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Techniques Within Unit Testing

#1) White box testing:

 

In white-box testing, the tester knows the internal structure of the software including the code and can test it against the design and requirements. Hence white box testing is also known as transparent testing.

 

white box testing

 

#2) Black box testing:

 

In black-box testing, the tester does not know the internal structures either the code of the software.

 

black box testing

 

#3) Grey box testing:

 

This is also referred to as a semi-transparent technique testing which means, the testers are only partially aware of the internal structure, functions, and designs along with the requirements. Debugging is done by actual input from the front-end to get exact data in the back-end. The grey box is therefore considered as a combination of black box and white box testing techniques.

 

Grey box testing

 

Grey box testing covers the following types of testing:

 

Matrix Testing.

Pattern Testing.

Orthogonal Pattern Testing.

Regression Testing.

Benefits Of Unit Testing

The process becomes agile: For adding new functions or features to the existing software we need to make changes to the old code. But changing things to the already tested code can be risky as well as costly.

Code quality improves: The quality of code is automatically improved when unit testing is done. The bugs identified during this testing are fixed before it is sent for the integration testing phase. Result in robust design and development as developers write test cases by understanding the specifications first.

Detects bugs early: As developers run unit tests, they detect bugs early in the software development life cycle and resolves them. This includes flaws or missing parts in the specification as well as bugs in the programmer’s implementation.

Easier changes and simplified integrations: Doing unit testing makes it easy for the developer to restructure the code, make changes, and maintain the code. It also makes testing the code after integration much easier. Fixing an issue in Unit Testing can fix many other issues occurring in later development and testing stages

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Documentation availability: Developers who are looking into the functionality at a later stage can refer to the unit testing documentation and can easily find the unit test interface and correct or work fast and easily.

Easy debugging process: It helps in simplifying the debugging process. If the test fails at any stage the code needs to be debugged or else the process can be continued without any obstacles.

Lower cost: When bugs are detected and resolved during unit testing, cost and development time is reduced. Without this testing, if the same bugs are detected at a later stage after the code integration, it becomes more difficult to trace and resolve, making it more costly and increasing development time.

Code completeness can be demonstrated using unit tests: This is more useful in the agile process. Testers don't get the functional builds to test until integration is completed. Code completion cannot be justified by showing that you have written and checked in the code. But running Unit tests can demonstrate code completeness.

Saves development time: Code completion may take more time but due to fewer bugs in the System and Acceptance testing, overall development time can be saved.

Code coverage can be measured