Black Box vs White Box Testing
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Black Box vs White Box Testing
Black Box Testing and White Box Testing are two fundamental software testing methods with different approaches.
Black Box Testing focuses on testing the software’s functionality without knowing its internal code or structure. Testers provide input and check the output, ensuring the system behaves as expected. It is used to validate user interfaces, data handling, and overall behavior. Test cases are based on requirements and specifications. It is typically done by testers or QA teams. Common techniques include equivalence partitioning, boundary value analysis, and decision table testing.
White Box Testing (also known as glass box or structural testing) involves examining the internal logic and code structure of the application. Testers must understand the code and test how it processes inputs internally. It is often done by developers to check loops, conditions, paths, and logic flow. Techniques include statement coverage, branch coverage, and path testing.
Key differences:
Black Box tests what the system does; White Box tests how it does it.
Black Box is focused on functionality; White Box is focused on internal logic.
Black Box doesn’t require programming knowledge; White Box does.
Both methods are important: Black Box ensures the application works as expected for users, while White Box ensures the code is robust and error-free internally.
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