layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x36
  LayoutBlockFlow {book} at (0,0) size 800x36
    LayoutBlockFlow {xhtml:div} at (0,0) size 800x18
      LayoutText {#text} at (0,0) size 687x17
        text run at (0,0) width 687: "This test checks whether CSS21 attribute selectors are re-evaluated after attribute changes in xml elements."
    LayoutBlockFlow {test} at (0,18) size 800x18 [color=#008000]
      LayoutInline {<pseudo:before>} at (0,0) size 59x17
        LayoutTextFragment (anonymous) at (0,0) size 59x17
          text run at (0,0) width 59: "PASSED"