Skip to content

test(rollup-plugin-html): migrate from mocha/chai to node:test#3097

Open
bennypowers wants to merge 2 commits into
masterfrom
migrate/rollup-plugin-html-node-test
Open

test(rollup-plugin-html): migrate from mocha/chai to node:test#3097
bennypowers wants to merge 2 commits into
masterfrom
migrate/rollup-plugin-html-node-test

Conversation

@bennypowers

Copy link
Copy Markdown
Member

Summary

  • Migrate all 9 test files (139 tests) from mocha/chai to node:test and node:assert/strict
  • Replace mocha test script with node --experimental-strip-types --test --test-force-exit
  • Change source imports (../src/) to dist imports (../dist/)
  • Use import type for type-only imports (TypeScript strip-types compatibility)
  • Replace __dirname with import.meta.dirname

Test plan

  • All 139 tests pass locally on Node 22.22.3
  • Lint passes (prettier formatted)
  • Full monorepo build succeeds
  • CI green

Replace mocha/chai with node:test and node:assert/strict across all 9
test files (139 tests). Update test script to use
node --experimental-strip-types --test. Change source imports to dist
imports and use import type for type-only imports.

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

changeset-bot Bot commented Jun 2, 2026

Copy link
Copy Markdown

⚠️ No Changeset found

Latest commit: 7f524d2

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

import { parse } from 'parse5';
import path from 'path';
import { extractAssets } from '../../../../src/input/extract/extractAssets.js';
import { extractAssets } from '../../../../dist/input/extract/extractAssets.js';

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

why do you import from dist now?
I saw you did similar change in other PRs, but not 100% clear why

Copy link
Copy Markdown
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

this requires TypeScript 5.7+ with rewriteRelativeImportExtensions: true. That lets source files use .ts extensions in imports. we determined in chat that this migration is not worth doing until after node 22 EOL

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

got it
then I think we need to run build always before tests, shouldn't this be part of the change too? or is that smth for the future PR when all PRs are complete?

"demo:spa": "rm -rf demo/dist && rollup -c demo/spa/rollup.config.js --watch & npm run serve-demo",
"serve-demo": "node ../dev-server/dist/bin.js --watch --root-dir demo/dist --app-index index.html --compatibility none --open",
"test:node": "mocha test/**/*.test.ts --require ts-node/register --reporter dot",
"test:watch": "mocha test/**/*.test.ts --require ts-node/register --watch --watch-files src,test"

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I saw you kept "watch" in other PRs, any specific reason to remove it here?

Copy link
Copy Markdown
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

will fix

Copy link
Copy Markdown
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

PTAL 7f524d2

expect(result).to.include("url('assets/image1.png')");
expect(result).to.include("url('assets/image2.png')");
assert.ok(result.includes("url('assets/image1.png')"));
assert.ok(result.includes("url('assets/image2.png')"));

@bashmish bashmish Jun 9, 2026

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

chai gives nice output in such case which

  • increased debugging locally
  • help understand what failed in the pipeline, especially if it's executed on Windows

I think this is very important and I'd prefer to have a better alternative to this

I quickly checked possibilities and asked copilot and this is the first idea to start this discussion: create a reusable helper like this and put it into test-utils/assert.js

function assertIncludes(actual, expected) {
  if (!actual.includes(expected)) {
    const preview = actual.length > 200
      ? actual.slice(0, 200) + '...'
      : actual;

    throw new assert.AssertionError({
      message:
        `Expected substring not found.\n\n` +
        `Expected:\n${expected}\n\n` +
        `Actual (preview):\n${preview}`,
      actual,
      expected,
      operator: 'includes'
    });
  }
}

Copy link
Copy Markdown
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

we already export expectIncludes and expectNotIncludes, i can refactor to use that

Copy link
Copy Markdown
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

PTAL 7f524d2

…ript

Replace assert.ok(x.includes(y)) with expectIncludes for better error
messages on failure. Add back test:watch script that was accidentally
removed during migration.

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants