What Is Unit Testing, Why Unit Testing Is Required, Its Importance

Hello guys, welcome back to my blog. In this article, I will discuss what is unit testing, why unit testing is required, when and who should perform unit_testing, How to do Unit_testing, etc.

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What Is Unit Testing

Unit tests are typically automated tests written and managed by software developers to assure that a part of a code (identified as the “unit”) reaches its design and functions as expected. In procedural programming, a unit could be a whole module, but it is more generally an original function or procedure.

Unit testing guarantees that all code reaches quality standards before it’s used. This assures a reliable engineering situation wherever quality is predominant. Over the development of the product development life cycle, unit testing preserves time and money, and benefits developers write more reliable code, further efficiently.

• Isolation of a section of code and validating its correctness.
• Testing the behavior of each module.
• Includes breaking a program into pieces and subjecting each piece to a series of tests.

Why To Do Unit Testing?

• To verify the working of code
• Provides documentation of the code
• Easy debugging
• Bugs are seen quicker and fixed at the early stages of the SDLC process
• Improves design and quality of code
• Saves time and money
• Helps in refactoring the code for performance and reusability
• Simplifies the integration
• Code coverage can be measured

When and Who should perform unit testing?

• It is done through the development stage of the project
• Software developers who write the code are responsible for performing Unit_testing

How to do Unit testing?

By following the AAA method:

• Arrange: Initialize the piece of the application to be tested
• Act: Invoke the units and capture the results
• Assert: Observe and retrospect the behavior

Methods of Unit testing:

• Manual
• Automation

Misconceptions and Truths

It takes more time to write code with Unit test cases, and we don’t have time for that.

• Truth: In reality, it would save your development time in the long run.

Unit_testing will find all bugs.

• Truth: It won’t, as the intent of the Unit test is not to find bugs but develop robust software components that will have fewer defects in later stages of SDLC.

100% code coverage means 100% test coverage.

• Truth: This does not guarantee that code is error-free.

I hope this article may help you all a lot. Thank you for reading.

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