will fire
off any events that have been started that need to be fired off.
So to use this to replay events, simply register the time the event happened,
then fire the event. All timers will then take care of themselves. To use it to
unit test events, you can go into a state with a timer, call the register time
method to move the clock up until the timer should fire, and watch to see what
happens.
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