A software testing phase where individual modules are combined and tested as a group to detect interface defects. It verifies that different components work together correctly when integrated.
From Latin 'integratus' (made whole) and 'test'. The term evolved in the 1960s as software systems became more complex and required multiple modules to work together seamlessly.
Integration testing is like checking if your new sound system works with your TV - each device might work perfectly alone, but the real test is whether they communicate properly together. Most software bugs actually hide in these integration points!
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