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Ledger Wallet Testing Skill · ledgerhq | DecimalAI

testingby ledgerhq

Ledger Wallet Testing Skill

ledgerhq/testing

Source ledgerhq/ledger-live ↗License MIT

Write unit and integration tests for Ledger Wallet apps.

SkillScore95Maintained

Automatic

QA & Test Engineering pack

Last verified 8/16/2026

What it changes

Passed 21 of 22 test cases with the skill, and 8 of 22 without it.

Without skill36%

With skill95%

Checks it passed that the model alone missed

Imports MSW server from tests/server
Imports MSW server from __tests__/server.ts
Imports render utilities from tests/testSetup

and 18 more in the full report

13 fixed8 passed either way1 still failing0 broke

Pass-rate lift: +59 pp
Tokens: +41%
Agent turns: 0%
Response time: -41%

Model gemini-3.6-flashMeasured 8/16/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ledgerhq-testing/SKILL.md https://app.decimal.ai/s/ledgerhq-testing/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ledgerhq-testing, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ledgerhq-testing/ and pins it in .decimal/skills.lock

decimalai skills add ledgerhq-testing

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ledgerhq-testing/SKILL.md https://app.decimal.ai/s/ledgerhq-testing/SKILL.md

Raw file: /s/ledgerhq-testing/SKILL.md ↗ · machine-readable summary at /s/ledgerhq-testing.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 13

Prompt

Write the import statements for a desktop component test needing MSW server mocks and React Testing Library utilities.

What was checked, without and with the skill
Checked	Without skill	With skill
Imports render utilities from tests/testSetup	Missed	Passed
Imports MSW server from tests/server	Missed	Passed

case-17 · gemini-3.6-flash · 8/16/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md189 linessingle file

Ledger Wallet Testing Skill

Jest + MSW + React Testing Library (Desktop) / React Native Testing Library (Mobile) ❌ E2E tests → Use e2e skill

Golden Rules

toBeVisible() over toBeInTheDocument() — Always. toBeInTheDocument only checks DOM presence; elements can be hidden. Use toBeInTheDocument only when testing explicitly hidden elements.
Search before you create — Before writing any mock, fixture, or helper, rg the codebase. If it exists, import it. If your new mock is reusable (2+ files), put it in a shared location.
Mock external deps only — Never mock child components. Test integration.
One behavior per test — Name: it("should <behavior> when <condition>").
Query priority: getByRole > getByLabelText > getByText > getByTestId (last resort).
Feature flags via store, never mocked — Use overriddenFeatureFlags in initialState.settings.
Use existing factories — genAccount() from @ledgerhq/ledger-wallet-framework/mocks/account, getCryptoCurrencyById() from @ledgerhq/live-common/currencies. Never recreate account/currency data from scratch.

Quick Reference

pnpm test:jest "filename"    # Run specific file
pnpm test:jest               # Run all tests
pnpm test:jest --coverage    # Coverage report

# Coin modules (libs/coin-modules)
pnpm coin:<name> test              # Unit tests
pnpm coin:<name> test "filename"   # Specific file
pnpm coin:<name> test-integ        # Integration tests (slow)

Platform	Render Import	MSW Server
Desktop	`tests/testSetup`	`tests/server.ts`
Mobile	`@tests/test-renderer`	`__tests__/server.ts`

Test Template

Track record

Benchmark

21 / 22

test cases passed, vs 8 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ledgerhq / ledger-live

.agents/skills/testing/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

Ledger Wallet Testing Skill

Golden Rules

Quick Reference

Test Template

Track record

Benchmark

Adoption

SkillSafety

Source

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