Regression Testing - Types of Testing

What is Regression Testing?

Regression Testing is a type of software testing that verifies the application's functionality after the code changes. It is performed to ensure that the new code changes do not affect the existing functionality of the application. It is also a black-box testing technique that is performed by the testing team in the software industry.

Objectives of Regression Testing

Regression Testing has the following objectives:

Verify - It verifies the application's functionality after the code changes.
Identify - It identifies the defects introduced due to the code changes.
Prevent - It prevents the defects from reaching the production environment.
Improve - It improves the quality of the application by verifying the code changes.
Reduce - It reduces the risk of defects in the production environment.

Example of Regression Testing

An example of Regression Testing is an e-commerce application that verifies the application's performance under different load conditions. The testing team needs to verify the application's performance after the code changes to ensure that the new code changes do not affect the existing functionality of the application. The testing team needs to execute the test cases and verify the results to ensure that the application's performance is not affected by the code changes.

Types of Regression Testing

There are different types of Regression Testing. Some of them are:

Unit Regression Testing - It verifies the unit of the application after the code changes.
Integration Regression Testing - It verifies the integration of the application after the code changes.
System Regression Testing - It verifies the system of the application after the code changes.
User Acceptance Regression Testing - It verifies the user acceptance of the application after the code changes.
Smoke Regression Testing - It verifies the smoke of the application after the code changes.
Sanity Regression Testing - It verifies the sanity of the application after the code changes.
Functional Regression Testing - It verifies the functionality of the application after the code changes.
Non-Functional Regression Testing - It verifies the non-functional requirements of the application after the code changes.
Performance Regression Testing - It verifies the performance of the application after the code changes.
Usability Regression Testing - It verifies the usability of the application after the code changes.
Security Regression Testing - It verifies the security of the application after the code changes.
Compatibility Regression Testing - It verifies the compatibility of the application after the code changes.
Reliability Regression Testing - It verifies the reliability of the application after the code changes.
Scalability Regression Testing - It verifies the scalability of the application after the code changes.

Tools for Regression Testing

The tools used for Regression Testing are similar to the tools used for functional testing and non-functional testing.

Challenges in Regression Testing

The challenges in Regression Testing are similar to the challenges in functional testing and non-functional testing.

Advantages of Regression Testing

There are some advantages of Regression Testing. They are:

Quality - It improves the quality of the application by verifying the code changes.
Requirements Verification - It verifies the requirements of the application after the code changes.
User-Friendly - It makes the application more user-friendly by verifying the code changes.
Defect Detection - It detects the defects in the application after the code changes.

Disadvantages of Regression Testing

There are some disadvantages of Regression Testing. They are:

Time-Consuming - It is time-consuming to execute the test cases after the code changes.
Complex - It is complex to verify the application's functionality after the code changes.
Costly - It is costly to execute the test cases after the code changes.
Resource-Intensive - It requires more resources to execute the test cases after the code changes.
Defect Tracking - It is difficult to track the defects in the application after the code changes.

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