testing

Testing guidance for an AdonisJS application using Japa, with separate unit tests and functional tests. Functional tests call HTTP endpoints against a real PostgreSQL database, while unit tests replace dependencies with test doubles.

In plain words
What is it for?
It is for writing and reviewing unit or endpoint tests, setting up database transactions, and faking mail, file storage, events, and server-sent events.
Why use it?
It shows how to match existing test patterns and prevents tests from sending mail, writing to storage, emitting real events, or reaching external services.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/filipebraida/adonisjs-starter-kit/testing
Any agent
npx skills add filipebraida/adonisjs-starter-kit --skill testing
Clone the repo
git clone --depth 1 https://github.com/filipebraida/adonisjs-starter-kit

Made for: Claude Code, Codex.

Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,158 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00082 $0.02158
Opus 5 $0.00041 $0.01079
Sonnet 5 $0.00016 $0.00432
Haiku 4.5 $0.00008 $0.00216

Measured 3d ago against content hash 3a93cb60ed27, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 3d 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.

packages/skills/testing/SKILL.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Testing

Two suites: unit for action/service internals with dependencies stubbed; functional for HTTP endpoints hit against a real Postgres wrapped in a per-test transaction. Every spec matches the shape of the nearest existing spec — same imports, same setup/teardown order, same helpers. Anything that reaches out (mail, drive, emitter, transmit, third-party HTTP) must be faked; a global mail fake in tests/bootstrap.ts is a safety net so a forgotten setup doesn't send a real email.

Mandatory fakes by dependency

Every side-effect dependency needs an explicit fake so no test reaches real infra:

Dependency How to fake Scope
Mail mail.fake() Global in tests/bootstrap.ts + per-test when asserting
Drive drive.fake(env.get('DRIVE_DISK') ?? 'fs') Per-group setup + teardown
Emitter emitter.fake(['event:name'])EventsBuffer Per-test opt-in
Transmit (SSE) transport: null in config/transmit.ts (default) Global

emitter.fake takes an array of event names — a bare string is a TypeScript error:

const events = emitter.fake(['user:registered']) // ✅
// emitter.fake('user:registered')               // ❌ wrong type

Rules

  • Location: app/<mod>/tests/{unit,functional}/*.spec.ts.
  • Group setup: every group opens with group.each.setup(() => testUtils.db().wrapInGlobalTransaction()) when the code under test touches DB (nearly always).
  • RBAC helpers: functional specs involving roles/permissions call group.each.setup(() => ensureBaseRoles()); assign per user with withRole(user, ROLES.X) / withPermissions(user, [...]).
  • Emitter fake: to isolate an endpoint from its listeners, const fake = emitter.fake(['event:name']) in setup + emitter.restore() in teardown. Assert with fake.assertEmitted('event:name') / fake.assertNoneEmitted().
  • Mail fake: const mails = mail.fake() in the test, then mails.assertSent(Notification, (msg) => ...) or mails.assertNoneSent().
  • Drive fake: drive.fake(...) in group setup, drive.restore(...) in teardown. Assert with disk.assertExists(path), disk.assertMissing(path).
  • Sinon for stubbing services, drivers, and single functions in unit tests: sinon.stub<[Arg], Promise<Ret>>().resolves(...). Always group.each.teardown(() => sinon.restore()).
  • Factories over fixtures — use UserFactory.create() / UserFactory.merge({...}).create() instead of hand-building rows.
  • CSRF: POST/PUT/DELETE must include .withCsrfToken() — shield middleware is enforced.
  • Auth: use .loginAs(user) on the request builder — sets the session cookie for that user's guard.
  • JSON vs HTML: chain .accept('json') when asserting a JSON response body, .withInertia() for Inertia flows so the exception handler treats the request as UI.
  • DB assertions: db.assertHas('table', { column: value }), db.assertMissing('table', { ... }) — plugin from @adonisjs/lucid/plugins/db.

Read the full file on GitHub · 185 lines

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. 3d ago First seen · 185 lines · 82 tokens per session scan A 3a93cb60ed27

Subscribe to this mod's changes

testing is a skill published in the GitHub repository filipebraida/adonisjs-starter-kit (94 stars, last pushed 23d ago), licensed MIT. It adds 82 tokens to every session and 2,158 once invoked, about $0.0004 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 2026-08-30.

Related

Other skills, from other repositories

pest-testing

Tests applications using the Pest 4 PHP framework. Activates when writing tests, creating unit or feature tests, adding assertions, testing Livewire components, browser testing, debugging test failures, working with datasets or mocking; or when the user mentions test, spec, TDD, expects, assertion, coverage, or needs…

spatie/freek.dev · 72 tokens

testing-patterns

Testing patterns and principles. Unit, integration, mocking strategies.

vudovn/ag-kit · 16 tokens

testing

Writing or debugging tests, choosing unit vs integration style, Postgres/ClickHouse tests, regenerating ClickHouse test schema, or exporting test helpers from packages without pulling test code into production bundles.

latitude-dev/latitude-llm · 41 tokens

detect-flaky-tests

Detects flaky Go tests by analyzing GitHub Actions workflow runs across the last 7 days and all PRs — covering both the run-tests job (unit/integration) and the e2e-test job (gVisor and microVM lanes). For each newly-detected flaky test or infra issue, opens a GitHub issue with full evidence and a draft fix PR. Does…

agent-substrate/substrate · 102 tokens

designing-tests

Designs and implements testing strategies for any codebase. Use when adding tests, improving coverage, setting up testing infrastructure, debugging test failures, or when asked about unit tests, integration tests, or E2E testing.

CloudAI-X/claude-workflow-v2 · 48 tokens

test

Run tests. Use after code changes to validate. Arguments: unit (default, no GPU), e2e (with models), filter name, or all.

soniqo/speech-swift · 34 tokens