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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

Course Overview

What You'll Learn

Course Content

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

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

Familiarity with unit testing in JUnit 5

Course Content

Getting Started

1 Lessons

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

What’s This Course About?

Writing Basic Tests

13 Lessons

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

5 Lessons

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

4 Lessons

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

6 Lessons

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.

Simple Parameterized Test

@ValueSource and @EnumSource

@MethodSource and @CsvSource

Types of DynamicTest

Quiz on Parameterized and Dynamic Tests

Test Instance Lifecycle in JUnit 5

2 Lessons

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

Test Instance Lifecycle

Quiz on Test Instance Lifecycle

Extension Model

14 Lessons

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

Registering Extensions

Extension Context

Parameter Resolver

Test Instance Post-processing

Test Execution Conditions

Exception Handling

Test Lifecycle Callbacks

Using Store

Test Templates

Sources of Arguments in Parameterized Tests

Argument Converter

Quiz on Extension Model

Exercise: API Tests

Solution Review: API Tests

JUnit Platform

4 Lessons

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

JUnit 4 Migration

TestEngine in JUnit 5

Discover and Execute Tests

Launcher

10.

Test Execution Order

3 Lessons

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

Test Method Order

Test Class Order

Quiz on Test Execution Order

11.

Conclusion

1 Lessons

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

Wrap-Up!

Library Management System

Project

Course Author

Fu Cheng

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