text: {
    var tile = d3_hierarchy.treemapSquarify.ratio(1),
      root = {
        value: 24,
        children: [
          {
            value: 6
          },
          {
            value: 6
          },
          {
            value: 4
          },
          {
            value: 3
          },
          {
            value: 2
          },
          {
            value: 2
          },
          {
            value: 1
          }
        ]
      };
    tile(root, 0, 0, 6, 4);
    test.deepEqual(root.children.map(round), [
      {
        x0: 0.0,
        x1: 3.0,
        y0: 0.0,
        y1: 2.0
      },
      {
        x0: 0.0,
        x1: 3.0,
        y0: 2.0,
        y1: 4.0
      },
      {
        x0: 3.0,
        x1: 4.71,
        y0: 0.0,
        y1: 2.33
      },
      {
        x0: 4.71,
        x1: 6.0,
        y0: 0.0,
        y1: 2.33
      },
      {
        x0: 3.0,
        x1: 4.2,
        y0: 2.33,
        y1: 4.0
      },
      {
        x0: 4.2,
        x1: 5.4,
        y0: 2.33,
        y1: 4.0
      },
      {
        x0: 5.4,
        x1: 6.0,
        y0: 2.33,
        y1: 4.0
      }
    ]);
    test.end();
  }
  