writing-tests

What problem does it solve?

Guidelines for writing tests in IntelliJ IDEA codebase. Use when creating new test classes or test methods.

Core Features & Use Cases

• JUnit 5-first: Use @TestApplication instead of extending test case classes.
• Shared fixtures: Use companion objects to hold project/module fixtures for reuse.
• Lifecycle management: Use @BeforeAll, @AfterAll, @BeforeEach, and @AfterEach for setup and teardown; prefer @TestDisposable for disposable resources.
• Run in EDT: Apply testing annotations to run tests in the EDT when required.
• Showcase patterns: Refer to showcase tests and fixtures for concrete examples.

Quick Start

Create a new test class annotated with @TestApplication and follow the companion object fixture pattern to bootstrap tests.