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Integration Testing vs System Testing – Where’s the Line?
A lot of testers (and even developers) get confused about where <strong data-start=”260″ data-end=”283″>integration testing ends and <strong data-start=”293″ data-end=”311″>system testing begins. Both are higher-level testing methods compared to unit tests, but they serve different purposes in the software lifecycle.
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<strong data-start=”448″ data-end=”471″>Integration Testing focuses on verifying how multiple modules or services interact. The aim is to ensure that interfaces, data exchanges, and workflows between components function correctly. For example, checking if your API layer correctly communicates with the database.
<strong data-start=”729″ data-end=”747″>System Testing, on the other hand, validates the behavior of the <em data-start=”798″ data-end=”813″>entire system against requirements. It’s broader in scope and checks aspects like user flows, performance, security, and end-to-end functionality under realistic conditions.
Think of integration testing as checking the “wiring” between parts of a machine, while system testing checks whether the machine as a whole does what it’s supposed to do. Both are critical, but skipping integration testing often means system tests uncover problems that could’ve been caught much earlier (and cheaper to fix).
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