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  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x600
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    RenderBody {BODY} at (8,8) size 784x576
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          text run at (0,0) width 137: "You should see a 500"
          text run at (137,0) width 326: "x300 rectangle with orange, yellow and olive rects. "
          text run at (463,0) width 287: "No red should be visible or the test has failed."
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