Java Brains

Introduction and agenda

Why write tests?

Why do we need a testing framework?

Why JUnit 5?

JUnit 5 Architecture

Creating a new JUnit 5 Maven project

Creating a JUnit test

Running a test

The @Test annotation

Using Assertions

Assert methods

Test driven development with JUnit

Maven surefire plugin integration

Asserting exceptions with assertThrows

Life cycle and test antipatterns to avoid

Using JUnit lifecycle hook annotations

Examining BeforeAll and AfterAll

Changing default TestInstance behavior

Using DisplayName and Disabled annotations

Conditional executions and assumptions

Using AssertAll

Writing nested test classes

Using supplier for assert messages

Using RepeatedTest

Tagging tests with @Tag

Using TestInfo and TestReporter

Wrap Up