TestNG is a next-generation automation testing framework that draws on a JUnit foundation. The framework is part of the TDD or test driven development process.
That begs the question, what is JUnit?
It is another famous framework that developers use for unit testing. Unit testing is where the developers test blocks or units of code before letting automated testers handle more testing. Integrated development environments of types support JUnit.
Remember that a critical difference here is that developers use JUnit to conduct unit testing while test engineers use TestNG to conduct holistic testing.
JUnit annotations include @test, @beforeclass,@afterclass, and more.
Why do automation testers use TestNG?
Skilled testers use it to simplify their lives and improve their efficiency. The framework helps to pave the way for more frameworks. Testing professionals prefer this framework over JUnit and NUnit because it packs a more powerful punch.
We’ll look at a few of these functionalities below.
TestNG Functionalities and Advantages
Default reporting is a primary functionality that makes a difference in the life of the test engineer. Test cases with TestNG will come with reports, which are not present by default with Selenium WebDriver.
Flexibility is another core component that is appealing to TestNG users as it allows for simple test configurations. This is important as a test engineer must be more flexible and adaptable to run a variety of tests. It will also support XML files.
Data-Driven Testing and Parameters – TestNG comes with the ability to work with 2D arrays and excel sheets. One component, data provider, is one of these annotations that helps to distribute the data. For instance, data provider annotation will fetch the excel data and input it into your test case.
Simple TestSuite Execution is another appealing part of TestNG. Remember that a test suite is a combination of multiple test cases. The execution of several test cases at once is necessary for the software development cycle.
TestNG works well with other tools and plugins such as Eclipse and Maven.
An annotation is a piece of code that controls your methods and test execution. There are a variety of annotations present in TestNG which conduct different actions. Annotations always have an @ symbol before the command. An example is @beforemethod. Another example is @aftermethod.
This is a brief overview of what TestNG is and why developers and testers use it in their software development cycle activities.
Let’s look at how to install TestNG.
Step 1. Install the Eclipse IDE.
Step 2. Inside Eclipse, go to help, browse, and find install new software, click.
Step 3. Click on Add, input TestNG for Name, and input this link for location.
Step 4. Wait.
Step 5. Check TestNG once it appears, click next, next, accept terms, click install anyway. Done.
Go to the new project, other. Click on Maven Project, next, next, input group name and artifact ID.
I always remember to go to the Maven Repository online and search for selenium, and input that code in the POM XML file under dependency. Then do the same for Test NG in the Maven Repo online. Click on the latest version for TestNG, copy the code, and input it in your dependency in the POM XML file.
Finally, save it.