what is system integration testing
In the context of software systems and software engineering, system integration testing (SIT) is a testing process that exercises a software system's coexistence with others.With multiple integrated systems, assuming that each have already passed system testing, SIT proceeds to test their required interactions.Following this, the deliverables are passed on to acceptance testing.ith multiple integrated systems, assuming that each have already passed system testing, SIT proceeds to test their required interactions. Following this, the deliverables are passed on to acceptance testing.