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Add more tests for Intl.Locale.prototype.getNumberingSystems#5022

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anba wants to merge 1 commit intotc39:mainfrom
anba:locale-num-sys
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Add more tests for Intl.Locale.prototype.getNumberingSystems#5022
anba wants to merge 1 commit intotc39:mainfrom
anba:locale-num-sys

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@anba anba commented Apr 13, 2026

Add coverage for:

  • Language subtag has more than three letters.
  • Lookup locale uses prefix matching.
  • Unicode extension is present.
  • Unicode extension is empty or the string "true".
  • "latn" is returned for an unsupported locale.

Also update existing tests and test meta data to match current spec text.

Add coverage for:
- Language subtag has more than three letters.
- Lookup locale uses prefix matching.
- Unicode extension is present.
- Unicode extension is empty or the string "true".
- "latn" is returned for an unsupported locale.

Also update existing tests and test meta data to match current spec text.
@anba anba requested a review from a team as a code owner April 13, 2026 08:16
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anba commented Apr 13, 2026

  • preferred-from-unicode-extension-true-empty.js fails in JSC and V8 because of an ICU4C-related issue.
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