Devise\Support\Sortable\Sort::link PHP Method

    public function link($field, $label = null, $options = array())
    {
        $Link = new Link($this->Framework, $field, $label, $options, $this->defaultOrderBy);
        return $Link->getLink($this->Manager->getStack());
    }

 public function test_it_gets_a_link()
 {
     $Manager = m::mock('Devise\\Support\\Sortable\\Manager');
     $Manager->shouldReceive('getStack')->times(1)->andReturn([]);
     $Framework = new \Devise\Support\Framework();
     $Sort = new Sort($Manager, $Framework);
     assertEquals('<a href="http://localhost?dir=asc&orderBy=someField" class="page-sort">SomeField</a> ', $Sort->link('someField'));
 }