project-inter-server/testHelpers/fetchMockHelpers.ts

import { jest } from "@jest/globals";

/**
 * Function to update behavior of the global `fetch` function.
 * Note that the Passio GO API returns status code 200 for failed responses.
 * @param obj
 * @param status
 */
export function updateGlobalFetchMockJson(
  obj: any,
  status: number = 200
) {
  // @ts-ignore
  global.fetch = jest.fn(() => {
    return Promise.resolve({
      json: () => Promise.resolve(obj),
      status,
      ok: status.toString().startsWith("2"), // 200-level codes are OK
    })
  });
}

/**
 * Reset the global fetch function mock's JSON to return an empty object.
 * @param obj
 */
export function resetGlobalFetchMockJson() {
  updateGlobalFetchMockJson({});
}


export function updateGlobalFetchMockJsonToThrowSyntaxError() {
  // @ts-ignore
  global.fetch = jest.fn(() => {
    return Promise.resolve({
      json: () => Promise.reject(new SyntaxError("Unable to parse JSON")),
      status: 200,
      ok: true,
    })
  }) as jest.Mock;
}