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Explain Test Driver and Test Stub.

Answer»

A test driver and a test stub are both types of test harnesses that simulate an environment for testing a module or component. Both are dummy modules designed specifically for testing. 



  • Test stubs: A test stub is used in a top-down testing approach and allows testing of the upper levels of code when the lower code levels have not been developed yet. It serves as a 'called program' when subprograms are being developed. 


  • Test drivers: A test driver is used in a bottom-up testing approach and allows testing of the lower levels of the code when the upper code levels have not been developed yet. It serves as a 'called program' when main programs are being developed.


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