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A Detailed Comparison Unit Testing vs. Functional Testing

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In this tutorial we are going to see the differences between Unit Testing and Functional Testing. The main goal of any testing is to deliver a quality product that find the right job balance between unit testing and functional testing.

The goal of software or application testing is to build a quality product. Software testing types come with excellent software development importance. Functional testing vs unit testing is the foundation of the testing process. Here, we have explained the main difference between both is:

  • The developer in the development cycle performs the best unit testing.
  • The tester performs the functional testing well during the level of system testing.

Understanding Unit Testing vs. Functional Testing

Unit Testing

Unit testing is a practice adopted by most organizations. It primarily helps in reducing the risk of bugs. To test the functional part of an application, we use a set of codes that pass through Automated testing.

The developers make their own choice of doing a manual unit test or an automated unit test. It follows step-by-step document testing that helps developers to isolate the function. The test makes it more rigorous.

It follows white-box solutions for automated testing such like:

  1. Junit: It’s used as java programming and is available for free.
  2. Nunit: It popular framework is used for .Net languages and is an open-source tool.
  3. Jmockit: It’s widely used unit testing which supports recording and verification syntax.
  4. PHPUnit: It’s a tool for a PHP programmer. It’s a pre-defined simulation that helps to create a system structure for testing.

Advantages of Unit Testing

  • It allows developers to refine code and make sure that the module works efficiently.
  • It enables testing parts of the project without the dependency of others for completion.

Functional Testing

While testing the system against the functional requirements, it’s termed functional testing. The processing steps test with results of processing matters through the input-output process. Without making any environmental expectations, it simulates the actual system functionality.

The tester tests the black box by using technique and helping in the test results to plan correctly. There are different software testing types available. One of them is functional testing and methods used to execute them. It includes integration testing, smoke testing, user acceptance testing, sanity test, and regression testing.

Advantages of Functional Testing

  • It takes user perspective to the software development team to create test scenarios representing real-world used scenarios.
  • Helps to expand actual system usage by enhancing the quality of the software product.
  • It allows the team to meet the obligation of the user and client.

Comparison Between Unit Testing vs. Functional Testing


Wrap Up

In current times, customers ask developers and SI companies to develop software of the highest quality. It compels the companies to incorporate, unlike testing stages as a part of the development process.

Here the unit testing is the key to achieve bug-free codes used for growing in the competitive market. The developer spends extra hours correcting the errors. The software testing types plays a vital role in ensuring code quality and helps in coding in line with design document. The functional testing identifies the defects against a business document by making it a perfect software product with customer expectations.

The main goal of any testing is to deliver a quality product that find the right job balance between unit testing and functional testing.