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refactor(dev-server-legacy): migrate tests to node:test#3083

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migrate/dev-server-legacy-node-test
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refactor(dev-server-legacy): migrate tests to node:test#3083
bennypowers wants to merge 2 commits into
masterfrom
migrate/dev-server-legacy-node-test

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Summary

  • Migrate @web/dev-server-legacy tests from mocha/chai to node:test + node:assert/strict
  • First TypeScript test migration in the series
  • 2 TS test files, imports from dist/ (compiled output)
  • __dirname replaced with import.meta.dirname
  • Local .js import paths updated to .ts

Test plan

  • 20/20 tests pass on Node 22.22.3
  • ESLint clean
  • Prettier clean
  • Code review clean

Replace mocha globals and chai assertions with node:test and
node:assert/strict. First TypeScript test migration in the series.

- `import { expect } from 'chai'` -> `import assert from 'node:assert/strict'`
- Add `import { describe, it } from 'node:test'`
- `expect(x).to.equal(y)` -> `assert.equal(x, y)`
- `this.timeout(10000)` -> `{ timeout: 10000 }` option on describe
- `__dirname` -> `import.meta.dirname`
- `../src/legacyPlugin.js` -> `../dist/legacyPlugin.js`
- `./userAgents.js` -> `./userAgents.ts`
- Add `--test-force-exit` to prevent test hangs from open handles

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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changeset-bot Bot commented Jun 1, 2026

⚠️ No Changeset found

Latest commit: e091b77

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

CI sets NODE_OPTIONS='--no-experimental-strip-types' to support
un-migrated mocha+ts-node packages. The CLI flag overrides NODE_OPTIONS,
letting migrated .ts test files run with native type stripping.

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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