function testLetterboxFileNaming() { $file_loc = self::copyTestImage('eastern.jpg'); $upload_dir = wp_upload_dir(); $url_src = $upload_dir['url'] . '/eastern.jpg'; $filename = TimberImageHelper::get_letterbox_file_url($url_src, 300, 500, '#FFFFFF'); $this->assertEquals($upload_dir['url'] . '/eastern-lbox-300x500-FFFFFF.jpg', $filename); }