Some teams ultimately prefer to create all-pairs value sets on their own. Comparisons of this nature are often undertaken in a post hoc manner, that is, when the omnibus null hypothesis for ANOVA is rejected, further analysis between the pairs of means will indicate where group differences lie. It is essential to understand that most common bugs that can be found in software are usually triggered by either a single input parameter or an interaction between pairs of parameters. Finding bugs involving interactions between three or more parameters is hard and costly. Combinations generated for pairwise testing example can be used to verify your product for cross browser testing by making use of LambdaTest.

definition of pairwise testing

The type of integration testing aimed at a pair of components, working together, respectively, the challenges. QATestLab Training Center — is a special educational project, powered by QATestLab company to develop and popularize the job of the software tester in Ukraine. Our specialists have developed a range of the educational programs the purpose of which is to provide our students with the large anount of theoretical knowledge and practical skills to work in IT sphere. Therefore, the Pairwise technique is a particular method of optimizing the design of test cases. It is possible to indicate invalid variable values during the creation of combinations for negative tests.

What Is Pairwise Testing And How To Use It For Cost-Effective QA

Pairwise testing is a combinatorial method of software testing that, for each pair of input parameters to a system , tests all possible discrete combinations of those parameters. Next, consider where the pairwise testing technique fits in the software development lifecycle. Each time functionality changes, the new version of the feature can invalidate a testing value set. Evaluate if pairwise testing should occur during functional testing or regression testing.

He currently works as the ‘Lead Developer Evangelist’ and ‘Senior Manager ’ at LambdaTest. As mentioned earlier, software products have to be tested for ‘cross-browser + cross-platform + cross-device’ compatibility before they are released to the end customers. There could be a possibility that your target customers might be using ‘old version of Chrome browser on Windows 7’ or ‘latest version of Firefox on Ubuntu’, etc.

Selenium Testing

If we talk of combining something, we must at least have two things to combine. So, as a kind of combinatorial testing, the lowest thoroughness is 2. Once you have the generated test cases, you can also automate them via some black box testing tool like Testsigma. With Testsigma, a no-code test automation tool, you can automate your front-end tests for web, mobile, and desktop from the same place 5x faster. The test case creation and maintenance is as easy as writing sentences in simple English. Testsigma is also available as an opensource and free-forever version.

definition of pairwise testing

By using carefully chosen test vectors and parallelizing tests, this method is capable of significant resource saving and speeding up the whole process. The ROI of Pairwise testing may be less in case the input values that are used for testing are incorrect. Though boundary value testing is important to achieve maximum test coverage, it should not happen that testing is performed with incorrect input values. Take the case of testing your web application/website on different devices.

Pairwise Testing | What It Is, When & How to Perform?

Some things are easier said than done and the same can be said about ‘Website Testing’. For the development team, the criteria could be LOC pushed to the project/product repository; for the test team, the criteria could be number of tests executed/bugs raised/number of tests developed. Probabilistic models also give rise to stochastic variants of transitivity, all of which can be verified to satisfy (non-stochastic) transitivity within the bounds of errors of estimates of scale locations of entities. Thus, decisions need not be deterministically transitive in order to apply probabilistic models. However, transitivity will generally hold for a large number of comparisons if models such as the BTL can be effectively applied. To generate a subset of input/output values to create an effective test coverage.

definition of pairwise testing

By testing all the combinations of two numbers, you can be sure that the application is working correctly and will not fail when given different numbers. Once you have identified the necessary combinations, you can make use of cloud based cross browser testing provided by LambdaTest. Using LambdaTest Capabilities Generator, you can use automation test framework like Selenium with languages like C#, Python, Java, Ruby, PHP, Javascript. Before we had a look at a ‘cross browser testing’ use case; to start with, let us have a look at a rather simpler pairwise testing example. Here, I will be portraying a pairwise testing tutorial, I will be doing so by demonstrating a pairwise testing example.


Using pairwise techniques we can design cases for better coverage. Now let’s look into how to perform pairwise testing, step by step with an example of a bookstore. For context, this bookstore definition of pairwise testing buys and sells books both online and in-store. Pairwise testing is a kind of combinatorial testing because it includes all combinations of some number of values in at least one of the tests.

definition of pairwise testing

If so, you can reject the null hypothesis and conclude that the two groups are in fact different. A t test is a statistical test that is used to compare the means of two groups. It is often used in hypothesis testing to determine whether a process or treatment actually has an effect on the population of interest, or whether two groups are different from one another.


A thoroughness of 2, i.e. 2-wise or pairwise, has a very good tradeoff between thoroughness and effort. A thoroughness of 3 is a good for more important rounds of testing, for example, for later stages of development. Pairwise Testing also known as All-pairs testing is a testing approach taken for testing the software using combinatorial method.

For example, it is possible to indicate that one of the variables will take the value only when some other variables take specific values. For the set of above mentioned parameters, PICT creates only 60 of them. The difference is not significant, but it will be with the increasing number of testing variables or their values. Choosing the Right Statistical Test | Types & Examples Your choice of statistical test depends on the types of variables you’re dealing with and whether your data meets certain assumptions. A paired t-test is used to compare a single population before and after some experimental intervention or at two different points in time .

Load/Performance Testing Your API Using Postman

If the groups come from two different populations (e.g., two different species, or people from two separate cities), perform a two-sample t test (a.k.a. independent t test). End-to-End Test Automation Scripts are nothing to do with code and shall be in a scripting language. As a result, the Result.txt file will be filled with shortened testing results. Some textbooks introduce the Tukey test only as a follow-up to an analysis of variance. There is no logical or statistical reason why you should not use the Tukey test even if you do not compute an ANOVA .

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