2 Test general background optimization
5 background-color: white;
6 background-image: url(123);
7 background-repeat: no-repeat;
8 background-position: 1px 1px;
9 background-attachment: scroll;
15 'background-color' => '#fff',
16 'background-image' => 'url(123)',
17 'background-repeat' => 'no-repeat',
18 'background-position' => '1px 1px',
19 'background-attachment' => 'scroll',