TestNG @BeforeClass Annotation

@BeforeClass: The @BeforeClass annotated method runs before the execution of test methods in a current class.

Let's understand the concept of @BeforeClass annotation through an example:

Step 1: Open the Eclipse.

Step 2: We create a simple java project.

Class1.java

Class2.java

We use the @BeforeClass annotated method in the above two classes. Class1 contains the @BeforeClass annotated method, i.e., before_class() which will be invoked before the execution of Class1 and Class2 also contains the @BeforeClass annotated method, i.e., before_class() which will be invoked before the execution of Class2.

Step 3: Now, we create the testng.xml file to configure the above two classes, i.e., Class1 and Class2.

Step 4: Run the testng.xml file. Right click on the testng.xml file, move the cursor down to Run As and then click on the 1 TestNG Suite.

Output