Workshop – JUnit5 – Effective testing of Java applications

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Description:

“JUnit5 – Effective testing”

Target group: This workshop is aimed at Java developers who want to expand their unit testing skills and software testers who want to take Java application testing to a higher level. The workshop is also ideal for development teams that want to introduce a uniform and professional testing strategy to increase software quality. This workshop also offers an excellent introduction for anyone looking for a comprehensive introduction to the concepts and practices of testing with JUnit 5. Both beginners and developers with advanced knowledge benefit from the practical examples and exercises to develop a deep understanding of the possibilities of JUnit 5.

Course requirements: Basic knowledge of Java programming is required. Experience using development tools such as IDEs (e.g., IntelliJ, Eclipse) is advantageous but not absolutely necessary.

Course Description:

Welcome to our intensive two-day workshop, “Effective Testing with JUnit 5”, where you will learn systematically and step by step how to use JUnit’s latest features and best practices to create reliable and maintainable unit tests for your Java applications. In this workshop, each concept is explained in detail, supported by practical examples, and reinforced with exercises to apply what you have learned immediately. This workshop is aimed at both beginners who want to build a solid foundation in Java application testing and experienced developers who want to expand their knowledge of the advanced features and efficient use of JUnit 5 to ensure high-quality software, making development cycles more efficient.

Unit tests are a fundamental building block of the agile development process and a crucial factor for the quality and stability of your software. They make it possible to detect errors early and increase the software’s maintainability, which can reduce development costs in the long term. JUnit is the most widely used framework for testing Java applications, giving you all the tools you need to develop high-quality tests. With JUnit5 you have a modern and powerful platform that offers numerous advantages, from more flexible test configurations to improved options for parameterisation and integration. In this workshop, you will learn how to use the new functions of JUnit 5 optimally and how you can effectively integrate them into your development processes to ensure and increase the quality of your software in the long term. You will learn how to design tests to be easy to understand, maintain, and reusable, which is particularly beneficial in larger projects.

Learning objectives:

After completing the workshop, participants will be able to:

  1. Understand the differences and advantages of JUnit 5 compared to previous versions.
  2. Write effective unit tests and apply best practices in test development.
  3. To understand the JUnit 5 architecture and the role of Platform, Jupiter and Vintage modules.
  4. Leverage advanced features such as dynamic testing, custom tags, conditional execution, and test set reuse.
  5. Integrate JUnit 5 with common development tools and build systems like Maven and Gradle.

Course content:

  1. Introduction to JUnit and the importance of unit testing
    • Basic concepts of testing in software development
    • Why JUnit? Role of testing in agile development
    • Test Driven Development (TDD) with JUnit
  2. The architecture of JUnit 5
    • Divided into modules: Platform, Jupiter and Vintage
    • How modularising JUnit 5 improves testability and extensibility
    • Differences between JUnit 4 and JUnit 5 – what’s new?
  3. Basics of testing with JUnit 5
    • Setting up the project with Maven and Gradle
    • “@DisplayName” – Human-readable test names for better understandability
    • Test-Lifecycle-Annotierungen („@BeforeEach“, „@AfterEach“, „@BeforeAll“, „@AfterAll“)
    • Assertions (“Assertions.assertEquals()”, “assertTrue()”, etc.) and their extensions
  4. Advanced features
    • Parameterised testing: Using @ParameterizedTest for more flexibility and reusability
    • Test factories and dynamic tests: “@TestFactory” for creating dynamic tests
    • Conditional tests: Run tests based on conditions (“@EnabledOnOs”, “@DisabledIf”, etc.)
    • Tagging and filtering tests: Using @Tag to group and selectively run tests
  5. Extension of JUnit 5
    • Write your extensions: Using Extension to customise test behaviour
    • Third-party extensions: Integration of libraries like Mockito to create mocks and stubs
  6. Best practices and testing strategies
    • Write maintainable tests: Building readable and reusable test classes
    • Avoid sources of error: Common pitfalls and problems when developing unit tests
    • Test Driven Development (TDD): Practical approaches and examples for applying TDD with JUnit 5
  7. Practical exercises and examples
    • Step-by-step instructions to set up a new JUnit 5 project
    • Code examples: Hands-on with practical examples of typical test scenarios
    • Team exercises and collaboration: Working together in groups to solve complex test tasks and deepen what you have learned
    • Independent exercises: Opportunity to directly apply what you have learned and develop your test cases

Teaching methods:

  • The workshop includes interactive lectures, live demos, group discussions and practical exercises.
  • Participants are actively involved in learning by writing their test cases, implementing best practices in realistic scenarios and developing solutions together.
  • Interactive quizzes and tasks are available to deepen understanding and ensure learning progress.
  • Participants benefit from direct interaction with the course leader and the opportunity to ask questions in real-time.

Why should you attend this workshop?

Testing is an indispensable part of software development. By learning JUnit 5, you will improve the quality of your applications and your ability to develop more efficiently and safely. JUnit 5 offers many possibilities that help beginners and experienced developers expand their testing know-how. In this workshop, you will learn practically how to use the latest features of JUnit 5 in your development process to increase your software’s quality significantly. The direct exchange with the course instructor and other participants also offers you valuable insights into proven test strategies and best practices from practice.

Benefits for participants:

  • Practical approach: We offer many practical examples and exercises so that you can immediately apply what you have learned.
  • Flexible Format: Choose between on-site or online participation that best suits your needs.
  • Intensive exchange: Benefit from the opportunity to ask questions directly and work on solutions with other participants.
  • Flexibility and modularity: Use JUnit 5’s modular architecture to better organise and customise your tests.

Certification:

At the end of the workshop, all participants receive a participation certificate confirming the knowledge they have acquired in ​​JUnit5.

Conclusion:

With JUnit5, you get a powerful tool that makes your tests more maintainable and meaningful. In this workshop, you will learn how to use the full potential of JUnit 5 to develop high-quality software. Benefit from our comprehensive introduction to the world of unit testing and take the next step in your career as a Java developer.

Registration:

Interested? Register today for the intensive two-day workshop—either online or on-site—and begin your journey into the world of automated testing with JUnit5!

Language:

German or English

Workshop Duration:

2 days

Location

In house or remote