Controlling The Test Clock

Q: What is a Claude Code skill and how does the Controlling The Test Clock skill fit in?

A Claude Code skill is a 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. Controlling The Test Clock is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: testing · Last updated: 2026-05-28

Use this skill to drive the Compose test clock by hand with MainTestClock — currentTime, autoAdvance, advanceTimeByFrame, advanceTimeBy(milliseconds, ignoreFrameDuration), and advanceTimeUntil. Explains the 16 ms frame delay used by TestMonotonicFrameClock, the per-frame ordering where withFrameNanos awaiters resume before recomposition, and how the recomposer and MainTestClock share one TestCoroutineScheduler. Covers v1 versus v2 entry-point dispatcher differences (UnconfinedTestDispatcher vs StandardTestDispatcher) and when an explicit runCurrent or advanceTimeBy(0) is required after migration. If the user mentions MainTestClock, mainClock.advanceTimeBy, mainClock.advanceTimeByFrame, mainClock.advanceTimeUntil, ComposeTimeoutException, frame delay, TestCoroutineScheduler, "test clock vs wall clock", or "v2 createComposeRule queues tasks", use this skill.

About this skill (catalog notes)

Controlling The Test Clock includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); a dedicated installation section; 12 code blocks for direct copy-paste. At roughly 1,828 words the SKILL.md is on the longer end of the catalog distribution.

License: Apache-2.0
Original author: skydoves
Indexed lastmod: 2026-05-28
Catalog position: Engineering · testing
Indexed related skills: 10

How Controlling The Test Clock fits the catalog

Controlling The Test Clock sits in the Engineering category under the testing sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

MainTestClock is the only knob that drives recomposition, animations, and LaunchedEffects in a Compose test. This skill explains its surface, the 16 ms frame model behind it, and how autoAdvance flips the test from "framework drives the clock" to "the test drives the clock". The animation recipe and the idle/wait recipe live in sibling skills — this one establishes the mechanics they both depend on.

What this skill does

Controlling The Test Clock 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/controlling-the-test-clock/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Controlling The Test Clock 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 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/controlling-the-test-clock
curl -L https://claudskills.com/skills/controlling-the-test-clock/SKILL.md \
  -o ~/.claude/skills/controlling-the-test-clock/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/controlling-the-test-clock/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/controlling-the-test-clock/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\controlling-the-test-clock\SKILL.md on Windows. See the full install guide for step-by-step instructions.

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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 →

Pro

One-click install via the desktop app

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.

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Frequently asked questions

How do I install the Controlling The Test Clock Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/controlling-the-test-clock/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Controlling The Test Clock skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Controlling The Test Clock skill?

Use Controlling The Test Clock when your Claude Code task falls under the Engineering category — specifically in the testing area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Controlling The Test Clock" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Controlling The Test Clock skill fit in?

A Claude Code skill is a 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. Controlling The Test Clock 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/.

Attribution & license

Source: https://github.com/skydoves/android-testing-skills/blob/HEAD/compose/synchronization/controlling-the-test-clock/SKILL.md
License: Apache-2.0
Author: skydoves

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

skydoves. (2026). Controlling The Test Clock [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/controlling-the-test-clock/

BibTeX

@misc{controlling-the-test-clock-2026,
  author    = {skydoves},
  title     = {Controlling The Test Clock [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/controlling-the-test-clock/}
}

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