White Box Testing
White Box Testing is a software testing technique that tests the internal structure, design, and coding of an application. It ensures the logic and flow of the code are working as intended.
What is White Box Testing?
White Box Testing, also known as Clear Box Testing or Glass Box Testing, involves testing the internal logic of the code. Testers need knowledge of programming to create test cases for paths, conditions, and loops.
Objectives of White Box Testing
- Verify internal security mechanisms
- Test individual paths in the code
- Validate input/output flow
- Ensure proper functioning of loops and conditions
Advantages
- Helps optimize the code by finding hidden errors
- Ensures maximum code coverage
- Useful for security testing
- Improves code quality and logic
Limitations
- Requires knowledge of programming and coding
- Time-consuming for large applications
- Not feasible for testing GUI or overall usability
White Box Testing Process
- Understand the source code and internal logic
- Create test cases for different code paths
- Execute tests focusing on loops, conditions, and branches
- Record and analyze results
- Fix code issues and re-test
Example
Testing a login function by checking different code paths such as correct password, incorrect password, and empty input.
Best Practices
- Ensure maximum path coverage during testing
- Combine with Black Box Testing for better results
- Automate repetitive code-based test cases
- Use tools for code analysis and coverage measurement