/**
* @test
* @covers Cocur\Slugify\Bridge\Twig\SlugifyExtension::slugifyFilter()
*/
public function slugifyFilter()
{
$this->slugify->shouldReceive('slugify')->with('hällo wörld', '_')->once()->andReturn('haello_woerld');
$this->assertEquals('haello_woerld', $this->extension->slugifyFilter('hällo wörld', '_'));
}