function it_should_sort_on_multiple_attributes_asc()
{
$this->beConstructedWith(['firstName' => 'ASC', 'lastName' => 'ASC']);
$this->sort($this->toSort)->shouldHaveFirstValue('lastName', 'Feng');
$this->sort($this->toSort)->shouldHaveFirstValue('firstName', 'Amy');
$this->sort($this->collection->toArray())->shouldHaveFirstValue('lastName', 'Feng');
$this->sort($this->collection->toArray())->shouldHaveFirstValue('firstName', 'Amy');
}