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Cédric Beust (cedric at beust.com)
Current version: 7.6.0
Created: April 27th, 2004
Last Modified:  May 19th, 2022

TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities that make it more powerful and easier to use, such as:

TestNG is designed to cover all categories of tests:  unit, functional, end-to-end, integration, etc...

I started TestNG out of frustration for some JUnit deficiencies which I have documented on my weblog here and here Reading these entries might give you a better idea of the goal I am trying to achieve with TestNG.  You can also check out a quick overview of the main features and an article describing a very concrete example where the combined use of several TestNG's features provides for a very intuitive and maintainable testing design.

Here is a very simple test:


package example1;

import org.testng.annotations.*;

public class SimpleTest {

 public void setUp() {
   // code that will be invoked when this test is instantiated

 @Test(groups = { "fast" })
 public void aFastTest() {
   System.out.println("Fast test");

 @Test(groups = { "slow" })
 public void aSlowTest() {
    System.out.println("Slow test");

The method setUp() will be invoked after the test class has been built and before any test method is run.  In this example, we will be running the group fast, so aFastTest() will be invoked while aSlowTest() will be skipped.

Things to note:

Once you have compiled your test class into the build directory, you can invoke your test with the command line, an ant task (shown below) or an XML file:


<project default="test">

 <path id="cp">
   <pathelement location="lib/testng-testng-5.13.1.jar"/>
   <pathelement location="build"/>

 <taskdef name="testng" classpathref="cp"
          classname="org.testng.TestNGAntTask" />

 <target name="test">
   <testng classpathref="cp" groups="fast">
     <classfileset dir="build" includes="example1/*.class"/>

Use ant to invoke it:
c:> ant
Buildfile: build.xml

[testng] Fast test
[testng] ===============================================
[testng] Suite for Command line test
[testng] Total tests run: 1, Failures: 0, Skips: 0
[testng] ===============================================

Total time: 4 seconds
Then you can browse the result of your tests:
start test-output\index.html (on Windows)


TestNG Upto v7.5: JDK 8 or higher.

TestNG v7.6.0 and above: JDK 11 or higher.


Locations of the projects

If you are interested in contributing to TestNG or one of the IDE plug-ins, you will find them in the following locations:

Bug reports

If you think you found a bug, here is how to report it:

For more information, you can either download TestNG, read the manual or browse the links at the top.


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