About TestNG Before And After Annotations And its Execution.

TestNG: TestNG is the unit testing automation framework which is widely used in selenium. This is very essential for all the automation engineers to understand the TestNG annotations before start to work on automation TestNG framework.

TestNG Before and After Annotations: 
Different kind of before and after annotations are provided by the TestNG, which are used upon the base of the Test requirement. Following are the different annotations of the TestNG.

@BeforeMethod- Much before of the all the test methods execution the BeforeMethod annotated method will be executed.

@AfterMethod- After each the test method the AfterMethod annotation will be executed.

@BeforeClass-  BeforeClass will execute prior to the before method and the Test method.

@AfterClass-  AfterClass annotated method will execute later on the AFterMethod and Test Method.

@BeforeTest- BeforeTest will execute prior to BeforeClass, BeforeMethod and Test Method.

@AfterTest- AfterTest will execute prior to AfterClass and AfterMethod.

@BeforeSuite- Before all the annotations and Test the BeforeSuit will be run.

@AfterSuite-  After all the annotations and the Test, the AfterSuit will be executed.

Prerequisites:

• TestNG should be installed in the Eclipse. 
• JDK – Java Development Kit should also installed.
• TestNG Annotations support only with Java 1.5 version or higher

Understand the execution by code:

import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
 
public class MyFirstTest
{
    @Test
    public void testCase() {
    }
 
    @BeforeSuite
    public void beforeSuite() {
        System.out.println("Before Suite method");
    }
 
    @AfterSuite
    public void afterSuite() {
        System.out.println("After Suite method");
    }
 
    @BeforeTest
    public void beforeTest() {
        System.out.println("Before Test method");
    }
     
    @AfterTest
    public void afterTest() {
        System.out.println("After Test method");
    }
     
    @BeforeClass
    public void beforeClass() {
        System.out.println("Before Class method");
    }
 
    @AfterClass
    public void afterClass() {
        System.out.println("After Class method");
    }
 
    @BeforeMethod
    public void beforeMethod() {
        System.out.println("Before Method");
    }
 
    @AfterMethod
    public void afterMethod() {
        System.out.println("After Method");
    }
}  
        

Output: