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LibJS: Extend Intl.DisplayNames.of to support language tags
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@ -77,6 +77,7 @@ JS_DEFINE_NATIVE_FUNCTION(DisplayNamesPrototype::of)
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switch (display_names->type()) {
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case DisplayNames::Type::Language:
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result = Unicode::get_locale_language_mapping(display_names->locale(), code.as_string().string());
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break;
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case DisplayNames::Type::Region:
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result = Unicode::get_locale_territory_mapping(display_names->locale(), code.as_string().string());
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@ -29,6 +29,21 @@ describe("correct behavior", () => {
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expect(Intl.DisplayNames.prototype.of).toHaveLength(1);
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});
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test("option type language", () => {
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const en = new Intl.DisplayNames("en", { type: "language" });
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expect(en.of("en")).toBe("English");
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const es419 = new Intl.DisplayNames("es-419", { type: "language" });
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expect(es419.of("en")).toBe("inglés");
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const zhHant = new Intl.DisplayNames(["zh-Hant"], { type: "language" });
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expect(zhHant.of("en")).toBe("英文");
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expect(en.of("zz")).toBe("zz");
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expect(es419.of("zz")).toBe("zz");
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expect(zhHant.of("zz")).toBe("zz");
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});
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test("option type region", () => {
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const en = new Intl.DisplayNames("en", { type: "region" });
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expect(en.of("US")).toBe("United States");
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