TestNG® – the powerful testing framework for Java developers. Whether you’re new to testing or looking for advanced techniques, this tutorial aims to give you the knowledge and skills you need to use TestNG effectively. Before we dive headfirst into the world of TestNG, let’s make sure our environment is primed and ready. We’ll walk through the prerequisites and installation process to ensure you’re all set up for success.

Once your environment is prepped, it’s time to start writing some code. We’ll explore TestNG’s annotation-based approach, making test development a breeze. Say goodbye to convoluted setups and hello to elegant, readable tests. With our tests written, it’s time to put them to the test. We’ll learn how to execute our tests using a variety of methods, from simple command-line execution to seamless integration with your favorite IDE and even leveraging Ant tasks for automation.

Armed with a solid understanding of TestNG’s capabilities, you’re now equipped to tackle testing challenges with confidence. Whether you’re a seasoned developer or just starting out, TestNG empowers you to write efficient, comprehensive tests that ensure the quality and reliability of your code.

TestNG Tutorial and Example – A Comprehensive Journey

Embarking on your journey into software testing with TestNG opens doors to a world of efficient and comprehensive testing practices. Whether you’re just starting or seeking to refine your skills, understanding TestNG essentials is crucial. In this guide, we’ll walk through everything you need to know, from setting up TestNG to executing tests and exploring advanced techniques.

  • Setup and Installation: Before diving into TestNG, it’s essential to ensure your environment is set up correctly. TestNG requires JDK 5 or higher. You’ll need to download the latest TestNG release from the official website and follow the installation instructions provided. Once installed, you’ll have access to a suite of tools and libraries essential for testing Java applications;
  • Writing Your First Tests: With TestNG, writing tests becomes intuitive and straightforward. Unlike traditional testing frameworks, TestNG leverages annotations to define test methods, making the process more streamlined and readable. We’ll explore how to write simple test codes using TestNG, covering basic annotations like @Test, @BeforeMethod, and @AfterMethod;
  • Test Execution: Executing tests with TestNG is a breeze, whether through the command line, IDE integration, or build automation tools like Ant or Maven. We’ll walk through the different methods of running TestNG tests, including configuring test suites, executing tests via command-line interfaces, and integrating TestNG with popular IDEs like IntelliJ IDEA and Eclipse.

Prerequisites

Ensure JDK 5 or higher is installed.

TestNG Download and Installation

Download the latest TestNG release from here and extract the zip. Key components include:

  • Testng-5.14.1.jar (essential for project setup);
  • Documentation;
  • Example codes;
  • Source codes;
  • Readme.

Start your TestNG journey with examples and documentation.

Just a Simple Test Code Using TestNG

No need to extend specific classes or enforce naming conventions. Simply use the @Test annotation.() method is invoked before test methods.

Run Test with Command

Configure TestNG using testng.xml. Run tests using:

java -ea -classpath .;testng-5.14.1.jar org.testng.TestNG testng.xml

Run TestNG Test with IDE

For IntelliJ IDEA, add unit test to TestNG configuration via Tools->Run.

Run TestNG Test with Ant

Use Ant task to run tests. Example Ant project XML provided.

Conclusions

Executing tests should be a joy, not a chore. With TestNG, you’ve got options galore – command line, IDE integration, you name it. 

TestNG isn’t just about the basics. We’ve taken you on a journey into the realm of advanced techniques – parameterized tests, test dependencies, and more. Armed with these tricks up your sleeve, you’ll be unstoppable

By Core java