TestNG Annotations

@BeforeSuite: The annotate method will be run before all tests in this suite have run.

@AfterSuite: The annotated method will be run after all tests in this suite have run.

@BeforeClass: The annotated method will be run before the first test method in the current class is invoked.

@AfterClass: The annotated method will be run after all the test methods in the current class have been run.

@BeforeTest: The annotated method will be run before any test method belonging to the classes inside the tag is run.

@AfterTest: The annotated method will be run after all the test methods belonging to the classes inside the tag have run.

@BeforeMethod: The annotated method will be run before each test method.

@Test: The annotated method is a part of a test case.

@AfterMethod: The annotated method will be run after each test method.

@DataProvider: The annotated method provides data to the @Test methods. The annotated method returns an Object [][].

@BeforeGroups: The list of groups that this configuration method will run before. This method is guaranteed to run shortly before the first test method that belongs to any of these groups is invoked.

@AfterGroups: The list of groups that this configuration method will run after. This method is guaranteed to run shortly after the last test method that belongs to any of these groups is invoked.

Example:

package testng;

import org.testng.annotations.AfterMethod;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class TestNGAnnotations {

 @BeforeSuite
 public void instantiate() {
  System.out.println("Instantiate Object");
 }

 @BeforeTest
 public void dataBaseConnection() {
  System.out.println("Database Connected");
 }

 @BeforeMethod
 public void BeforeMethod() {
  System.out.println("Run before each Test Case.");
 }

 @Test
 public void testCase1() {
  System.out.println("First Test Case Result..... ");
 }
 
 @Test
 public void testCase2() {
  System.out.println("Second Test Case Result.... ");
 }

 @AfterMethod
 public void AfterMethod() {
  System.out.println("Run after each Test Case");
 }

 @AfterTest
 public void dataBaseDisconnection() {
  System.out.println("Database Disconnected");
 }

 @AfterSuite
 public void destory() {
  System.out.println("Destory Object");
 }
}

Create testng.xml:

testng.xml: Right click on Project --> TestNG --> Convert to TestNG.

Execute TestNG:
Right click on testng.xml --> Run As --> TestNG Suite OR Right click on java file --> Run As --> TestNG Test

Output: