TestNG @BeforeGroups Annotation

TestNG allows the testers to create multiple test cases into a single group through the use of attribute 'group' in the @Test annotation. We can say that TestNG groups allow you to add similar functionalities in the same group. For example, student_id, student_name, student_address are the details of a student, and all these details are added in a same group, i.e., "student details".

@BeforeGroups: The @BeforeGroups annotated method will run only once before all the test methods belonging to a specified group have been executed.

Let's understand the @BeforeGroups annotation through an example.

Step 1: Open the Eclipse.

Step 2: We create a simple java project.

Class1.java

package com.javatpoint;
import org.testng.annotations.BeforeGroups;
import org.testng.annotations.Test;
public class Class1 
{
@BeforeGroups("IT Department")
public void before_it()
{
System.out.println("This method will be executed before the execution of IT Department group");
}
@Test
public void testcase1()
{
System.out.println("HR");
}
 @Test(groups= {"IT Department"})
public void testcase2()
{
System.out.println("Software Developer");
}
@Test(groups= {"IT Department"})
public void testcase3()
{
System.out.println("QA Analyst");
}
}

In the above, we have created the java project in which we have defined the @BeforeGroups annotated method, and in @BeforeGroups, we pass "IT Department" which means that @BeforeGroups annotated method, i.e., before_it() will be invoked before the execution of all the test methods belonging to an "IT Department" group.

Step 3: Now, we create a testng.xml file to configure the above class.

testng.xml file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="test_suite">
<test name="IT Department">
<classes>
<class name="com.javatpoint.Class1"/>
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->

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.