/**
* @magentoAppIsolation enabled
*/
public function testAddMessage()
{
$errorMessage = $this->objectManager->create('Magento\\Framework\\Message\\Error', array('text' => 'some text'));
$this->model->addMessage($errorMessage);
$customGroup = 'custom-group';
$errorMessageCustom = $this->objectManager->create('Magento\\Framework\\Message\\Error', array('text' => 'some custom group'));
$this->model->addMessage($errorMessageCustom, $customGroup);
$this->assertEquals($errorMessage, $this->model->getMessages()->getLastAddedMessage());
$this->assertEquals($errorMessageCustom, $this->model->getMessages(false, $customGroup)->getLastAddedMessage());
$this->assertEquals($errorMessageCustom, $this->model->getMessages(true, $customGroup)->getLastAddedMessage());
$this->assertEmpty($this->model->getMessages(false, $customGroup)->getItems());
$this->assertEmpty($this->model->getMessages(false, $customGroup)->getLastAddedMessage());
}