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Writer's pictureSerena Gray

Understanding Functional Testing and Regression Testing

All testing approaches require Functional & Regression Testing at their centre. While the purpose of Functional Testing is primarily to guarantee usability, availability, and requirement specs analysing, Regression Testing guarantees a new product version still works following the new changes have been made.


What's Functional Testing?


Functional Testing is a software testing approach that evaluates all features/functions of the software to ensure that each element operates in conformance with the requirement specifications. Each functionality or part of the application is tested in-depth to confirm the output/result supplied by every application work is as desired.


Works are analysed by feeding input and verifying the output to assess what the machine does. The inner structure, code, performance, and environmental variables are usually not considered in Testing.


The purpose of operational Testing is mainly to guarantee usability, availability, and requirement specs analysing. It verifies that a product or application will function properly and optimally for your users.


There are lots of testing methods.


All testing strategies need Functional Testing at their core. Functional verification should be a continuous process during the growth cycle and through production.


End-user requirements are fulfilled

Application development aims are fulfilled

Regulatory and compliance requirements have been fulfilled

Identifies incorrect specification

Finds initialisation mistakes

Looks for interface errors

Additionally finds grammatical mistakes


What's Regression Testing?


Regression Testing is your approach in software testing which guarantees that the programming still works after the new changes have been made to the code. It is a regular part of the software development lifecycle and is often completed by code testing experts.


Coders develop test scenarios and exercises which test new pieces of code once they are written. These tests are part of this test bucket'. Before the fresh product version release, old test cases are run against the new variant to guarantee the old functionality is undamaged. The reason for this is that occasionally, including new code may introduce errors into the code.


Regression Testing frequently means partial or full selection of tests that have been already implemented, to operate again.


Regression Testing is necessary when

  • The code is altered due to changing requirements

  • New attributes are added to applications

  • After defect adjusting

  • Performance difficulty mend

  • Patch fix

  • Major changes

  • Configuration changes


Optimising Testing for Agile


Functional and regression testing may cause distress and challenges for Agile teams. Often, teams spend the entire dash on regression. The higher efforts and time add up to the prices. How can you produce an effective regression plan for agile teams?


  • Prioritise test cases with critical functionality and core characteristics and the ones that pose bigger dangers of collapse

  • Choose test cases that have the highest code coverage or people that had the maximum amount of flaws in the past.

  • Produce a test-first culture.

  • Use Continuous Integration server to conduct unit and integration tests for every construct.

  • Always ensure that your final test off comprises regression testing and all application changes have passed on regression tests.

  • They need to be repeated often and are relatively stable.


It is among the most essential features of testing because it can help to guarantee the general quality at different phases in the software testing life cycle.

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