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What is a stub in software testing?

Updated: 10/3/2023
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Venuv

Lvl 1
16y ago

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Stubs are dummy modules that are always distinguished as "called programs", or you can say that is handle in integration testing (top down approach), it used when sub programs are under construction. Stubs are considered as the dummy modules that always simulate the low level modules.

Drivers are also considered as the form of dummy modules which are always distinguished as "calling programs", that is handled in bottom up integration testing, it is only used when main programs are under construction. Drivers are considered as the dummy modules that always simulate the high level modules.

Example of Stubs and Drivers:-

For example, we have 3 modules login, home, and user module. Login module is ready and need to test it, but we call functions from home and user (which is not ready). To test at a selective module we write a short dummy piece of a code which simulates home and user, which will return values for Login, this piece of dummy code is always called Stubs and it is used in a top down integration.

Considering the same example above: If we have Home and User modules get ready and Login module is not ready, and we need to test Home and User modules Which return values from Login module, So to extract the values from Login module We write a Short Piece of Dummy code for login which returns value for home and user, So these pieces of code is always called Drivers and it is used in Bottom Up Integration.

Most of the software testing companies prefer to use Driver instead of Stub. But, its depends on the mindset of QA, what he wants.

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Wiki User

7y ago
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Wiki User

16y ago

A Stub is a special code arrangement when called by any other module, stimulates the behavior of an well designed and existing module which is not yet constructed or developed.

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