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Testng Tutorial – Anatomy, Parallel Execution, and Method Grouping


In this testng tutorial, you’ll learn about annotations, parallel execution, and Method grouping. You’ll also learn about the differences between JUnit and TestNG. By the end of the tutorial, you’ll be able to write your testNG tests. But before you do that, you’ll need to understand the basics of software development and testing processes.


In the TestNG tutorial, we learned that using annotations is essential for writing effective tests. Annotations are useful when you want to check the title of a target page. The depend groups attribute can help you with that. It acts as a container for dependencies. In addition, it defines the test method.

Annotations can be used for many different tasks. For example, you can use them to start Selenium drivers and perform generic functions. They can also clean up processes after tests are run. In the testng tutorial, we learn about some of the most common types of annotations and how to use them.

Using TestNG annotations can help you create automated tests that can be run for multiple purposes. These annotations can check several different factors such as a database connection or login code. They can also take screenshots of every test method. They run before and after every test method in a class. Annotations can also be used to test the browser’s properties or initialize the driver.

Method grouping

Method grouping is a useful feature that lets you group multiple test methods. You can specify that certain methods belong to certain groups, and you can also ask the testing framework to run specific groups only. This will reduce maintenance costs, as you will not have to recompile your code after making changes to certain groups.

You can use method grouping to group tests that depend on each other. For example, you can group methods based on class. Factory methods are grouped in a group. These methods can take parameters and return them. However, they do not need to have TestNG annotations. The grouping feature makes the development process much easier.

In addition to separating the tests, Method grouping in TestNG also supports creating groups of tests. These groups are then run sequentially. For example, if a method belongs to G1, the test will be executed in the same order as all other methods. In addition, it can be used to exclude certain methods from running.

Parallel execution

Parallel execution in TestNG can be done in two different ways: through the parallel attribute, or using TestNG Data Providers. The parallel attribute defines how many parallel threads will run each test method. Once the first method has been executed, the parallel threads will take up the next method in the queue. This can help your tests run faster.

When multiple test methods are specified, TestNG will attempt to start them all simultaneously. It’s important to check the parameter types before using the parallel execution feature. It also helps to remember that test method that contains large parameter sets are not parallelized. To run a test in parallel, you need to specify the order in which the methods are to run.

Using the service loader, you’ll need a jar file with the test methods you’d like to run. The jar file should be in your classpath. It’s also necessary to create an implementation file in the location of the test method. You can also declare a parameter of type ITestContext or ITestResult, which will reflect the result of the method that you’re running.

JUnit vs TestNG

If you are a software tester, you’ve probably heard of JUnit and TestNG, or maybe you’re currently working on using both. Regardless, it’s important to have a clear understanding of what they both do and what the differences between them are. While both frameworks are popular, you should have a clear yardstick to use when choosing which to use.

TestNG has many features that make it more flexible than JUnit. For instance, you can group test cases into multiple groups, each containing different classes. Then, each group can run the tests. This feature is accomplished using parameters in the @Test annotation. You can learn how to create and run test suites in both tools, and you can even learn how to use the “ignore” feature.

TestNG allows you to create multiple test suites, each with its XML file that defines its configuration. This makes it possible to change the types of tests in a test suite and the test tags that trigger them. The TestNG framework also allows you to use listeners that can be added to your suite XML file.