public function testGetThumbnailPath()
{
$image = 'image_name.jpg';
$thumbnailPath = '/' . implode('/', [\Magento\Theme\Model\Wysiwyg\Storage::TYPE_IMAGE, \Magento\Theme\Model\Wysiwyg\Storage::THUMBNAIL_DIRECTORY, $image]);
$this->customization->expects($this->any())->method('getCustomizationPath')->will($this->returnValue($this->customizationPath));
$this->directoryWrite->expects($this->any())->method('isExist')->will($this->returnValue(true));
$this->assertEquals($thumbnailPath, $this->helper->getThumbnailPath($image));
}
