White box testing strategy
deals with the internal logic and structure of the code. White box testing is
also called as glass, structural, open box or clear box testing. The tests
written based on the white box testing strategy incorporate coverage of the code
written, branches, paths, statements and internal logic of the code etc.
A D V E R T I S E M E N T
In order to implement white box testing, the tester has to deal with the code
and hence is needed to possess knowledge of coding and logic i.e. internal
working of the code. White box test also needs the tester to look into the code
and find out which unit/statement/chunk of the code is malfunctioning.
Advantages of White box testing are:
As the knowledge of
internal coding structure is prerequisite, it becomes very easy to find out
which type of input/data can help in testing the application effectively.
The other advantage of
white box testing is that it helps in optimizing the code
It helps in removing the
extra lines of code, which can bring in hidden defects.
Disadvantages of white box testing are:
As knowledge of code and
internal structure is a prerequisite, a skilled tester is needed to carry
out this type of testing, which increases the cost.
It is
nearly impossible to look into every bit of code to find out hidden errors,
which may create problems, resulting in failure of the application.
