public function testStateChanges()
{
$item = new Item();
$this->assertInstanceOf(StateInit::class, $item->getState());
$this->assertInstanceOf(StateInit::class, $item->pause()->getState());
$this->assertInstanceOf(StateInit::class, $item->resume()->getState());
$this->assertInstanceOf(StateInit::class, $item->stop()->getState());
$this->assertInstanceOf(StateInit::class, $item->discard()->getState());
$this->assertInstanceOf(StateRunning::class, $item->start()->getState());
$this->assertInstanceOf(StateRunning::class, $item->start()->getState());
$this->assertInstanceOf(StateRunning::class, $item->resume()->getState());
$this->assertInstanceOf(StatePaused::class, $item->pause()->getState());
$this->assertInstanceOf(StatePaused::class, $item->pause()->getState());
$this->assertInstanceOf(StatePaused::class, $item->start()->getState());
$this->assertInstanceOf(StateStopped::class, $item->stop()->getState());
$this->assertInstanceOf(StateStopped::class, $item->start()->getState());
$this->assertInstanceOf(StateStopped::class, $item->pause()->getState());
$this->assertInstanceOf(StateStopped::class, $item->resume()->getState());
$this->assertInstanceOf(StateStopped::class, $item->stop()->getState());
$this->assertInstanceOf(StateStopped::class, $item->discard()->getState());
$this->assertInstanceOf(StateInit::class, $item->setInitState()->getState());
$this->assertInstanceOf(StateInit::class, $item->start()->discard()->getState());
$this->assertInstanceOf(StateInit::class, $item->start()->pause()->discard()->getState());
$this->assertInstanceOf(StateStopped::class, $item->start()->stop()->getState());
$cloned = clone $item;
$this->assertInstanceOf(StateInit::class, $cloned->getState());
}