All About JUnit5

Gain insights into JUnit 5, explore its advantages over JUnit 4, and delve into its features like assertions, parameterized tests, dependency injection, and test execution order. Discover hands-on projects to cement your skills.

Beginner

58 Lessons

18h

Certificate of Completion

AI-POWERED

Explanations

AI-POWERED

Explanations

This course includes

1 Project

80 Playgrounds

8 Quizzes

This course includes

1 Project

80 Playgrounds

8 Quizzes

Course Overview

JUnit 5 is a standard framework for unit testing in Java. Released in 2017, JUnit 5 is a major improvement over JUnit 4 and supports a lot of new methods. Many projects have migrated from JUnit 4 to JUnit 5. JUnit 5 is also the default test framework for new projects. JUnit 5 is composed of three sub-projects: JUnit Platform, JUnit Jupiter, and JUnit Vintage. Details of these sub-projects are discussed in the course. This course first discusses the advantages of JUnit 5 over the previous versions and then ...Show More

TAKEAWAY SKILLS

Unit Testing

What You'll Learn

Familiarity with unit testing in JUnit 5

A deep understanding of life cycle annotations in JUnit 5

The ability to write unit tests in JUnit 5 for a real project

What You'll Learn

Familiarity with unit testing in JUnit 5

Course Content

Getting Started

Learn how to use JUnit 5 for effective Java unit testing and legacy support.

What’s This Course About?

Writing Basic Tests

Unpack the core of writing test methods, using annotations, assertions, and exception handling in JUnit 5.

Annotations Assertions: assertTrue() and assertFalse()Assertions: assertNull() and assertNotNull()Assertions: assertEquals() and assertNotEquals()Assertions: assertArrayEquals() and assertIterableEquals()Assertions: assertSame() and assertNotSame()Assertion: assertAll()Assertions: assertThrows() and assertThrowsExactly()Assertion: assertTimeout()Assertion: assertLinesMatch()Assertions: fail() and assertInstanceOf()Assertion: assertDoesNotThrow()Quiz on Writing Basic Tests

Annotations, Tagging, and Filtering

Examine JUnit 5's annotations, tagging, filtering for optimized test management and execution.

Lifecycle Annotations Disabled Tests and Display Name Generator Boolean Assumptions Tags and Filtering Quiz on Annotation, Tagging, and Filtering

Nested tests in JUnit 5

Apply your skills to organize and test complex functionalities using JUnit 5 nested tests.

@Nested Tests Quiz on Nested Tests Exercise: Test a Stack Solution Review: Test a Stack

Dependency Injections

Dig into dependency injections, parameter resolvers, repeated tests, and exercise solutions in JUnit 5.

Parameter Resolver: TestInfo Parameter Resolver: TestReporter Repeated Tests Quiz on Repeated Tests Exercise: Dependency Injection Using CDI Solution Review: Dependency Injection Using CDI

Parameterized and Dynamic Tests

5 Lessons

Tackle parameterized tests with @ValueSource, @EnumSource, @MethodSource, @CsvSource, and advanced dynamic testing.

Test Instance Lifecycle in JUnit 5

2 Lessons

Approach JUnit 5 test instance lifecycles to ensure test independence and manage mutable state effectively.

Extension Model

14 Lessons

Sharpen your skills in extending JUnit 5 with custom extensions, parameter resolvers, and test templates.

JUnit Platform

4 Lessons

Look at JUnit 4 migration, TestEngine, test discovery and execution, and the Launcher API.

10.

Test Execution Order

3 Lessons

Master the steps to control test method and class execution order in JUnit 5.

11.

Conclusion

1 Lesson

Build a foundation in essential JUnit 5 skills and practical knowledge.

Library Management System

Project

Course Author

Trusted by 1.4 million developers working at companies

Anthony Walker

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Emma Bostian 🐞

@EmmaBostian

Evan Dunbar

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Carlos Matias La Borde

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Vinay Krishnaiah

Software Developer

Eric Downs

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DevOps Engineer

Anthony Walker

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Emma Bostian 🐞

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