Compose ships two parallel test entry points: a JUnit4 TestRule (createComposeRule() and friends) and a multiplatform suspending lambda (runComposeUiTest { }). Each one independently sets up the recomposer, MainTestClock, and IdlingResource. Mixing them in a single test produces double-environment bugs that are hard to diagnose. This skill picks the right one and surfaces the v1 → v2 deprecation that bites every existing codebase.
Choosing Test Rule Vs Runtest is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/choosing-test-rule-vs-runtest/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when the user asks "ComposeTestRule vs ComposeUiTest", reports `IllegalStateException: setContent can only be called once`, mentions `runComposeUiTest`, the v2 deprecation warning, `effectContext`, custom `ComponentActivity`, or "host tests need a coroutine scope".
The Choosing Test Rule Vs Runtest Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 158,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/choosing-test-rule-vs-runtest curl -L https://claudskills.com/skills/choosing-test-rule-vs-runtest/SKILL.md \ -o ~/.claude/skills/choosing-test-rule-vs-runtest/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/choosing-test-rule-vs-runtest/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/choosing-test-rule-vs-runtest/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\choosing-test-rule-vs-runtest\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
SKILL.md from the source repository to ~/.claude/skills/choosing-test-rule-vs-runtest/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Choosing Test Rule Vs Runtest is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{choosing-test-rule-vs-runtest-2026,
author = {skydoves},
title = {Choosing Test Rule Vs Runtest [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/choosing-test-rule-vs-runtest/}
}Grade A · scanned 2026-07-23 — free static scan against the OWASP Agentic Skills Top 10.
The scan flagged 1 of 10 categories (filesystem), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.
Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:
Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore
SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.