iOS Testing

iOS Testing is a skill for Claude Code, Codex from niels-emmer/myace. It costs 27 tokens per session (310 once invoked), scanned A, original, MIT.

A testing guide for iOS apps using XCTest and XCUITest, plus snapshot checks and performance measurements. Unit tests check small pieces of logic, while UI tests check complete user actions through the app.

In plain words
What is it for?
Use it to test view models, networking, data processing, screen rendering, login, purchases, settings navigation, and other critical iOS flows.
Why use it?
It helps test business logic quickly while reserving slower UI tests for important user journeys, and it checks that screens and performance do not regress.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for aider. Also seen: mentions Codex; built for aider; mentions OpenCode.

Good fit Use it to test view models, networking, data processing, screen rendering, login, purchases, settings navigation, and other critical iOS flows.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/niels-emmer/myace/ios-testing
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.

Any agent
npx skills add niels-emmer/myace --skill ios-testing
Clone the repo
git clone --depth 1 https://github.com/niels-emmer/myace

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for iOS Testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/niels-emmer/myace/ios-testing.svg)](https://agentmods.dev/skills/niels-emmer/myace/ios-testing)
Your own site
<a href="https://agentmods.dev/skills/niels-emmer/myace/ios-testing"><img src="https://agentmods.dev/badge/skills/niels-emmer/myace/ios-testing.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00027 $0.00310
Opus 5 $0.00014 $0.00155
Sonnet 5 $0.00005 $0.00062
Haiku 4.5 $0.00003 $0.00031

Measured 4d ago against content hash a25d3e9ec816, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

iOS 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 4d 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.

collections/additional/ios-developer/skills/ios-testing/SKILL.md · 25 lines

What it actually says

Purpose

Test iOS apps at the right level — fast unit tests for logic, UI tests for critical flows.

Checklist

  • Unit tests (XCTest): test view models, networking layer, data transformation logic. Fast — no UI dependency.
  • UI tests (XCUITest): test critical user journeys (login, purchase, settings navigation). Slow — use sparingly.
  • Snapshot tests: use swift-snapshot-testing or equivalent for view rendering. Cover default, empty, and error states.
  • Performance baselines: set measure() blocks for critical code paths (data parsing, image processing, database queries).
  • Test independence: each test sets up its own state and tears down after. No shared mutable state between tests.
  • CI integration: tests run on every PR. UI tests run on a physical device or simulator matrix covering target OS versions.

Expected output

A test suite where unit tests cover business logic, snapshot tests cover UI rendering, and UI tests cover only critical user journeys.

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. 4d ago First seen · 25 lines · 27 tokens per session scan A a25d3e9ec816

Subscribe to this mod's changes

iOS Testing is a skill published in the GitHub repository niels-emmer/myace (1 stars, last pushed yesterday), licensed MIT. It adds 27 tokens to every session and 310 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 2026-09-03.

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