import { describe, it, expect, vi, afterEach } from "vitest";
import DownloadUtils from "@/js/DownloadUtils";

describe("DownloadUtils", () => {
    afterEach(() => {
        delete window.MeshChatXAndroid;
        vi.restoreAllMocks();
    });

    it("delegates base64 saves to Android bridge when present", () => {
        const saveDownload = vi.fn();
        window.MeshChatXAndroid = { saveDownload };
        DownloadUtils.downloadFromBase64("test.mu", "QUJD");
        expect(saveDownload).toHaveBeenCalledWith("test.mu", "QUJD");
    });

    it("downloadFile uses Android bridge when present", async () => {
        const saveDownload = vi.fn();
        window.MeshChatXAndroid = { saveDownload };
        const blob = new Blob([new Uint8Array([1, 2, 3])]);
        await DownloadUtils.downloadFile("f.bin", blob);
        expect(saveDownload).toHaveBeenCalledTimes(1);
        const [name, b64] = saveDownload.mock.calls[0];
        expect(name).toBe("f.bin");
        expect(typeof b64).toBe("string");
        expect(b64.length).toBeGreaterThan(0);
    });
});