chore(fastify): Add machine auth integration test

[wobsoriano]

Description

Adding complete machine auth (API keys, M2M, OAuth) integration tests to our SDKs:

• Next.js (ref)
• Astro (ref)
• Nuxt (ref)
• TanStack Start (ref)
• React Router (ref)
• Express (ref)
• Hono (ref)
• Fastify (this PR)

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Building	Preview	Apr 2, 2026 6:15pm

[changeset-bot]

⚠️ No Changeset found

Latest commit: cc83715

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commit: cc83715

[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request adds two changes to the Fastify integration: first, it exposes the instantiated Clerk client on the global window object in the Fastify-Vite template's main client file. Second, it introduces a new integration test file that defines machine authentication test scenarios for Fastify, including API key authentication, machine-to-machine authentication, and OAuth authentication routes. The test uses a Playwright suite with an Express proxy that forwards requests to the Fastify server.

Possibly related PRs

• chore(nuxt): Add Nuxt machine auth integration test #8215: Adds identical machine authentication Playwright integration tests (MachineAuthTestAdapter with API key, M2M, and OAuth test scenarios) for the Nuxt framework.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding machine authentication integration tests for Fastify. It is concise, clear, and directly reflects the primary purpose of the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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