Software Testing Principles

In this tutorial you will learn about the Software Testing Principles and its application with practical example.

Software Testing Principles

The software performs various functions depending on its features. Every feature helps you attain the specific results that you need. But what about the bugs and errors in the software? How do you get to know about them? Software testing is a comprehensive process that helps execute the program and find the errors in it. To ensure that the software works at its best, it must be error and bug-free. Precise testing can help eliminate all the errors easily.

Table Of Contents

Although, software testing comes with a set of principles that are followed at any cost! But what are the basic principles of software, Explain? And this is what the underlying guide focuses on! All in all, there are seven basic principles of software and software testing which can be listed and explained below.

Exhaustive Testing is Impossible

To your wonder, indeed, exhaustive testing is not possible. Besides, it’s essential to understand the fact that you need optimized test results with the risk assessment of the application. To determine these risks, you need to implement the tests according to the operating systems you use. Deepening on that you need to figure out what testing is best for your system.

Defect Clustering

It states that a small module can contain the maximum number of detected defects. More than 80% of the problems and bugs are found in 20% of the modules. To detect such modules, you need to be thorough with all the aspects and modules of software testing. Besides, it comes with a drawback as well. Repetition of the same tests may result in no new bug findings.

Pesticide Paradox

As in farms if you sprinkle the same pesticides, the insects will eventually develop resistance against them thereby resulting in the ineffectiveness of the pesticides. Similar is the case with software testing. General principles of the testing state that if the same set of repetitive tests is conducted, the tests will fail to discover new defects. And thus testing needs to be revised and reviewed regularly.

Testing implies Defects

The testing principles in software testing state that testing is all about the presence of defects. It never states anything about the absence of defects. Instead, even after testing, it never gives proof of 100% correctness. It means there is still scope or errors which are not unleashed yet. Even, if you develop 99% bug-free software, there may be defects in the form of client requirements and thus testing shows the presence of defects.

The fallacy of Absence of Error

Software may be 99% bug-free but still be of no use. Such cases arise when the system is tested for the wrong requirements. Software testing principles and practices are not all about finding the defects but also checking that they fulfill all the business and client needs. And this finding defects and fulfilling user requirements both are essential parts of software testing.

Early testing

In the software development life cycle, testing should be done as early as possible. It helps to detect the defects in the initial phase and avoid any inconvenience in the final phases of the development. As soon as the requirements are defined, testing should be commenced.

Testing is context-dependent

Testing for each site or software will be different as the needs and requirements of each are different as well. Besides, the prospects of bugs and defects are also different for every single website. All the developed software’s are not the same and so does their testing. Using different methods, approaches, techniques, etc. can alter the types of testing.


These basic principles of software testing give it a new direction. It helps stay focused and precise when testing particular software keeping all the essential information regarding the same in mind. All these above-mentioned general principles of testing help create an effective test strategy and create error-catching test cases.

In this tutorial we have learn about the Software Testing Principles and its application with practical example. I hope you will like this tutorial.