How to use the single-spa.checkActivityFunctions function in single-spa

HTMLHeadElement.prototype.appendChild = function appendChild(this: any, newChild: T) {
    const element = newChild as any;
    if (element.tagName) {
      switch (element.tagName) {
        case LINK_TAG_NAME:
        case STYLE_TAG_NAME: {
          const stylesheetElement: HTMLLinkElement | HTMLStyleElement = newChild as any;

          // check if the currently specified application is active
          // While we switch page from qiankun app to a normal react routing page, the normal one may load stylesheet dynamically while page rendering,
          // but the url change listener must to wait until the current call stack is flushed.
          // This scenario may cause we record the stylesheet from react routing page dynamic injection,
          // and remove them after the url change triggered and qiankun app is unmouting
          // see https://github.com/ReactTraining/history/blob/master/modules/createHashHistory.js#L222-L230
          const activated = checkActivityFunctions(window.location).some(name => name === appName);
          // only hijack dynamic style injection when app activated
          if (activated) {
            dynamicStyleSheetElements.push(stylesheetElement);
          }

          break;
        }

        case SCRIPT_TAG_NAME: {
          const { src, text } = element as HTMLScriptElement;

          if (src) {
            execScripts(null, [src], proxy).then(
              () => {
                // we need to invoke the onload event manually to notify the event listener that the script was completed
                // here are the two typical ways of dynamic script loading

it(`returns both when the locationContains both`, () => {
    const wLocation = mockWindowLocation('something.com/two/one')
    expect(singleSpa.checkActivityFunctions(wLocation)).toEqual(['test1', 'test2'])
  })
})