I have an API request that returns some tokens I need for most requests. I’ve placed a function in a setupFiles, and declared a variable using global.varName. I attempt to use the variable in a beforeEach() hook. But when I run Jest, before loading context, or executing the file in setupFiles, I get an error that the variable is not a function.

Background – This is an old MVC app, all data is embedded in html. I am using Cheerio library for easier parsing.

Note: I have abstracted fetch http handler for re-usability, omitting that code.

jest.config.cjs

const jestConfig = {
  testMatch: ['**/tests/*.cjs'],
  setupFiles: ['./tests/lib/auth.cjs'],
  globals: {
    baseUrl: 'https://someUrl.com/',
  }
};

module.exports = jestConfig;

relevant function in auth.cjs

async function getReqVerificationValues() {
  const getCreateScriptScreen = await get(
    'someUri'
  );
  expect(getCreateScriptScreen.status).toBe(200);
  const getCreateScriptScreenText = await getCreateScriptScreen.text();
  global.createScriptDom = cheerio.load(getCreateScriptScreenText);
}

module.exports = { getReqVerificationValues };

Relevant section of scripts.test.cjs:

beforeEach(() => {
  const prescriberIdList = global
    .createScriptDom('[id=PrescriberId]')
    .children()
    .match(/(?<=option value=")(?!s*$).+(?=")/g);
});

Error Message:
TypeError: global.createScriptDom is not a function