How to Perform Unit Testing with JUnit | JUnit 5 Tutorial | LambdaTest

About The Video

In this JUnit 5 Tutorial, join Anton Angelov (@angelovstanton), Co-founder & CTO of Automate The Planet Ltd., as he provides an in-depth guide to unit testing in Java.

Video Chapters

00:00 Introduction

01:58 What is Unit Testing?

05:12 Setup IntelliJ & Simple Demo

11:08 WebDriver Integration Demo

25:40 LambdaTest Execution

28:30 Parallel Test Execution

30:26 Data-driven tests

33:20 CLI tests execution

34:20 TestNG Demo

36:25 Closing Words

Key Topics Covered

Introduction to Unit Testing: The video begins with an explanation of what unit testing is and its importance in software development. Unit testing involves writing tests for the smallest parts of an application, such as functions or methods, to ensure they behave as expected.

JUnit vs. TestNG: Anton discusses the two popular unit testing frameworks in Java: JUnit and TestNG. He mentions that JUnit is slightly more used than TestNG but plans to cover both frameworks in the video.

Setting Up JUnit and TestNG in IntelliJ: The tutorial includes a walkthrough on setting up a standard environment for both JUnit and TestNG in the IntelliJ IDE. This setup involves configuring Maven dependencies for JUnit 5 (Jupiter) and TestNG.

Annotations and Assertions: Key annotations and assertions used in JUnit and TestNG are explained. Annotations like @Test mark methods as test methods, while assertions are used to validate the behavior of the code being tested.

Running Tests in Parallel and Data-Driven Testing: Anton covers advanced testing strategies such as running tests in parallel to speed up the testing process and data-driven testing, which allows for testing with different input parameters.

Selenium Web Tests with JUnit: The video demonstrates how to integrate Selenium with JUnit for web testing, using data-driven tests to automate scenarios based on different input parameters. The LambdaTest playground website is used as an example for automation.

TestNG Examples: Towards the end of the video, TestNG is revisited with examples similar to those shown for JUnit. The differences in annotations and data-driven testing approaches between JUnit and TestNG are highlighted.

Maven Command Line Execution: Anton shows how to run tests using Maven from the command line, emphasizing the importance of this technique for continuous integration and deployment processes.

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