Advanced JUnit Training
Level
AdvancedDuration
24h / 3 daysDate
Individually arrangedPrice
Individually arrangedAdvanced JUnit Training
Advanced JUnit 5 is a next-generation framework for creating automated unit tests in Java, offering features such as parameterized tests, dependency injection, full Java 8 support, and a modern API that makes it easier than ever to extend the framework and adapt it to project needs. Frameworks like JUnit 5 are now widely used not only for unit testing but also for higher-level functional tests.
Who is this training for?
Anyone who wants to gain or deepen their knowledge of unit testing, JUnit 5, Mockito 2, and best practices in writing unit tests.
What You Will Learn
- How to perform a complete process from reading data, through transformations, to delivering results
- Deep understanding of JUnit 5 and its features
- How to use Mockito for mocking dependencies
- How to write clean and readable assertions using AssertJ
- Advanced JUnit 5 features: parameterized tests, nested and repeated tests, extension model
- Integration with Spring Boot, CI/CD pipelines, and test reporting
- Best practices for testing databases, APIs, and services using tools like WireMock and TestContainers
- Migration from JUnit 4 to JUnit 5
Training Program
-
Unit Testing Theory
- Motivation for writing unit tests
- Principles of writing good tests
- Best practices and common mistakes (recurring throughout the training)
- Three main tools: JUnit 5, Mockito, AssertJ
- Recap and deep dive into popular tool combinations for unit testing in Java
-
JUnit Architecture Introduction
- Connecting JUnit to the project
- Mockito: proper usage, less common features useful in daily work
- AssertJ: the most readable assertion library in Java
-
JUnit 5 – Advanced Topics
- Assumptions
- Test lifecycle overview
- Repeated and nested tests – use cases
- Parameterized tests – different types
- Working with files
- Method injection – introduction to Extension Model
-
Extension Model deep dive
- Built-in extensions
- Writing custom extensions
- Sharing reusable code between tests via extensions
-
JUnit in Real Life
- Configuring JUnit 5 with Maven/Gradle
- Test execution optimization
- Report generation and CI/CD integration
- Migrating from JUnit 4 to JUnit 5
-
Spring Boot Testing Support
- Differences between Spring Boot context tests and typical unit tests
- When to use a simple test vs full Spring Boot context
- @SpringBootTest annotation
- Test configuration and test properties
- Bean mocks
- Tests with running server
- MockMvc
- Slice tests
-
Database Integration Testing
- Providing a database for tests
- Unit testing database interactions
- When to use unit vs integration tests
- Testing transactional code
- Spring Security integration
-
Service Integration Testing
- WireMock
- TestWebClient vs TestRestTemplate
- WireMock integration tests
- TestContainers – use cases and advantages
- Contract testing – demo
- Recap and Final Project
