How to use the ember-power-calendar/test-support.calendarSelect function in ember-power-calendar

registerAsyncHelper('calendarSelect', async function(app, selector, selected) {
    return calendarSelect(selector, selected);
  });
}

async value(dateOrMoments) {
      assert(
        'selectDates expects an array of date or moment objects as frist argument',
        isArray(dateOrMoments) && dateOrMoments.every((dateOrMoment) => dateOrMoment instanceof Date || moment.isMoment(dateOrMoment))
      )

      for (let i = 0; i < dateOrMoments.length; i++) {
        let dateOrMoment = dateOrMoments[i];
        let date = moment.isMoment(dateOrMoment) ? dateOrMoment.toDate() : dateOrMoment;
        await calendarSelect(selector, date);
      }
    }
  };

registerAsyncHelper('datepickerSelect', async function(app, selector, selected) {
    assert('`datepickerSelect` expect a Date or MomentJS object as second argument', selected);
    let $selector = find(selector);
    assert('`datepickerSelect` couln\'t find any element with selector: ' + selector, $selector.length);
    let $trigger;
    if ($selector.hasClass('ember-power-datepicker-trigger')) {
      $trigger = $selector;
    } else {
      $trigger = find(`${selector} .ember-power-datepicker-trigger`);
      assert('`datepickerSelect` couln\'t find any datepicker within the selector ' + selector, $trigger.length);
      selector = `${selector} .ember-power-datepicker-trigger`;
    }

    await clickTrigger(selector);
    await calendarSelect('.ember-power-datepicker-content', selected);
  });
}