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Working with several customers over the past years, one of the NFR being enforced by customers is Code Coverage, some customers push for 80% while some others ask for 90%. Even had a client which asks for 95% in older days. Also, there is significant cost and effort involved with increasing coverage compliance. And once the said coverage is achieved, its assumed the code is good and safe. Testability of code is a whole story alltogether that deserves a post separately, this post targets more of coverage part.

Offcourse 100% is something next to impossible and thats what nobody dares it to ask or enforce. And this gives a margin for 5 or 10% or even 20% and here comes the problem set of problems. Lets deep dive in, consider the following code.

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