public function testStateHelpersAreCorrect()
 {
     DynamicModel::clearDynamicMethods();
     $machine = with(new StateMachine('DynamicModel'))->setStateAttributeName('status');
     $machine->addState('stopped');
     $machine->addState('running');
     $obj = new DynamicModel();
     $obj->status = 'stopped';
     $this->assertTrue($obj->isStopped());
     $this->assertFalse($obj->isRunning());
     $obj->status = 'running';
     $this->assertFalse($obj->isStopped());
     $this->assertTrue($obj->isRunning());
 }