pokerogue/test/test-utils/mocks/mock-fetch.ts

export const MockFetch = (input, _init) => {
  const url = typeof input === "string" ? input : input.url;

  // biome-ignore lint/suspicious/noImplicitAnyLet: TODO
  let responseHandler;
  // biome-ignore lint/suspicious/noImplicitAnyLet: TODO
  let responseText;

  const handlers = {
    "account/info": { username: "greenlamp", lastSessionSlot: 0 },
    "savedata/session": {},
    "savedata/system": {},
    "savedata/updateall": "",
    "daily/rankingpagecount": { data: 0 },
    "game/titlestats": { playerCount: 0, battleCount: 5 },
    "daily/rankings": [],
  };

  for (const key of Object.keys(handlers)) {
    if (url.includes(key)) {
      responseHandler = async () => handlers[key];
      responseText = async () => (handlers[key] ? JSON.stringify(handlers[key]) : handlers[key]);
      break;
    }
  }

  const response: Partial<Response> = {
    ok: true,
    status: 200,
    json: responseHandler,
    text: responseText,
    headers: new Headers({}),
  };

  return Promise.resolve(response);
};