Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x66 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x50 children: not-inline
      BlockContainer <div.container> at (8,8) content-size 100x50 children: not-inline
        BlockContainer <div.foo> at (8,8) content-size 99x50 children: not-inline
