/**
* @expectedException \Magento\Framework\Exception\LocalizedException
* @expectedExceptionMessage header_logo_src does not contain field 'file'
*/
public function testBeforeSaveWithoutFile()
{
$this->fileBackend->setData(['value' => ['test' => ''], 'field_config' => ['field' => 'header_logo_src']]);
$this->fileBackend->beforeSave();
}
