Integration testing is defined as the testing of joint parts of an application to decide if they function appropriately.
Integration testing can be performed in two methods:
1. Bottom-up integration testing: This testing commences with unit testing, followed by tests of gradually higher-level combinations of units called modules or builds.
2. Top-down integration testing: In this testing, the highest-level modules or builds are tested first and gradually, lower-level modules are tested afterward.
Bottom-up testing is generally done first, followed by top-down testing in a complete software development environment. The process ends with multiple tests of the whole application.
1. Bottom-up integration testing: This testing commences with unit testing, followed by tests of gradually higher-level combinations of units called modules or builds.
2. Top-down integration testing: In this testing, the highest-level modules or builds are tested first and gradually, lower-level modules are tested afterward.
Bottom-up testing is generally done first, followed by top-down testing in a complete software development environment. The process ends with multiple tests of the whole application.
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