TestNG Framework Tutorial

TestNG( Next Generation)  is a testing framework for the Java programming language created by Cédric Beust and inspired by JUnit and NUnit. The major idea and design goal of TestNG is to cover a wider range of testing categories: unit, functional, end-to-end, etc., with more powerful and easy-to-use functionalities.

It builds on the strengths of these frameworks while introducing additional features such as flexible test configuration, powerful annotations, and the ability to run tests in parallel, making it suitable for a wide range of testing requirements.

TestNG vs JUnit

 

Comparison of TestNG and JUnit

Feature	JUnit	TestNG
Annotations	Basic	Rich and flexible
Dependency Management	Not supported	Fully supported
Parallel Execution	Limited	Comprehensive
Built-in Reporting	No	Yes

 

TestNG is supported via plug-ins by each of the major IDEs

• Eclipse
•  IntelliJ IDEA
• Apache NetBeans.

TestNG supports various types of testing, including unit, integration, functional, and end-to-end testing.

The Maven build system supports TestNG. Jenkins continuous integration server has built-in support for TestNG and can track and chart test results over time. Most Java code coverage tools, such as Cobertura, work seamlessly with TestNG. TestNG is widely used in Web automation using Selenium Webdriver.

Setting Up TestNG

Prerequisites

• Java Development Kit (JDK): Download and install the latest JDK from Oracle.
• IDE: Install a Java IDE like Eclipse or IntelliJ IDEA.
• TestNG Plugin:
  In Eclipse: Go to Help -> Eclipse Marketplace, search for TestNG, and install it.
  In IntelliJ IDEA: TestNG is built-in; you only need to add it as a library.

Install the TestNG

• Install TestNG Eclipse Plugin

Download TestNG

• Download TestNG to a Maven Project

TestNG Basics

• TestNG Framework Basics

TestNG Features

• TestNG Features

TDD Cycle

• Test Driven Development Approach

TestNG Annotations

TestNG annotations control the flow and behavior of test execution. These annotations are essential for writing flexible and efficient test cases.

• TestNG Annotations

Advantages of Using Annotations

• Simplifies test configuration and setup.
• Allows modular execution with controlled dependencies.
• Enhances readability and maintainability of test scripts.

Enable/Disable Test

• TestNG Enable and Disable Test

Testing Exceptions

• TestNG Exception Test Example

Parameters from testng.xml

• TestNG Reading Parameters from TestNG Xml

TestNG Groups

• TestNG Test Groups

TestNG Dependencies

• TestNG Dependencies

SoftAssert

• SoftAssert in TestNG Framework

Custom Asserts

• Custom Assertions in TestNG Framework

TestNG Listeners

TestNG Listeners provide hooks to capture test events.

• Sample TestNG Suite file with Custom Listener

Take a screenshot when Assert fails

• How to take Screen-shot with TestNG when an Assert Fails

TestNG Quiz

 

TestNG Official Website:

• https://testng.org/