clean-code-ch09-unit-tests

Analyze test code for TDD laws, readability, and single-concept structure.

4|Updated Mar 28, 2026
One-click install
npx skills add https://github.com/hatlesswizard/clean-code-skills --skill clean-code-ch09-unit-tests
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: clean-code-ch09-unit-tests
Source: https://github.com/hatlesswizard/clean-code-skills/tree/main/ch09-unit-tests
Command: npx skills add https://github.com/hatlesswizard/clean-code-skills --skill clean-code-ch09-unit-tests

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps teams ensure unit tests follow TDD laws, maintain readability, apply a domain-specific testing language, and structure tests with one concept per test for durable codebases.

Core Features & Use Cases

  • Enforces TDD laws (First, Second, Third) and the BUILD-OPERATE-CHECK pattern to improve test discipline.
  • Promotes domain-specific testing language through helper methods and fluent test APIs to hide implementation details.
  • Guides on test organization, readability, and maintainability, including single-concept-per-test guidance and practical clean-test principles.

Quick Start

Run the unit-test quality checker against your test suite to identify cleanliness, structure, and domain-language issues.

Frequently Asked Questions about clean-code-ch09-unit-tests

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What makes a unit test clean and readable?

Clean unit tests follow the BUILD-OPERATE-CHECK pattern, use a domain-specific testing language to hide implementation details, and verify a single concept per test. This Skill analyzes test code to enforce these readability and structure principles.

How do I check if my test suite follows TDD laws?

To check if your test suite follows TDD laws, analyze your test code against the First, Second, and Third laws of TDD. This Skill evaluates your suite to ensure test discipline and adherence to these foundational testing principles.

Does this unit test analyzer work with integration tests across different languages?

Yes, this unit test analyzer works with integration test suites across multiple programming languages. It evaluates test structure, readability, and the BUILD-OPERATE-CHECK pattern regardless of the specific language used.

How do I apply the BUILD-OPERATE-CHECK pattern to my test code?

To apply the BUILD-OPERATE-CHECK pattern, structure tests by building data, operating on it, and checking results. This Skill guides you in adopting this pattern and using fluent test APIs to improve overall test maintainability.

What are the FIRST principles for unit tests and how do I enforce them?

The FIRST principles require tests to be FAST, INDEPENDENT, REPEATABLE, SELF-VALIDATING, and TIMELY. You can enforce them by providing optional configuration to tailor checks for these principles when analyzing your codebase.

When should I refactor my test suite for a domain-specific testing language?

You should refactor your test suite for a domain-specific testing language when implementation details clutter test logic. This Skill helps identify these issues, promoting fluent test APIs and helper methods to hide complexity.