Files
fusion/packages/dashboard/app/components/__tests__/LanguageSelector.test.tsx
gsxdsm e08a5633fa feat(i18n): language reset-to-auto-detect + review nitpicks (#1352)
Resolves the remaining review threads:

- Reset to auto-detect across all three layers (Greptile): store passes
  language:null through as null-as-delete; dashboard gains an Auto option
  (clearLanguage + hasExplicitChoice in useLanguage, re-detects from
  navigator, syncs cross-tab); CLI accepts 'fn settings set language auto'.
  Catalog keys added for all five locales; tests at every layer.
- CLI i18n test singleton: afterEach locale restore so zh-CN/fr switches
  can't leak across cases (CodeRabbit nitpick)
- useLocaleFormat memoized per locale for stable formatter identities
  (CodeRabbit nitpick)
- settings-reference.md documents the auto reset path

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-03 13:02:23 -07:00

69 lines
2.4 KiB
TypeScript

import { SUPPORTED_LOCALES } from "@fusion/core";
import { fireEvent, render, screen } from "@testing-library/react";
import { beforeEach, describe, expect, it, vi } from "vitest";
import { useLanguage } from "../../hooks/useLanguage";
vi.mock("../../hooks/useLanguage", () => ({ useLanguage: vi.fn() }));
vi.mock("react-i18next", () => ({
useTranslation: () => ({ t: (key: string, def?: string) => def ?? key }),
}));
const { LanguageSelector } = await import("../LanguageSelector");
const mockUseLanguage = vi.mocked(useLanguage);
const setLanguage = vi.fn();
const clearLanguage = vi.fn();
describe("LanguageSelector", () => {
beforeEach(() => {
setLanguage.mockClear();
clearLanguage.mockClear();
mockUseLanguage.mockReturnValue({
language: "en",
supportedLocales: SUPPORTED_LOCALES,
setLanguage,
clearLanguage,
hasExplicitChoice: true,
});
});
it("renders all five language endonyms", () => {
render(<LanguageSelector />);
for (const name of ["English", "简体中文", "繁體中文", "Français", "Español"]) {
expect(screen.getByText(name)).toBeTruthy();
}
});
it("marks the active locale as pressed", () => {
render(<LanguageSelector />);
expect(screen.getByText("English").getAttribute("aria-pressed")).toBe("true");
expect(screen.getByText("Français").getAttribute("aria-pressed")).toBe("false");
});
it("calls setLanguage with the selected locale code", () => {
render(<LanguageSelector />);
fireEvent.click(screen.getByText("简体中文"));
expect(setLanguage).toHaveBeenCalledWith("zh-CN");
});
it("offers an Auto option that clears the explicit choice", () => {
render(<LanguageSelector />);
const auto = screen.getByText("Auto");
expect(auto.getAttribute("aria-pressed")).toBe("false");
fireEvent.click(auto);
expect(clearLanguage).toHaveBeenCalledTimes(1);
});
it("marks Auto as pressed (and no locale) when no explicit choice exists", () => {
mockUseLanguage.mockReturnValue({
language: "fr", // detected, not chosen
supportedLocales: SUPPORTED_LOCALES,
setLanguage,
clearLanguage,
hasExplicitChoice: false,
});
render(<LanguageSelector />);
expect(screen.getByText("Auto").getAttribute("aria-pressed")).toBe("true");
expect(screen.getByText("Français").getAttribute("aria-pressed")).toBe("false");
});
});