layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x56
  RenderBlock {html} at (0,0) size 800x56
    RenderBody {body} at (8,8) size 784x40
      RenderBlock {tests} at (0,0) size 784x40 [color=#FF0000]
        RenderBlock {testA} at (0,0) size 784x20 [color=#008000]
          RenderText {#text} at (0,0) size 128x19
            text run at (0,0) width 128: "This should be green."
        RenderBlock {testB} at (0,20) size 784x20 [color=#008000]
          RenderText {#text} at (0,0) size 128x19
            text run at (0,0) width 128: "This should be green."