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Unit Testing Java Applications using JUnit 5

Gain insights into unit testing with JUnit 5. Learn about assertions, assumptions, nested and parameterized tests, advanced JUnit 5 concepts, and integrating tests with Maven and Gradle.

Intermediate

42 Lessons

3h 30min

Certificate of Completion

Gain insights into unit testing with JUnit 5. Learn about assertions, assumptions, nested and parameterized tests, advanced JUnit 5 concepts, and integrating tests with Maven and Gradle.

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This course includes

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Course Overview

What You'll Learn

Course Content

Course Overview

Unit Testing is a basic and essential skill to learn for any developer. In this course, you will learn what unit tests are, why they are important, and how to test your Java applications using the JUnit 5 Framework — the most popular unit testing framework in the market for Java developers. You will start with the fundamentals of Unit Testing and JUnit 5 and then gradually you will dive deep into the core concepts like assertions, assumptions, different types of tests like nested tests, parameterized test...Show More

What You'll Learn

Learn unit testing

Write unit tests using JUnit 5

Implement unit testing

Migrate JUnit4 tests to JUnit 5

Integrate JUnit 5 with Maven and Gradle

Learn advanced concepts of JUnit 5

Learn unit testing

Course Content

Before We Begin

1 Lessons

Get familiar with unit testing Java applications using JUnit 5 and modern testing techniques.

What to Expect

Introduction to JUnit 5

5 Lessons

Look at JUnit 5 foundations, architecture, and creating your first unit test.

Introduction to Testing Pyramid and Unit Testing

Introduction to JUnit 5

JUnit 5 Architecture

Our First Unit Test with JUnit 5

Quiz Yourself on JUnit 5 Architecture

Junit 5 Core Concepts

11 Lessons

Explore JUnit 5 core testing concepts: AAA structure, assertions, assumptions, lifecycle, conditional execution, nested, tagged, repeated, and parameterized tests.

Structuring Tests Using the AAA Approach

Assertions

Assumptions

Understanding JUnit 5 Life Cycle

Conditional Execution

Quiz Yourself on JUnit5 Core Concepts

Dynamic Tests

1 Lessons

Grasp the fundamentals of creating and executing dynamic tests using @TestFactory in JUnit 5.

`TestFactory` Annotation

Dependency Injection in JUnit 5

3 Lessons

Dig into JUnit 5’s dependency injection features for enhanced test flexibility and reporting.

Using the TestInfoParameterResolver Class

Using the TestReporterParameterResovler Class

Using the RepetitionInfoParameterResolver Class

JUnit 5 Extensions

8 Lessons

Explore JUnit 5's flexible extension model, from post-processing and conditional execution to lifecycle callbacks and exception handling.

JUnit 5 Extension Model

Using the `TestInstancePostProcessor` Extension

Using the `ExecutionCondition` Extension

Using Life Cycle Callback Extensions

Using the ParameterResolver Extension

Using TestExecutionExceptionHandler Extension

Different Ways to Register Extensions

Quiz Yourself on JUnit 5 Extensions

Migrating from Junit 4 to Junit 5

2 Lessons

Approach migrating from JUnit 4 to JUnit 5, highlighting key differences and new rule support.

Difference between JUnit 4 and JUnit 5

Rule Support in JUnit 5

Appendix

7 Lessons

Step through setting up and running JUnit 5 tests with different tools and configurations.

IDE Support for JUnit 5

Setting up JUnit 5 with Maven

Setting up JUnit 5 with Gradle

Running JUnit5 Tests with Maven

Running JUnit5 Tests with Gradle

Running JUnit 4 Tests in Junit 5

Resources

BONUS: Useful Assertion Libraries

3 Lessons

Get started with assertion libraries like AssertJ, Hamcrest, and JSONAssert to enhance testing.

AssertJ

Hamcrest

JSONAssert

10.

Conclusion

1 Lessons

Examine further steps and resources to deepen expertise in unit testing.

What's Next?

Course Author

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