Software Testing Tutorial | White Box Testing Introduction

Introduction

White box testing is the detailed investigation of internal logic and structure of the code. White box testing is also called glass testing or open box testing. In order to perform white box testing on an application, the tester needs to possess knowledge of the internal working of the code.

The tester needs to have a look inside the source code and find out which unit/chunk of the code is behaving inappropriately.

Advantages Disadvantages
  • As the tester has knowledge of the source code, it becomes very easy to find out which type of data can help in testing the application effectively.
  • It helps in optimizing the code.
  • Extra lines of code can be removed which can bring in hidden defects.
  • Due to the tester’s knowledge about the code, maximum coverage is attained during test scenario writing.
  • Due to the fact that a skilled tester is needed to perform white box testing, the costs are increased.
  • Sometimes it is impossible to look into every nook and corner to find out hidden errors that may create problems as many paths will go untested.
  • It is difficult to maintain white box testing as the use of specialized tools like code analyzers and debugging tools are required.

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