How to make a unit test return value when finish? [duplicate]

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• How do I return the response from an asynchronous call? 15 answers

I'm having trouble returning a value (for the entire exported function not just one particular test) when all the unit tests in a file finishes. I'm currently using es6 javascript code and exporting my tests inside a function object. I'm hoping to use the "chainLink" as a resolvable promise

It should return "true" or some value after all the tests are done running so that I can later fire a callback.

Code Sample

export function chainLink(url, jsonUrl) {
  test.before(async t => {
    document = await loadedDocument(url);
    json = await loadedJson(jsonUrl);
  });

  test('body should not be empty', t => {
    const body = document.querySelector('body');
    t.true(body.innerHTML.length > 0);
  });

  test('article type is rendered', t => {
    const article = document.getElementsByTagName('article');
    t.true(article.length > 0);
  });

  // first attempt at returning a value // doesn't work
  test.after('finish stuff', t => {
    return; 
  });

};

A lot of unit testing framework include a ".after()" method that runs after all the other tests have finished. Placing a "return" or "return true" inside the ".after()" method doesn't result in any value returned.

Is it possible?