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Module & Components Integration Testing Phase
Module components are integrated and tested as assemblies to validate that
all of the units work well together.
After all units have been tested in isolation and verified working correctly, the next of testing begins: Integration Testing.
Two Possible Processes
- Two modules integrated and tested
- Another module added to them and tested
- Continues until all units are added
Or
- Units grouped by functional area
- Tested together as assemblies
Top Down Testing
- Top layers tested
- Lower layer integrated and tested
- Process continues until full integration
Bottom Up Testing
- Lowest levels validated
- Higher level component integrated and tested
- Process continues until full integration
By testing the units in aggregate, it’s easier to identify the source of the issues found.
Defects general found in this phase
- Inter-process communication
- Parameter issues
- Data issues
Testers involved in this phase should have a solid background in integration testing techniques.
