layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x40
  RenderBlock {book} at (0,0) size 800x40
    RenderBlock {xhtml:div} at (0,0) size 800x20
      RenderText {#text} at (0,0) size 644x19
        text run at (0,0) width 644: "This test checks whether CSS21 attribute selectors are re-evaluated after attribute changes in xml elements."
    RenderBlock {test} at (0,20) size 800x20 [color=#008000]
      RenderInline (generated) at (0,0) size 58x19
        RenderText at (0,0) size 58x19
          text run at (0,0) width 58: "PASSED"