116 lines
3.6 KiB
TypeScript
116 lines
3.6 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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catalogKeys,
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FORMAT_FALLBACK,
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formatDate,
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formatList,
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formatMessage,
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formatNumber,
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formatRelativeTime,
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localeDirection,
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messagePlaceholders,
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normalizeLocale,
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resolveMessage,
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selectMessage,
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selectPlural,
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} from "../../src/presentation/i18n/index.js";
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import {
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EN_MESSAGES,
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KO_MESSAGES,
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MESSAGE_CATALOGS,
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} from "../../src/presentation/i18n/catalog.js";
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describe("internationalization message contract", () => {
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it("keeps every registered catalog and interpolation contract in parity", () => {
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expect(catalogKeys("en-US")).toEqual(catalogKeys("ko-KR"));
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expect(catalogKeys("ar-EG")).toEqual(catalogKeys("ko-KR"));
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for (const key of catalogKeys("ko-KR")) {
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expect(messagePlaceholders(EN_MESSAGES[key])).toEqual(
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messagePlaceholders(KO_MESSAGES[key]),
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);
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}
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expect(MESSAGE_CATALOGS["ar-EG"]).toBe(EN_MESSAGES);
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});
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it("formats typed parameters and expands the pseudo locale", () => {
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expect(
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formatMessage("en-US", "route.documentTitle", {
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title: "Settings",
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appName: "Skeleton",
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}),
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).toBe("Settings · Skeleton");
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const pseudo = formatMessage("en-XA", "action.closeNamed", {
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title: "Account",
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});
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expect(pseudo).toMatch(/^［.+ ···］$/);
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expect(pseudo.length).toBeGreaterThan("Close Account".length);
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});
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it("falls back safely for unknown locale, key and missing interpolation", () => {
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expect(normalizeLocale("fr-FR")).toBe("ko-KR");
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expect(resolveMessage("fr-FR", "action.retry")).toBe("다시 시도");
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expect(resolveMessage("en-US", "action.login")).toBe("Sign in");
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expect(resolveMessage("en-US", "backend.stack.trace")).toBe(
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"요청한 문구를 표시할 수 없습니다.",
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);
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expect(resolveMessage("en-US", "action.closeNamed")).toBe(
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"요청한 문구를 표시할 수 없습니다.",
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);
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expect(resolveMessage("en-US", "backend.stack.trace")).not.toContain(
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"backend.stack.trace",
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);
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});
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it("defines direction without inferring it in components", () => {
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expect(localeDirection("ko-KR")).toBe("ltr");
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expect(localeDirection("en-XA")).toBe("ltr");
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expect(localeDirection("ar-EG")).toBe("rtl");
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});
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});
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describe("internationalization formatter contract", () => {
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const instant = new Date("2026-07-26T23:30:00.000Z");
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it("uses an explicit UTC default and deterministic locale formatting", () => {
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expect(formatDate("en-US", instant, { dateStyle: "short" })).toBe(
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"7/26/26",
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);
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expect(
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formatDate("en-US", instant, {
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dateStyle: "short",
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timeZone: "Asia/Seoul",
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}),
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).toBe("7/27/26");
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expect(formatNumber("en-US", 1234.5)).toBe("1,234.5");
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expect(formatRelativeTime("en-US", -1, "day")).toBe("yesterday");
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expect(formatList("en-US", ["one", "two", "three"])).toBe(
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"one, two, and three",
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);
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expect(selectPlural("en-US", 1, { one: "item", other: "items" })).toBe(
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"item",
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);
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expect(
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selectPlural("en-US", 3, { one: "item", other: "items" }),
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).toBe("items");
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expect(
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selectMessage("pending", {
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ready: "Ready",
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pending: "Pending",
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other: "Unknown",
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}),
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).toBe("Pending");
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});
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it("does not throw or expose invalid formatter input", () => {
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expect(formatDate("en-US", Number.NaN)).toBe(FORMAT_FALLBACK);
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expect(formatNumber("en-US", Number.POSITIVE_INFINITY)).toBe(
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FORMAT_FALLBACK,
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);
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expect(
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formatDate("en-US", instant, { timeZone: "not/a-time-zone" }),
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).toBe(FORMAT_FALLBACK);
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});
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});
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