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So your professor wants you to understand integration testing. And honestly? It's less boring than it sounds. You've got modules. Little chunks of code. Unit testing checks each one alone. Integration testing asks: cool, but do they actually work together? Because they often don't. There are four ways to connect modules up. Big-bang — you slam everything together at once and pray. Fast, chaotic, terrible for finding bugs. Top-down starts from the main program and works down, using stubs to fake