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LibJS: Implement Intl.RelativeTimeFormat.prototype.resolvedOptions
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describe("correct behavior", () => {
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test("length is 0", () => {
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expect(Intl.RelativeTimeFormat.prototype.resolvedOptions).toHaveLength(0);
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});
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test("locale only contains relevant extension keys", () => {
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const en1 = new Intl.RelativeTimeFormat("en-u-ca-islamicc");
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expect(en1.resolvedOptions().locale).toBe("en");
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const en2 = new Intl.RelativeTimeFormat("en-u-nu-latn");
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expect(en2.resolvedOptions().locale).toBe("en-u-nu-latn");
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const en3 = new Intl.RelativeTimeFormat("en-u-ca-islamicc-nu-latn");
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expect(en3.resolvedOptions().locale).toBe("en-u-nu-latn");
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});
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test("numberingSystem may be set by option", () => {
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const en = new Intl.RelativeTimeFormat("en", { numberingSystem: "latn" });
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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const el = new Intl.RelativeTimeFormat("el", { numberingSystem: "latn" });
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expect(el.resolvedOptions().numberingSystem).toBe("latn");
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});
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test("numberingSystem may be set by locale extension", () => {
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const en = new Intl.RelativeTimeFormat("en-u-nu-latn");
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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const el = new Intl.RelativeTimeFormat("el-u-nu-latn");
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expect(el.resolvedOptions().numberingSystem).toBe("latn");
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});
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test("numberingSystem option overrides locale extension", () => {
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const el = new Intl.RelativeTimeFormat("el-u-nu-latn", { numberingSystem: "grek" });
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expect(el.resolvedOptions().numberingSystem).toBe("grek");
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});
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test("numberingSystem option limited to known 'nu' values", () => {
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["latn", "arab"].forEach(numberingSystem => {
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const en = new Intl.RelativeTimeFormat("en", { numberingSystem: numberingSystem });
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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});
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["latn", "arab"].forEach(numberingSystem => {
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const en = new Intl.RelativeTimeFormat(`en-u-nu-${numberingSystem}`);
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expect(en.resolvedOptions().numberingSystem).toBe("latn");
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});
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["latn", "grek"].forEach(numberingSystem => {
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const el = new Intl.RelativeTimeFormat("el", { numberingSystem: numberingSystem });
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expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
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});
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["latn", "grek"].forEach(numberingSystem => {
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const el = new Intl.RelativeTimeFormat(`el-u-nu-${numberingSystem}`);
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expect(el.resolvedOptions().numberingSystem).toBe(numberingSystem);
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});
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});
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test("style", () => {
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const en1 = new Intl.RelativeTimeFormat("en");
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expect(en1.resolvedOptions().style).toBe("long");
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["long", "short", "narrow"].forEach(style => {
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const en2 = new Intl.RelativeTimeFormat("en", { style: style });
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expect(en2.resolvedOptions().style).toBe(style);
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});
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});
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test("numeric", () => {
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const en1 = new Intl.RelativeTimeFormat("en");
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expect(en1.resolvedOptions().numeric).toBe("always");
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["always", "auto"].forEach(numeric => {
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const en2 = new Intl.RelativeTimeFormat("en", { numeric: numeric });
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expect(en2.resolvedOptions().numeric).toBe(numeric);
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});
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});
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});
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