writing-tests

Create and review tests for behavioral coverage and regression detection.

2|Updated May 5, 2026
One-click install
npx skills add https://github.com/OrestesK/pi --skill writing-tests-orestesk
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: writing-tests
Source: https://github.com/OrestesK/pi/tree/main/skills/writing-tests
Command: npx skills add https://github.com/OrestesK/pi --skill writing-tests-orestesk

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps you create and review tests that provide meaningful regression evidence instead of duplicating implementation details or framework behavior.

Core Features & Use Cases

  • Behavior-First Testing: Design tests around externally meaningful behavior, stable contracts, realistic inputs, and important failure paths.
  • Test Structure and Placement: Follow local repository conventions, extend related coverage when appropriate, and choose the smallest effective test shape.
  • Reliable Test Quality: Keep tests deterministic, isolate boundaries with focused mocks, use precise assertions, and verify that tests would catch real regressions.
  • Review and Reporting: Assess test feedback, fixtures, helpers, snapshots, skipped cases, and verification evidence using practical quality criteria.

Quick Start

Ask the writing-tests skill to review the proposed tests for behavioral coverage, determinism, mock boundaries, assertion quality, and alignment with nearby repository conventions.

Frequently Asked Questions about writing-tests

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

FAQPage Schema
How do I write deterministic tests that catch real regressions?

Behavior-focused testing prioritizes stable contracts, realistic inputs, and important failure paths over duplicating implementation details. This approach ensures tests provide meaningful regression evidence by validating externally observable outcomes instead of framework internals.

What's the best way to review test fixtures and mocks for quality?

Reviewing test fixtures and mocks involves assessing boundary isolation, determinism, and assertion precision. You should evaluate whether mocks are focused enough and whether verification evidence confirms the test would fail if the underlying behavior broke.

How do I structure tests to follow existing repository conventions?

Test structure should extend related coverage when appropriate and choose the smallest effective test shape. Aligning with local repository conventions means placing test files, helpers, and fixtures where similar tests already live in the codebase.

Can I use this approach for both unit and integration test scenarios?

Yes, this testing approach applies across unit, integration, UI, contract, characterization, and live validation scenarios. It scales by adjusting boundary isolation and mock scope while maintaining behavior-focused coverage and precise assertions.

Why do my tests pass but fail to catch actual regressions?

Tests that pass without catching regressions often duplicate implementation logic or use overly broad assertions. Shifting to behavior-focused coverage with precise assertions and explicit verification evidence ensures tests actually validate meaningful outcomes.