White Box Testing & Black Box Testing
Definitions , Techniques etc
This article will present you with a complete idea about White Box testing and Black Box Testing
We will learn below topics in this article
White Box Testing
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- White box testing is testing where we use the info available from the code of the component to generate tests.
- Testing the software in which the tester has knowledge about the internal structure or the code or the program of the software.
- It is mostly done by software developers.
- Knowledge of implementation and internal structure is required.
- Debugging will always be white-box testing
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Types of White Box Testing:
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- Statement Coverage
- Decision Coverage
- Branch Coverage
- Condition Coverage
- Path Coverage
- Control flow testing
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Advantages of White Box Testing
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- Testing is more thorough as all code paths are usually covered.
- White box tests cases can be easily automated.
- It can start at an earlier stage of SDLC as it doesn’t require any interface as in case of black box testing.
- It results in the optimisation of code removing error and helps in removing extra lines of code.
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Black box testing
- Black Box Testing is testing technique having no knowledge of the internal functionality/structure of the system
- Black box testing is also called Behavioral, Functional, Opaque-Box, Closed-Box etc
- focuses on testing the function of the program or application against its specifications
- Determines whether combinations of inputs and operations produce expected results
Black box testing Techniques
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- Equivalence portioning.
- Boundary Value Analysis
- Error Guessing
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Advantages of Black-Box Testing
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- More effective on larger units of code than glass box testing
- Tester needs no knowledge of implementation, including specific programming languages
- Tester and programmer are independent of each other
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