Principles of Software Testing

Principles of Software Testing

One method for raising the caliber of software applications is software testing. The primary goal of software testing is to release a flawless programme into the live environment. Software testers adhere to a set of principles that form the basis of their work.

• Exhaustive Testing is not possible : — Comprehensive testing of an application without any prior preparation of test cases and scenarios results in increased time consumption and can be a significant cause of bug leaks. The most effective way to test the programme is to integrate several modules and use a mix of positive and negative test scenarios. A quality engineer had less opportunity during thorough testing to examine the application’s predicted bug-free behavior.
• Early Testing : — The best way to preserve software quality from the beginning of development is to test the application as soon as requirements are being analyzed. Early testing helps to avoid causing any significant problems or deployment roadblocks. It results in timely delivery of high-quality software. Early involvement of QA engineers helps them comprehend the functional requirements of the application and produces high-quality testing results.

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• Defect Clustering :- It states that the majority of software defects are discovered in a limited number of modules during the testing process. The main cause of this could be that some modules are large or complex, require the integration of another difficult module, or both. Therefore, it will not be possible to identify defects using the same test cases for these modules. These kinds of software programmes adhere to the Pareto Principle, which states that 20% of the modules contain 80% of the defects.
• Pesticide Paradox : — Having numerous visions for a module is the core focus of this idea. We can conclude that it is not an appropriate technique to use the same test cases from the beginning of deployment to the end. As newer versions of the programme are launched, they begin to affect earlier versions. For this reason, a QA engineer should test various scenarios using various data sets and guarantee flawless communication across modules.
• Testing is context-dependent : — As a result, testing applications with different objectives requires different approaches and techniques. For instance, testing an e-commerce website is completely different from testing a banking website. This indicates that we have multiple applications, each with different functionality and different business objectives.

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• Absence of error is a fallacy :- An programme can be considered 99% bug-free if it has undergone extensive testing and has been fixed by the developers, even if no defects are found. This implies that bug fixes won’t aid in error removal if the work is carried out in accordance with the incorrect specification.
• Testing shows the presence of defects:- To ensure that the programme is free of errors and bugs, test engineers test it. Even if the flaws are not detected in a pleasant application flow, there is always a chance that retesting the programme in different scenarios will uncover new bugs if it has been tested and the developers have addressed the ones they found. To ensure that your application is 99 percent bug-free, you must test it and try to eliminate as many issues as you can.