What is the AAA pattern enforced by this skill?

The AAA (Arrange-Act-Assert) pattern is a structural standard that separates test setup, the execution of the logic, and the verification of results for better readability.

Does this skill support JUnit 4?

No, this skill is specifically optimized for JUnit 5 (JUnit Jupiter) standards and modern Java testing features.

How does it handle test naming?

It enforces the use of @DisplayName annotations to provide descriptive, human-readable explanations of what each test validates, moving beyond simple method names.

What are the default coverage requirements?

The skill targets a minimum of 80% for both line and branch coverage, with a 100% coverage requirement for critical business paths.

JUnit Core Testing Standards

Name: JUnit Core Testing Standards
Author: JongminChung

byJongminChung

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Security & Testing

Implements professional JUnit 5 testing patterns and coverage standards for high-quality Java applications.

About

The JUnit Core skill equips Claude with specialized knowledge of JUnit 5 best practices, focusing on the Arrange-Act-Assert (AAA) pattern and standardized test organization. It ensures that Java projects maintain high code quality through strict 1:1 mapping between production and test classes, descriptive naming conventions using @DisplayName annotations, and rigorous 80% minimum line and branch coverage requirements. This skill is essential for developers who want to automate the creation of robust, maintainable, and comprehensive test suites while maintaining consistent engineering standards across their Java ecosystem.

Key Features

Provides automated coverage analysis and improvement patterns
Ensures 80% line and branch coverage minimums for all code
Maps test classes 1:1 with production classes for better organization
Enforces AAA (Arrange-Act-Assert) test structure for maximum clarity
2 GitHub stars
Standardizes JUnit 5 @DisplayName and naming conventions

Use Cases

Generating new unit tests for complex business logic in Java services
Analyzing and improving test coverage metrics for critical code paths
Standardizing an existing Java codebase with modern JUnit 5 patterns

About

Key Features

Provides automated coverage analysis and improvement patterns
Ensures 80% line and branch coverage minimums for all code
Maps test classes 1:1 with production classes for better organization
Enforces AAA (Arrange-Act-Assert) test structure for maximum clarity
2 GitHub stars
Standardizes JUnit 5 @DisplayName and naming conventions

Use Cases

Generating new unit tests for complex business logic in Java services
Analyzing and improving test coverage metrics for critical code paths
Standardizing an existing Java codebase with modern JUnit 5 patterns