import { afterEach, describe, expect, it, vi } from "vitest";
import { fetchJson } from "@/lib/client-fetch";

afterEach(() => {
    vi.unstubAllGlobals();
});

describe("fetchJson", () => {
    it("returns parsed JSON on success", async () => {
        vi.stubGlobal(
            "fetch",
            vi.fn(async () => ({ ok: true, json: async () => ({ a: 1 }) }) as Response),
        );
        await expect(fetchJson<{ a: number }>("https://example.com")).resolves.toEqual({ a: 1 });
    });

    it("returns null on HTTP error", async () => {
        vi.stubGlobal(
            "fetch",
            vi.fn(async () => ({ ok: false, status: 500 }) as Response),
        );
        await expect(fetchJson("https://example.com")).resolves.toBeNull();
    });

    it("returns null on network failure", async () => {
        vi.stubGlobal(
            "fetch",
            vi.fn(async () => {
                throw new Error("down");
            }),
        );
        await expect(fetchJson("https://example.com")).resolves.toBeNull();
    });
});