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test: update test262#20841

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alexander-akait merged 1 commit intomainfrom
chore-update-test262
Apr 14, 2026
Merged

test: update test262#20841
alexander-akait merged 1 commit intomainfrom
chore-update-test262

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Summary

test - update 262, these tests are not supported by V8 currently

What kind of change does this PR introduce?

test

Did you add tests for your changes?

Yes

Does this PR introduce a breaking change?

No

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Nothing

Use of AI

No

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Types Coverage

Coverage after merging chore-update-test262 into main will be
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github-actions Bot commented Apr 14, 2026

This PR is packaged and the instant preview is available (a553f61).

Install it locally:

  • npm
npm i -D webpack@https://pkg.pr.new/webpack@a553f61
  • yarn
yarn add -D webpack@https://pkg.pr.new/webpack@a553f61
  • pnpm
pnpm add -D webpack@https://pkg.pr.new/webpack@a553f61

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codecov Bot commented Apr 14, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.43%. Comparing base (485d4ce) to head (a9a0f7c).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff           @@
##             main   #20841   +/-   ##
=======================================
  Coverage   91.43%   91.43%           
=======================================
  Files         562      562           
  Lines       55438    55438           
  Branches    14636    14636           
=======================================
  Hits        50688    50688           
  Misses       4750     4750           
Flag Coverage Δ
integration 90.39% <ø> (ø)
test262 45.94% <ø> (ø)
unit 36.25% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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@alexander-akait alexander-akait marked this pull request as ready for review April 14, 2026 15:58
Copilot AI review requested due to automatic review settings April 14, 2026 15:58
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changeset-bot Bot commented Apr 14, 2026

⚠️ No Changeset found

Latest commit: a9a0f7c

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

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

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Pull request overview

Updates the local Test262 spec test runner configuration to account for newly added/updated upstream Test262 cases that currently fail under V8/this harness.

Changes:

  • Add module-code/namespace/internals/super-access-to-tdz-binding.js to the knownV8Bugs allowlist (ignored when it errors).
  • Add three import/import-defer/evaluation-triggers/*super-property-set-exported*.js cases to the knownBugs skip list.

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codspeed-hq Bot commented Apr 14, 2026

Merging this PR will degrade performance by 21.18%

⚡ 2 improved benchmarks
❌ 1 regressed benchmark
✅ 123 untouched benchmarks
⏩ 18 skipped benchmarks1

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Memory benchmark "lodash", scenario '{"name":"mode-development","mode":"development"}' 5.3 MB 4.1 MB +29.14%
Memory benchmark "many-modules-commonjs", scenario '{"name":"mode-production","mode":"production"}' 7 MB 8.9 MB -21.18%
Memory benchmark "css-modules", scenario '{"name":"mode-production","mode":"production"}' 9.7 MB 7.6 MB +27.14%

Comparing chore-update-test262 (a9a0f7c) with main (485d4ce)

Open in CodSpeed

Footnotes

  1. 18 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

@alexander-akait alexander-akait merged commit a553f61 into main Apr 14, 2026
53 of 62 checks passed
@alexander-akait alexander-akait deleted the chore-update-test262 branch April 14, 2026 16:43
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