Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 74.875 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,21.4375] [8+0+0 784 0+0+8] [8+0+0 32 0+0+8] children: inline
      InlineNode <a> at [8,21.4375] [0+0+0 0 0+0+0] [0+0+0 0 0+0+0]
        frag 0 from BlockContainer start: 0, length: 0, rect: [8,21.4375 784x32] baseline: 0
        InlineNode <span#foo> at [8,21.4375] [0+0+0 0 0+0+0] [0+0+0 16 0+0+0]
        BlockContainer <h1> at [8,21.4375] [0+0+0 784 0+0+0] [21.4375+0+0 32 0+0+21.4375] children: inline
          frag 0 from TextNode start: 0, length: 4, rect: [8,21.4375 63.5625x32] baseline: 25.59375
              "test"
          TextNode <#text> (not painted)
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x74.875]
    PaintableWithLines (BlockContainer<BODY>) [8,21.4375 784x32]
      InlinePaintable (InlineNode<A>) [8,21.4375 0x0]
        InlinePaintable (InlineNode<SPAN>#foo) [8,21.4375 0x16]
        PaintableWithLines (BlockContainer<H1>) [8,21.4375 784x32]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x74.875] (z-index: auto)
