public function invokeWithoutCustomConfig()
{
$sm = $this->createServiceManagerMock();
$slugify = call_user_func($this->slugifyService, $sm);
$this->assertInstanceOf('Cocur\\Slugify\\Slugify', $slugify);
// Make sure reg exp is default one
$actual = 'Hello My Friend.zip';
$expected = 'hello-my-friend-zip';
$this->assertEquals($expected, $slugify->slugify($actual));
}