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What is Regression Testing?Regression Testing is a process to make changes to an older program and also ensure that the old program still working even after making changes to a program. It is a normal part of software development in larger companies, performed by code specialists. Before the release of a new version of a software product, old test cases run against a new version to make sure that old capabilities are still working. To explore other testings, give a read to this blog.
What are the types of Regression Testing Techniques?Below are the types of regression testing techniques:
Retest AllIt is one of the methods of this Testing in which all tests in an existing test bucket or suite re-executed. It is costly as it requires enormous time as well as resources.
Regression Test SelectionInstead of re-executing an entire test suite, it is better to select a part of the test suite to run - Test chosen cases categorized as
- Reusable Test cases
- Obsolete Test cases
Prioritization of Test casesTo prioritize test cases depending on a business impact, critical and frequency used functionalists. The selection of test cases based on priority will significantly reduce the regression test suite.
Continuous Testing is a procedure of testing early, testing regularly, test everywhere, and automate testing on a continuous basis. Source: Continuous Testing in DevOps
How does Regression Testing Work?It is done manually. However, as application development takes time, more and more functionality keeps increasing the scope of regression; therefore this Testing is executed in an automated way. While preparing a test suite for regression, consider the following -
- Automate all the test cases of a test suite.
- Update the regression suite whenever required, like if any new defect which not covered in a test case found, update the test case for that issue in a test suite. Perform Testing for a bug and uncover it next time.
- Execute regression test cases, whenever changes made in code, perform bug fixing, new functionality added, and also an enhancement to existing functionality done.
- Create a test execution report which includes the pass/fails status of executed test cases.
What are the Benefits of Regression Testing?
- Change in requirements and code modified according to the requirement.
- New features added to the software.
- Defect fixing.
- Unit testing.
- Schedule a time to test.
The variety of methods, tools, and practices used to justify that a software application works at many different levels or not. Source- Automation Testing
What are the Best Practises of Regression Testing?
To do this testing, select test cases in the best way. Best Practises are as follows -
- Test cases that have frequent defects.
- Functionalities that are more visible to the users.
- Test cases that verify the deep /core features of a product.
- Test cases for functionalities that undergo more and recent changes.
- All Integration Test cases.
- All complex test cases.
- Boundary Value test cases.
- A sample of successful test cases.
- A sample of failed test cases.
What are the best Regression Testing Tools?
To do it manually leads to a wastage of time and cost. To save time and cost, an automated way of Testing adopted. For this, some tools are mentioned as follows:
Selenium is an open-source tool used for automating web applications. Selenium also used for browser-based testing.
Quick Test Professional
HP QuickTest Professional, is an automated software designed to automate functional and regression test cases. It makes use of Vb Script language for automation.
- AdventNet QEngine
- Regression Tester
- Rational Functional Tester
It is one of the most critical aspects of Testing as it helps to deliver a quality product, providing ensure that change in code, whether it's small or large, should not affect the existing or old functionality. A large number of available automated tools help in the automation of a regression best test case. A tool should have the ability to update a test suite, as the Regression test suite needs to be updated frequently. You can also explore more about Functional Testing in this insight.