Need of White box Testing

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written 5.2 years ago by

teamques10 ★ 68k

White-box testing techniques are used for testing the module for initial stage testing.Black-box testing is the second stage for testing the software. Though test cases for black box testing can be designed earlier than for white-box testing, they cannot be executed until the code is produced and checked using white-box testing techniques. Thus, white-box testing is not an alternative but an essential stage.
Since white-box testing is complementary to black-box testing, there are categories of bugs that can be revealed by white-box testing, but not through black-box testing. There may be portions in the code, which are not checked when executing functional test cases, but these will be executed and tested by white-box testing.
Errors that come from the design phase will also be reflected in the code and therefore, we must execute white-box test cases for code verification (unit verification).
We often believe that a logical path is not likely to be executed but, in fact, it may be executed on a regular basis. White-box testing explores these paths too.
Some typographical errors are not observed and go undetected and are not covered by black- box testing techniques. White-box testing techniques help detect these errors.

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