Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x100 children: not-inline
      Box <div.grid> at (8,8) content-size 100x100 [GFC] children: not-inline
        BlockContainer <div.test> at (8,8) content-size 100x100 [BFC] children: not-inline
          BlockContainer <div.big-child> at (8,8) content-size 500x100 children: not-inline
