What is the AAA pattern included in this skill?

AAA stands for Arrange-Act-Assert. This skill enforces this structure to ensure tests are readable, organized, and focused on a single concept.

How does this skill assist with TDD?

It provides a structured workflow for the Red-Green-Refactor cycle, ensuring you write failing tests first and maintain minimal, clean implementation code.

Does it provide guidance on mocking?

Yes, it includes principles on when to use mocks, the different types of test doubles (stubs, spies, fakes), and how to avoid over-mocking.

Can this help me achieve 80% code coverage?

Yes, it provides standards and strategies for reaching high coverage while ensuring that the quality of tests remains more important than the percentage.

Is this testing skill language-specific?

No, these principles are language-agnostic and can be applied to any programming language including JavaScript, Python, Go, Java, and C#.

Testing Principles

Name: Testing Principles
Author: shinpr

byshinpr

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Security & Testing

Enforces language-agnostic testing best practices including TDD, AAA patterns, and high-quality coverage standards.

About

The Testing Principles skill provides a comprehensive framework for writing, reviewing, and organizing automated tests across any programming language. It guides developers through the Test-Driven Development (TDD) cycle, ensures adherence to the Arrange-Act-Assert (AAA) pattern, and implements a balanced testing pyramid strategy. By focusing on test independence, meaningful assertions, and proper mocking boundaries, this skill helps teams build reliable, maintainable test suites that provide fast feedback and ensure high confidence in production code quality.

Key Features

Standardized test structure using the AAA (Arrange-Act-Assert) pattern
Best practices for mocking, stubs, and test doubles
Automated quality criteria for test independence and coverage
Full TDD lifecycle guidance (Red-Green-Refactor)
35 GitHub stars
Multi-tier test strategy implementation (Unit, Integration, E2E)

Use Cases

Establishing a robust testing strategy for new software projects
Refactoring legacy codebases with confidence using characterization tests
Conducting automated code reviews focused on test quality and reliability

About

Key Features

Standardized test structure using the AAA (Arrange-Act-Assert) pattern
Best practices for mocking, stubs, and test doubles
Automated quality criteria for test independence and coverage
Full TDD lifecycle guidance (Red-Green-Refactor)
35 GitHub stars
Multi-tier test strategy implementation (Unit, Integration, E2E)

Use Cases

Establishing a robust testing strategy for new software projects
Refactoring legacy codebases with confidence using characterization tests
Conducting automated code reviews focused on test quality and reliability