import { afterEach, beforeEach, expect, it, vi } from "vitest";
import { setToken } from "../src/api/client";
import { __resetImageCache, fetchObjectUrl } from "../src/lib/authImage";

beforeEach(() => {
  __resetImageCache();
  setToken("T");
  (URL as any).createObjectURL = vi.fn(() => "blob:gen");
});
afterEach(() => vi.unstubAllGlobals());

it("blob → objectURL;同 URL 只发一次请求", async () => {
  const f = vi.fn(async (_url: any, init: any) => {
    expect(init.headers.Authorization).toBe("Bearer T");
    return new Response(new Blob(["img"]), { status: 200 });
  });
  vi.stubGlobal("fetch", f);
  expect(await fetchObjectUrl("/api/books/1/cover?v=h")).toBe("blob:gen");
  expect(await fetchObjectUrl("/api/books/1/cover?v=h")).toBe("blob:gen");
  expect(f).toHaveBeenCalledTimes(1);
});

it("失败不入缓存,重试重新请求", async () => {
  let n = 0;
  vi.stubGlobal("fetch", async () => {
    n++;
    return n === 1 ? new Response("x", { status: 500 }) : new Response(new Blob(["img"]), { status: 200 });
  });
  await expect(fetchObjectUrl("/api/books/2/pages/0?v=h")).rejects.toThrow();
  expect(await fetchObjectUrl("/api/books/2/pages/0?v=h")).toBe("blob:gen");
  expect(n).toBe(2);
});