Functional testing is the practice of software testing that improves communication between test managers, test engineers, developers, and business analysts. management can observe the progress of the project at any time by checking the functional tests. Finally, it accelerates the development process because the requirements are communicated to ensure faster release. functional tests also encourage subsystem architecture with clearly stated responsibility. A functional testing company follows the testing approach that evaluates all functions of the application to make sure all of the components operate in accordance with the requirements. Every function of the application exhaustively tested to verify that output with every desirable feature. Functional testers test all functions by feeding the input and output verify to check how the system works. Functional tests may also involve testing os API, database, user interface, security, and functionality of the application under test (AUT). functional tests did not include factors such as structure, codes, performance, and environmental factors. The main purpose of functional testing is to ensure the usefulness and accessibility of functions according to specifications required. It also verifies that the application will work properly for all users.
The test team should include functional testing and regression testing into their QA strategy. Functional testing should be an ongoing process during development cycles and through production. It aims to ensure:
Meet the needs of end users
application development goals achieved
Improper identification specifications
Looks interface error
Neither more problems
Meet regulatory requirements and compliance
REGRESSION TESTING
This is a routine part of the software development process and conducted by experts QA. Coders / programmers develop scenarios and test bits of code after they were written. This test is part of the process. So, before releasing a new version of the product, duration of test cases run against the new version to ensure functionality intact old. regression tests can also been partially or completely from the tests that have been executed. It is necessary to perform regression testing for the following reasons:
Changes to the code generated for the changing needs
After defect repair
When performance issues resolved
Major changes to the application
configuration changes
When new features are added to the application
patch fixes
SCOPE OF TESTING
Functional testing has limited scope for specific features. For example, if a team builds a car that has a certain navigation features, testers to test that the feature can locate the car on a map and guide the driver to any desired destination.
Conversely, regression testing no special features. This was done after the bug has been repaired or modified features that have been made, or when new features are added to the existing software application. Let us take the example of the same navigation features as discussed above. If the mechanic still has some problems, regression testing will be performed. Say not turn on navigation features and mechanics to solve the problem, testers to test that it does not only work but also to make sure that everything else in the car are working properly. Regression testing involves end-to-end testing of the product while functional testing refers to testing if a single feature to work.
BASIC PURPOSE
The purpose functional test to test if certain features of the application to work. Meanwhile, regression testing addresses the concerns about the detailed product as any in-app features work well, if certain problems in the application is resolved, etc. The basic aim of the two different types of testing that follows a completely different test.
ACCEPTANCE CRITERIA
Functional test not only tests whether the feature works, but also to test if the feature works in expected ways. If the new features added to the application, not only meant to work, but also work efficiently. It is known as the acceptance criteria of features and functional testing is to test that feature.
Regression testing should consider the admission criteria for some features not just a single feature that has been added, updated or fixed. This happens because when the implementation of the new features or bug is fixed, fixing could affect other components of the application. Thus, the acceptance criteria for features that will no longer be met, and this can only be determined if the tester looks at the acceptance criteria for all of the features caused by the change.
WHY CONSIDER AND FUNCTIONAL REGRESSION TESTING?
QA team uses functional testing and regression testing to ensure the stability of the product. When the cycle of regression testing is done after the changes made in the code and new bugs are identified, the test engineers to learn how to change the code in one of the components of the product impacts in other parts of the code. It also helps engineers as they develop new features because they know that certain parts of the code depends on the other part.
For a team that is still figuring out the features that depend on each other to provide a product which is an important function when bugs are not fixed, but when new features are implemented. The results of the previous test team to help plan future testing cycles and highlight areas that need to be tested when new features are added. regression testing has a broader scope than the functional testing process. However, if the product has gone through different cycles, the team can estimate the impact of the change and then plan to test further.
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