protected function setUp()
{
parent::setUp();
$this->_layout = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->get('Magento\\Framework\\View\\LayoutInterface');
$this->_theme = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->create('Magento\\Framework\\View\\Design\\ThemeInterface');
$this->_theme->setType(\Magento\Framework\View\Design\ThemeInterface::TYPE_VIRTUAL);
$this->_block = $this->_layout->createBlock('Magento\\Theme\\Block\\Adminhtml\\System\\Design\\Theme\\Edit\\Tab\\General');
}
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]);
}
