LibJS: Compare Unicode locale variants using case-insensitive matching

In the IsStructurallyValidLanguageTag AO, we of course cannot assume the variants are canonicalized to lower-case yet, because canonicalization hasn't happened yet.
Author: https://github.com/trflynn89 Commit: 940c023e09 Pull-request: https://github.com/SerenityOS/serenity/pull/9749 Reviewed-by: https://github.com/linusg ✅
2025-09-07 01:56:38 +00:00 · 2021-09-01 18:54:30 -04:00 · 2021-09-01 18:54:30 -04:00 · 940c023e09 · 2024-07-18 04:53:26 +09:00
commit 940c023e09
parent fdedb3ab33
2 changed files with 8 additions and 1 deletions
--- a/Userland/Libraries/LibJS/Tests/builtins/Intl/Intl.getCanonicalLocales.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/Intl.getCanonicalLocales.js
@ -18,6 +18,13 @@ describe("errors", () => {
    });

    test("duplicate variant subtags", () => {
+        expect(() => {
+            Intl.getCanonicalLocales("en-posix-POSIX");
+        }).toThrowWithMessage(
+            RangeError,
+            "en-posix-POSIX is not a structurally valid language tag"
+        );
+
        expect(() => {
            Intl.getCanonicalLocales("en-POSIX-POSIX");
        }).toThrowWithMessage(