Explain White box testing

White-box testing, sometimes called glass-box testing, is a test-case design philosophy that uses the control structure described as part of component-level design to derive test cases. Using white-box testing methods, you can derive test cases that

  • Guarantee that all independent paths within a module have been exercised at least once
  • Exercise all logical decisions on their true and false sides
  • Execute all loops at their boundaries and within their operational bounds
  • Exercise internal data structures to ensure their validity

White Box Testing method is applicable to the following levels of software testing:

  • It is mainly applied to Unit testing and Integration testing
  • Unit Testing: For testing paths within a unit
  • Integration Testing: For testing paths between units
  • System Testing: For testing paths between subsystems

White box testing advantages

  • Testing can be commenced at an earlier One need not wait for the GUI to be available.
  • Testing is more thorough, with the possibility of covering most paths

White box testing disadvantages

  • Since tests can be very complex, highly skilled resources are required, with thorough knowledge of programming and implementation
  • Test script maintenance can be a burden if the implementation changes too frequently
  • Since this method of testing it closely tied with the application being testing, tools to cater to every kind of implementation/platform may not be readily available

Leave a Reply