CSC/ECE 517 Fall 2009/wiki1b 4 xy

Integration testing: Integration testing is the next phase of unit testing. Generally in software development complete software is divided into various sub-systems mostly developed by different teams. More often than not each sub-system works very well individually but when they are integrated then lot of problems.

There are many approaches that can be followed for Integration Testing

• Big-Bang: As the name suggests all the components are integrated at once. After all the integration is completed a set of tests are run which not only validate a single component of sub-system but also test and validate the interaction between different components.
  • Disadvantages:

Debugging and solving a fault is not that trivial. Because since this type of testing is done for the first time one cannot be sure whether the bug found was present in any sub-system or interaction between different sub-systems. Testing process cannot be started until all the sub-systems have finished their development. Writing test cases are also non-trivial.

• Incremental Testing: As the name suggests testing is done after integration of one sub-system at a time. This solves the disadvantages of the Big-Bang.
  • Disadvantages:

This approach is a time taking process. For a large system