public function testCanSortValues()
{
$under = Arr::sort([5, 3, 1, 2, 4], null, 'desc');
$this->assertEquals([5, 4, 3, 2, 1], $under);
$under = Arr::sort(range(1, 5), function ($value) {
return $value % 2 === 0;
});
$this->assertEquals([1, 3, 5, 2, 4], $under);
}