I came across a term called as 'Pesticide Paradox' in testing.So just thought of sharing it.
What is the meaning?:
The immunity of the application under test increases !
The same tests (test cases) run over a period of time would start losing their effectiveness to find defects. The developers fix the bugs and the application might reach the saturation in that area or module or functionality.The easy to find and fix defects are discovered and fixed but in the process more subtler bugs are introduced into the system.
What is the solution for it?
To maintain the effectiveness and efficacy of the tests being performed, they need to be revisited time and again and re-written so that the unexposed code is also tested thoroughly.
There can be many permutations and combinations to test a particular system and it is never possible to test it in its entirety. Another effective technique is not to rely solely on the structured and formal techniques but also to perform ad-hoc and exploratory testing to uncover bugs.Think out of box !
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