import { describe, expect, it, vi } from "vitest";

vi.mock("next/headers", () => ({
    cookies: vi.fn(),
}));

import { cookies } from "next/headers";
import { getLocale } from "@/lib/i18n/get-locale";

describe("getLocale", () => {
    it("returns the cookie locale when valid", async () => {
        vi.mocked(cookies).mockResolvedValue({ get: () => ({ value: "de" }) } as never);
        await expect(getLocale()).resolves.toBe("de");
    });

    it("falls back to default without a cookie", async () => {
        vi.mocked(cookies).mockResolvedValue({ get: () => undefined } as never);
        await expect(getLocale()).resolves.toBe("tr");
    });

    it("falls back on unknown values", async () => {
        vi.mocked(cookies).mockResolvedValue({ get: () => ({ value: "fr" }) } as never);
        await expect(getLocale()).resolves.toBe("tr");
    });
});