layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x18
  RenderBlock {test} at (0,0) size 800x18
    RenderInline {testa} at (0,0) size 308x18 [bgcolor=#00FF00]
      RenderText {#text} at (0,0) size 308x18
        text run at (0,0) width 308: "This paragraph should have a green background"
    RenderText {#text} at (0,0) size 0x0