My CI testing follows what Mark outlines.??
My code is in Java.? I wrote a broker interface which limits the IB API pieces I use.? I then use a mock class framework (Mockito) to simulate responses.? This of course doesn't simulate TWS, but at least allows for testing of my code.
But sometimes weird things happen in production and TWS doesn't do what you expect, so an idea I had was to implement a TWS API "recorder" so I can record/replay IB API events to diagnose problems that come up in production.? Then use those event records to generate test cases.
