testing

A guide for writing software tests, including tests for individual functions, connected modules, and complete user scenarios. TDD, or test-driven development, means writing tests as part of the development process before or alongside the code.

In plain words
What is it for?
Planning tests, choosing between unit, integration, and end-to-end tests, and writing cases with a clear setup, action, and expected result.
Why use it?
It provides a consistent test structure and reduces common problems such as tests that depend on each other or use too many substitutes for real components.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/mercurypark/oc-setup/testing
Any agent
npx skills add mercuryPark/oc-setup --skill testing
Clone the repo
git clone --depth 1 https://github.com/mercuryPark/oc-setup

Made for: Claude Code, Codex.

Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 132 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00028 $0.00132
Opus 5 $0.00014 $0.00066
Sonnet 5 $0.00006 $0.00026
Haiku 4.5 $0.00003 $0.00013

Measured 2d ago against content hash 3e08d024bf9b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

testing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

templates/skills/testing/SKILL.md · 20 lines

What it actually says

Testing Guide

Principles

  • 각 테스트는 하나의 동작만 검증
  • Given-When-Then 패턴
  • 테스트 간 의존성 금지
  • Mock은 최소한으로

Naming

  • test("should [expected behavior] when [condition]")

Structure

  • unit: 개별 함수/컴포넌트
  • integration: 모듈 간 상호작용
  • e2e: 사용자 시나리오
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 20 lines · 28 tokens per session scan A 3e08d024bf9b

Subscribe to this mod's changes

testing is a skill published in the GitHub repository mercuryPark/oc-setup (2 stars, last pushed 4mo ago), licensed MIT. It adds 28 tokens to every session and 132 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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