Testing State Restoration

Q: What is a Claude Code skill and how does the Testing State Restoration 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. Testing State Restoration 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 test `rememberSaveable` round-trips with `StateRestorationTester`, the only supported tool for proving Compose state survives process death and configuration change. Covers the constructor (`StateRestorationTester(rule: ComposeContentTestRule)`), why `restorationTester.setContent { }` MUST replace `rule.setContent { }`, the `state = null` between phases trick that proves restoration actually happened, the 1 MB Bundle cap, and what is NOT exercised (Activity lifecycle, configuration changes, plain `remember`). Use when the developer asks "how do I test rememberSaveable", "test state survives rotation", "state is lost after restore", "Bundle exceeds maximum size", or shows a test that re-reads the same state reference after `emulateSavedInstanceStateRestore` and is confused why nothing changed.

About this skill (catalog notes)

Testing State Restoration includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); a dedicated installation section; 10 code blocks for direct copy-paste. The SKILL.md runs to about 1,457 words, in the catalog's typical mid-range.

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

How Testing State Restoration fits the catalog

Testing State Restoration 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

StateRestorationTester is the only first-party way to verify that a Composable's state survives a save/restore cycle. It is narrow — it injects a LocalSaveableStateRegistry, snapshots whatever registered through it, throws away the composition, and re-composes with the snapshot restored. It does not restart the Activity, it does not trigger Application.onCreate, and it has a hard 1 MB cap on the serialized Bundle. Misunderstanding the scope produces tests that look passing but prove nothing.

What this skill does

Testing State Restoration 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/testing-state-restoration/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the developer asks "how do I test rememberSaveable", "test state survives rotation", "state is lost after restore", "Bundle exceeds maximum size", or shows a test that re-reads the same state reference after `emulateSavedInstanceStateRestore` and is confused why nothing changed.

Who uses this skill

The Testing State Restoration 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/testing-state-restoration
curl -L https://claudskills.com/skills/testing-state-restoration/SKILL.md \
  -o ~/.claude/skills/testing-state-restoration/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/testing-state-restoration/. Claude Code auto-discovers it on next session.

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

📱 Install from your phone or desktop Telegram

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.

Pro

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See pricing → Download desktop app

Frequently asked questions

How do I install the Testing State Restoration Claude Code skill?

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

What does the Testing State Restoration 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 Testing State Restoration skill?

Use Testing State Restoration 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 Testing State Restoration" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Testing State Restoration 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. Testing State Restoration 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/patterns/testing-state-restoration/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). Testing State Restoration [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/testing-state-restoration/

BibTeX

@misc{testing-state-restoration-2026,
  author    = {skydoves},
  title     = {Testing State Restoration [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/testing-state-restoration/}
}

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