public function testToHtmlPreviewImageUrl()
{
/** @var $objectManager \Magento\TestFramework\ObjectManager */
$this->_theme->setType(\Magento\Framework\View\Design\ThemeInterface::TYPE_PHYSICAL);
$this->_theme->setPreviewImage('preview_image_test.jpg');
$this->_block->setArea('adminhtml');
$html = $this->_block->toHtml();
preg_match_all('/pub\\/static\\/adminhtml\\/_view\\/en_US/', $html, $result);
$this->assertEmpty($result[0]);
}
public function testToHtmlPreviewImageNote()
{
/** @var $objectManager \Magento\TestFramework\ObjectManager */
$objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
$objectManager->get('Magento\\Framework\\Registry')->register('current_theme', $this->_theme);
$this->_block->setArea('adminhtml');
$this->_block->toHtml();
$noticeText = $this->_block->getForm()->getElement('preview_image')->getNote();
$this->assertNotEmpty($noticeText);
}