Principles Of Software Testing

Principles of Software Testing 

The process of putting a piece of software or an application through its paces so that flaws or errors can be discovered is known as software testing. In order to successfully test an application or piece of software, we need to adhere to a set of guiding principles. Not only will this assist ensure that our final product is free of errors, but it will also make it easier for software testers to do their jobs. The seven fundamental tenets of software testing are going to be covered in depth here, in the following section of the article.

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Key Principles of Software Testing 

The testing of software is problematic since it is exceedingly tough and needs a significant amount of resources. Therefore, you need to improve the testing procedure so that you can bring out products of the highest possible quality.

You can accomplish this goal with the assistance of the seven principles of software testing. These software testing principles explain how testing engineers and software testers should write code so that it is error-free, easy to understand, and straightforward to maintain.

The International Software Testing Qualifications Board (ISTQB) lists the following items as the seven fundamental principles of software testing:

  • Testing shows the presence of defects
  • Exhaustive Testing is not possible
  • Early Testing
  • Defect Clustering
  • Pesticide Paradox
  • Testing is context-dependent
  • Absence of errors fallacy

Testing shows the presence of defects

The application is going to be tested by the test engineer to ensure that there are no bugs or other faults in the program. Only via testing will we be able to determine whether or not the application or software contains any faults. Because the complete test should be accountable to the customer demand, which means uncovering any flaws that can cause the product disqualified and tend not to fulfill the client’s needs. The major objective of doing testing is to detect the number of unidentified bugs with the aid of different methods and testing techniques. Given that the testing should be done with the understanding that the entire procedure should be done in order to satisfy the customer demand.

It is possible to reduce the number of bugs in any application by performing testing on it; however, this does not guarantee that the application is free of flaws. Sometimes, the software will give the impression that it is bug-free even when being subjected to a number of different types of testing. However, in the event that the end-user experiences defects that were not discovered during the testing process, this may occur when the application is being deployed on the production server. Learn the principles of software testing by joining the best software testing training in Chennai.

Exhaustive Testing is not possible

During the actual testing process, there are times when it appears to be very difficult to test all of the modules and the functionalities of those modules with both effective and ineffective combinations of the data inputs.

As a result, rather than carrying out thorough testing because it requires unending resolve and the majority of the effort put in is fruitless. In order for us to be able to complete this kind of variations according to the relevance of the modules because the product timeframes would not be allowed us to execute this kind of testing scenario, we need to make sure that we can.

Early Testing

Like if we locate the defects at an early stage in order, they will be addressed in the early phase itself, which may charge us very less when compared to those that are discovered in the latter phase of the testing procedure, early testing indicates that all of the testing activities should begin in the initial stages of the software development life cycle’s requirement analysis stage to detect the defects.

We will need the requirement specification documents in order to carry out testing; hence, if the requirements are described erroneously, this may be corrected directly rather than at a later point, which might be the development phase of the project. All you need to know about software testing is covered in detail through hands-on training under the guidance of true professionals at SLA, the best software training institute in Chennai.

Defect clustering

Through the use of defect clustering, we determined that during the course of the testing process, we are able to identify the quantities of problems that are linked to a limited number of modules. This is due to a variety of factors, such as the modules possibly being difficult to understand, the coding aspect possibly be challenging, and so on.

These kinds of software or application will adhere to the Pareto Principle, which claims that we may determine that about eighty percent of the complexity is present in twenty percent of the modules. The Pareto Principle is followed by these sorts of software or application. We are able to locate the modules that are unsure with the assistance of this, but this method is not without its challenges since if the same tests are performed on a consistent basis, those tests will not be able to uncover any newly introduced flaws.

Pesticide paradox

This theory said that if we continue to run the same set of test cases over and over again after a predetermined amount of time, then tests of this kind will not be able to detect any new flaws that may have been introduced into the application or software. It is of the utmost importance to regularly go back over all of the test cases in order to overcome these pesticide contradictions. And the new and various tests that need to be written for the implementation of multiple portions of the application or the program are required in order for us to uncover more problems in the system. Learn a Software Testing course in Chennai at SLA and secure a promising job in an IT firm through their dedicated placement assistance. 

Testing is a context-dependent principle that acknowledges that we have multiple fields that exist on the market, such as e-commerce websites, commercial websites, and so on. Since every application has its own requirements, features, and functionality, there is a specific approach to testing both the commercial site and the e-commerce websites. This method is known as A/B testing. In order to validate this kind of application, we will put it through its paces using a wide range of tests, in addition to a variety of strategies, procedures, and methodologies. As a result, the testing is dependent on the environment in which the application is being run.

Absence of errors fallacy

The program will be considered to be 99 percent free of defects once it has undergone exhaustive testing and there has been no evidence of any flaws being present in the application prior to its release. But there is a chance that when the application is tested alongside the incorrect requirements, identified the flaws, and fixed in a given period of time would not support as testing is done on the improper specification, which does not pertain to the project plan. This is because the testing was done on the wrong specification. The lack of mistake fallacy states that if an application is impracticable and unable to fulfill the requirements and needs of the customer, locating and correcting any problems that may exist in the software will not be of any assistance.\


You may improve the quality of your testing approach as a whole and increase your concentration and efficiency if you follow these seven principles of software testing. When one principle is used, it’s possible that the others will fall into place naturally. As an example, testing at the specifications level at the beginning of the software lifecycle can help reduce the risk of the absence-of-errors fallacy by increasing confidence that the final product will satisfy the needs of its intended audience.