Let me first start by explaining the differences. Integration – Is a technique when the components of the same system interact with each other. So in testing world, when we do Integration testing, we are actually testing the behavior of the 2 or more, lowest levels of components of the same system. During non-functional testing, the emphasis is on ensuring the quality of the non-functional components of the software. Here, the testers test all the aspects that are not examined in functional testing. Here is a quick comparison highlighting the major differences between functional and non-functional testing methods. Let us use the same example for Functional Testing to compare the difference between Unit tests vs functional tests. Below is the sample test case for logging in to the e-commerce application. Since it is a Unit Test case, we can take the individual elements like the ‘Username’ and ‘Password’ text boxes and the ‘Submit’ button. Inter-Systems Testing: This method is an interface between two or more application systems. Exploratory Testing: Exploratory testing is similar to ad-hoc testing, and is performed to explore the software features. Volume Testing: This testing is done when huge amount of data is processed through the application. Test automation and continuous integration can be used to streamline the testing process and ensure that functional and regression testing are performed consistently and efficiently. While continuous integration can be used to make sure that software updates do not disrupt existing functionality, test automation tools can be used to execute Integration testing aims to ensure those pieces of your application work well together. Thorough integration testing will have your application running like a well oiled machine in production. Functional Testing. Functional testing is intended to test the software functionality broadly against the business requirements. Did you know Unit testing, functional testing, and integration testing are all important types of software testing, but they differ in terms of their scope and focus. 1️⃣ Unit Testing: Unit Yet another clear difference between these two functional tests is that integration testing is black-box testing and unit testing is white-box testing. In the case of unit testing, the developers know the internal design of the application, while testers don’t need to see the code in integration tests. Functional tests are performed after the development stage is over in the SDLC. A functional test is executed by the QA team such as a QA tester or QA engineer. There are a few types of functional tests that testing teams are using regularly such as integration testing, smoke testing, regression testing, sanity testing, and so on. Comparing functional and non-functional tests. Functional tests confirm that the code is doing the right things, while non-functional tests validate that the code is doing things the right way. Both types contain methodologies for validating front-end and back-end elements and behaviors. There is some overlap between the two categories in the KRe9U.