Term
| What is Regression Testing? |
|
Definition
Regression Testing is defined as a type of software testing to confirm that a recent program or code change has not adversely affected existing features.
Regression Testing is nothing but a full or partial selection of already executed test cases which are re-executed to ensure existing functionalities work fine.
This testing is done to make sure that new code changes should not have side effects on the existing functionalities. It ensures that the old code still works once the new code changes are done.
Regression Testing is required when there is a
Change in requirements and code is modified according to the requirement
New feature is added to the software
Defect fixing
Performance issue fix |
|
|
Term
| How to do Regression Testing |
|
Definition
Software maintenance is an activity which includes enhancements, error corrections, optimization and deletion of existing features. These modifications may cause the system to work incorrectly. Therefore, Regression Testing becomes necessary. Regression Testing can be carried out using the following techniques:
[image]
Retest All
This is one of the methods for Regression Testing in which all the tests in the existing test bucket or suite should be re-executed. This is very expensive as it requires huge time and resources.
Regression Test Selection
Instead of re-executing the entire test suite, it is better to select part of the test suite to be run
Test cases selected can be categorized as 1) Reusable Test Cases 2) Obsolete Test Cases.
Re-usable Test cases can be used in succeeding regression cycles.
Obsolete Test Cases can't be used in succeeding cycles.
Prioritization of Test Cases
Prioritize the test cases depending on business impact, critical & frequently used functionalities. Selection of test cases based on priority will greatly reduce the regression test suite. |
|
|
Term
| Selecting test cases for regression testing |
|
Definition
It was found from industry data that a good number of the defects reported by customers were due to last minute bug fixes creating side effects and hence selecting the Test Case for regression testing is an art and not that easy. Effective Regression Tests can be done by selecting the following test cases -
Test cases which have frequent defects
Functionalities which are more visible to the users
Test cases which verify core features of the product
Test cases of Functionalities which has undergone 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 Failure test cases |
|
|
Term
|
Definition
If your software undergoes frequent changes, regression testing costs will escalate.
In such cases, Manual execution of test cases increases test execution time as well as costs.
Automation of regression test cases is the smart choice in such cases.
The extent of automation depends on the number of test cases that remain re-usable for successive regression cycles.
Following are the most important tools used for both functional and regression testing in software engineering.
Selenium: This is an open source tool used for automating web applications. Selenium can be used for browser-based regression testing.
Quick Test Professional (QTP): HP Quick Test Professional is automated software designed to automate functional and regression test cases. It uses VBScript language for automation. It is a Data-driven, Keyword based tool.
Rational Functional Tester (RFT): IBM's rational functional tester is a Java tool used to automate the test cases of software applications. This is primarily used for automating regression test cases and it also integrates with Rational Test Manager. |
|
|
Term
| Difference between Re-Testing and Regression Testing |
|
Definition
Retesting means testing the functionality or bug again to ensure the code is fixed. If it is not fixed, Defect needs to be re-opened. If fixed, Defect is closed.
Regression testing means testing your software application when it undergoes a code change to ensure that the new code has not affected other parts of the software.
Also, Check out the complete list of differences over here.
https://www.guru99.com/re-testing-vs-regression-testing.html |
|
|
Term
| Challenges in Regression Testing |
|
Definition
Following are the major testing problems for doing regression testing:
With successive regression runs, test suites become fairly large. Due to time and budget constraints, the entire regression test suite cannot be executed
Minimizing the test suite while achieving maximum Test coverage remains a challenge
Determination of frequency of Regression Tests, i.e., after every modification or every build update or after a bunch of bug fixes, is a challenge. |
|
|
