/**
* New states are added to the end only
*
* @return void
*/
public function testNewStatesAreAddedToTheEnd()
{
$stateMachine = new StateMachine();
$stateMachine->addState("<?xml version=\"1.0\"?><listofitems><item id=\"1\" index=\"1\">First</item><item id=\"2\">Second</item></listofitems>");
$stateMachine->addState("<?xml version=\"1.0\"?><listofitems><item id=\"2\">second</item><item id=\"3\">Third</item></listofitems>");
$stateMachine->addState("<?xml version=\"1.0\"?><listofitems><item id=\"1\" index=\"1\">First</item><item id=\"2\">Second</item></listofitems>");
$stateMachine->addState("<?xml version=\"1.0\"?><listofitems><item id=\"4\">Fourth</item></listofitems>");
$this->assertEquals(true, $stateMachine->verifyIntegrity());
$stateMachine->addState("<?xml version=\"1.0\"?><listofitems><item id=\"5\">fifth</item><item id=\"3\">Third</item></listofitems>");
$this->assertXmlStringEqualsXmlString("<?xml version=\"1.0\"?><listofitems><item id=\"2\">second</item><item id=\"3\">Third</item></listofitems>", $stateMachine->getState(2));
$this->assertEquals(true, $stateMachine->verifyIntegrity());
}