Use vitest#expect from the local context

[vicb]

Part of #12346

This PR handles bucket 2 out of 2 of the vite package to keep its size reasonable.
Only trivial cases are handled.
More complex cases will be handled as a follow-up and only disable the ESLint rule for now.

The code was created by OpenNext/Opus:

vite-plugin-cloudflare — Bucket 2 (Final) Summary

Scope

Bucket 2: playground/[n-z]* + src/__tests__/ — 51 files importing expect from vitest

This completes the vite-plugin-cloudflare migration. All test files in the package are now covered by the no-vitest-import-expect rule.

ESLint Configuration (eslint.config.mjs)

Changes

Merged the bucket 1 pattern (playground/[a-m]*/**/__tests__/**/*.ts) with the new bucket into a single config block:

The e2e config block remains separate (it has its own languageOptions and standalone plugins registration since e2e files are excluded from the shared config).

Migration Results

Category	Files	Details
Trivial playground (converted)	40	All playground/[n-z]* spec + base-tests files
Trivial src (converted)	8	7 straightforward + 1 with expect passed via closure (resolve-plugin-config)
Complex (lint disable)	2	websockets (helper fn) + get-validated-wrangler-config-path (.forEach)
No changes needed	7	Files that don't import expect from vitest
Total files in scope	57

Converted to complex, then further fixed (1 file)

playground/websockets/__tests__/websockets.spec.ts — initially marked complex due to expect used in the module-scope openWebSocket() helper. Resolved by adding an expect: ExpectStatic parameter to openWebSocket() and passing it from each test's context. No eslint-disable needed.

Verification

• Lint: pnpm --filter @cloudflare/vite-plugin check:lint — passes (0 warnings)
• Types: pnpm --filter @cloudflare/vite-plugin check:type — passes
• Unit tests: pnpm --filter @cloudflare/vite-plugin test:ci — 10 files, 66 tests, all passing

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: not user facing

A picture of a cute animal (not mandatory, but encouraged)

---

[changeset-bot]

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Latest commit: 9e1a6c4

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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[pkg-pr-new]

create-cloudflare

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@cloudflare/kv-asset-handler

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miniflare

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@cloudflare/pages-shared

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@cloudflare/unenv-preset

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@cloudflare/vite-plugin

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@cloudflare/vitest-pool-workers

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@cloudflare/workers-editor-shared

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@cloudflare/workers-utils

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wrangler

npm i https://pkg.pr.new/wrangler@12452

commit: 9e1a6c4