/**
  * @covers Phossa\Event\EventDispatcher::off
  */
 public function testOff()
 {
     $callable = function ($evt) {
         echo "START";
     };
     $this->object->many('start', 3, $callable);
     $this->object->on('end', $callable);
     $this->assertTrue($this->object->has('start'));
     $this->object->off('start');
     $this->assertFalse($this->object->has('start'));
     $this->assertTrue($this->object->has('end'));
     $this->object->off();
     $this->assertFalse($this->object->has('end'));
 }