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Black Box Testing

Updated 22 Jul 2026

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def
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  a testing method in which the tester does not know the internal structure, layout, or design of the product being tested
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  also known as behavioral testing or specification-based testing
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purpose
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  verify the system produces expected outputs for given inputs
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  test based on the specification of requirements
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approach
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  select a function and give input values to examine its functionality
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  check whether the function produces expected output
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steps
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  1. base testing on requirements specification
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  1. create positive (valid input) and negative (invalid input) test scenarios
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  1. develop test cases using appropriate techniques
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  1. execute all test cases
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  1. compare expected vs actual output
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  1. fix any flaws found and retest
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applicable at
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test case design techniques
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related

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