Understanding TestNG Annotations

In previous post we have seen how to do setup and run through simple testng file, in this post we will try to understand different annotations in TestNG

Ex. in TestNG xml file below would be hierarchy or Annotations levels in TestNG.

<Suite>
       <test>
             <Classes>
                     <Method>
                             <test>

                     </method>
            </Classes>
      </test>
</Suite>

Above hierarchy talks about @Test is the smallest annotation here. @Method will be executed first, before and after the execution of @Test. The same way @Class will be executed first, before and after the execution of @Method and so on.

Let's create a simple example and run the same

	package com.test;
	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 TestNGFlow {
	@Test
	public void testCase1() {
	System.out.println("This is the Test Case 1");
	}
	@Test
	public void testCase2() {
	System.out.println("This is the Test Case 2");
	}
	@BeforeMethod
	public void beforeMethod() {
	System.out.println("I will be executed before Each Test Method");
	}
	@AfterMethod
	public void afterMethod() {
	System.out.println("I will be executed before Each Test Method");
	}
	@BeforeClass
	public void beforeClass() {
	System.out.println("I will execute after test and test suite - ");
	}
	@AfterClass
	public void afterClass() {
	System.out.println("This will execute after the Class");
	}
	@BeforeTest
	public void beforeTest() {
	System.out.println("I will execute Before any Test method/case executes");
	}
	@AfterTest
	public void afterTest() {
	System.out.println("I will execute After all Test method/case executes");
	}
	@BeforeSuite
	public void beforeSuite() {
	System.out.println("I will execute before the Test Suite");
	}
	@AfterSuite
	public void afterSuite() {
	System.out.println("This will execute after the Test Suite");
	}
	}

view raw testngannotation.java hosted with ❤ by GitHub

 
Output :

I will execute  before the Test Suite
I will execute Before any Test method/case executes
I will execute after test and test suite -
I will be executed before Each Test Method
This is the Test Case 1
I will be executed before Each Test Method
I will be executed before Each Test Method
This is the Test Case 2
I will be executed before Each Test Method
This will execute after the Class
I will execute After all Test method/case executes
PASSED: testCase1
PASSED: testCase2

===============================================
    Default test
    Tests run: 2, Failures: 0, Skips: 0
===============================================

This will execute after the Test Suite