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Comparisons of Test Strategies

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Comparison of Testing Strategies Vernon Parker

GUT1 Object Oriented Design and Development

Vernon Parker

White Box Testing
White box testing strategy deals with the internal logic and structure of the code. It is also called glass, structural, open or clear box testing. The tests that are written based on the white box testing strategy incorporate coverage of the code written, branches, paths, statements and internal logic of the code, etc. In order to implement white box testing, the tester has to deal with the code, and hence is required 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.

In other words, it is imperative that the tester has 'structural' knowledge about how the system has been implemented. Not only the code, but even the data flow and control flow have to be assessed. The areas of the code, that are tested using white box testing are: a. Code Coverage b. Segment Coverage c. Branch Coverage d. Condition Coverage e. Loop Coverage f. Path Testing g. Data Flow Coverage
There are three aspects of the code, which are validated in white box testing, namely i. If the software has been designed as per the original design of the software. ii. If security measures have been implemented into the software and it is robust. iii. Find out vulnerabilities in the said software.
Advantages of White Box Testing * 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. * Yet another advantage of white box testing is that it helps in optimizing the code. * It helps in removing the extra lines of code,

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