Advantages and disadvantages of black box testing

Black box testing advantages

  • Tests are done from a user’s point of view and will help in exposing discrepancies in the specifications
  • Tester need not know programming languages or how the software has been implemented
  • Tests can be conducted by a body independent from the developers, allowing for an objective perspective and the avoidance of developer-bias.
  • Test cases can be designed as soon as the specifications are complete

Black box testing disadvantages

  • Only a small number of possible inputs can be tested and many program paths will be left untested
  • Without clear specifications, which is the situation in many projects, test cases will be difficult to design
  • Tests can be redundant if the software designer/ developer has already run a test case

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