Regression testing is an essential part of software testing that ensures the proper functioning of software applications after making changes to the existing codebase. It is a repetitive testing process that checks whether the changes made to the codebase have not impacted the existing functionalities of the application.
According to a recent survey conducted by Capgemini, the average cost of fixing a defect during production is approximately $15,000.
This emphasizes the importance of regression testing in the software development life cycle. In this blog, we will provide a complete guide for regression testing that includes test cases, tools, and methods.
Test Cases for Regression Testing
Regression testing involves a set of test cases that ensure the proper functioning of the software application after making changes to the existing codebase. The following are some of the test cases that are commonly used in regression testing.
Retest All Test Cases:
In this test case, all the test cases that were executed during the initial testing phase are executed again to ensure that the changes made to the codebase have not impacted the existing functionalities of the application.
Smoke Testing:
Smoke testing is a quick and straightforward test that checks whether the most critical functionalities of the application are working correctly. Smoke testing is performed before running the complete regression test suite.
Test Case Prioritization:
Test case prioritization involves prioritizing the test cases based on their impact on the application. The critical test cases are executed first, followed by the less critical test cases.
Boundary Value Analysis:
Boundary value analysis is a technique that checks whether the application is functioning correctly at the boundaries of input values. For example, if the input field accepts values from 1 to 100, boundary value analysis checks whether the application functions correctly when the input value is 1, 100, or any value in between.
Tools for Regression Testing
Regression testing can be performed manually or using automated testing tools. Automated testing tools are preferred as they are faster, more accurate, and can execute test cases repeatedly without human intervention. The following are some of the automated testing tools that are commonly used in regression testing.
Selenium:
Selenium is an open-source tool that is used for the automated testing of web applications. It supports multiple programming languages such as Java, Python, and C#. Selenium allows testers to record and playback the test cases and supports cross-browser testing.
Appium:
Appium is an open-source tool that is used for the automated testing of mobile applications. It supports Android and iOS platforms and provides a robust framework for testing mobile applications.
JUnit:
JUnit is a testing framework that is used for the automated testing of Java applications. It provides a set of assertions and test fixtures that can be used to write test cases.
TestComplete:
TestComplete is a commercial testing tool that is used for automated testing of desktop, web, and mobile applications. It provides a user-friendly interface for recording and executing test cases and supports multiple programming languages.
Methods for Regression Testing
Regression testing can be performed using different methods depending on the nature of the changes made to the codebase. The following are some of the methods that are commonly used in regression testing.
Full Regression Testing:
Full regression testing involves executing all the test cases in the test suite after making changes to the codebase. Full regression testing ensures that all the functionalities of the application are working correctly after the changes.
Partial Regression Testing:
Partial regression testing involves executing only a subset of the test cases in the test suite after making changes to the codebase. Partial regression testing is performed when the changes made to the codebase are minor, and there is no significant impact on the existing functionalities of the application.
Progressive Regression Testing:
Progressive regression testing involves adding new test cases to the test suite after making changes to the codebase. Progressive regression testing ensures that the new changes made to the codebase have not impacted the existing functionalities of the application.
Selective Regression Testing:
Selective regression testing involves selecting specific test cases from the test suite that are impacted by the changes made to the codebase. Selective regression testing is performed when the changes made to the codebase are significant, and executing all the test cases in the test suite is time-consuming.
Conclusion
Regression testing is an essential part of the software development life cycle that ensures the proper functioning of software applications after making changes to the existing codebase. It helps to identify defects early in the development cycle, reducing the cost of fixing defects during production. At Coding Brains, we understand the importance of regression testing and provide comprehensive testing services to our clients. Our experienced testers use the latest tools and techniques to ensure the quality of software applications. Contact us today to learn more about our services and how we can help you in your software development journey.
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