This test passes if the container's scrolling contents layer (the first child of the GraphicsLayer with 4 children) doesn't draw content at all, and its scrolling block selection layer (the child of the scrolling contents layer) draws content only on iteration 2. The scrolling block selection layer should also be much smaller than the scrolling contents layer.
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum
Lorem Ipsum


*** iteration 1: ***

{
  "bounds": [800, 600],
  "children": [
    {
      "bounds": [800, 600],
      "contentsOpaque": true,
      "drawsContent": true,
      "children": [
        {
          "position": [8, 56],
          "bounds": [300, 500],
          "drawsContent": true,
          "children": [
            {
              "bounds": [285, 485],
              "children": [
                {
                  "bounds": [285, 665],
                  "shouldFlattenTransform": false,
                  "children": [
                    {
                      "shouldFlattenTransform": false
                    }
                  ]
                }
              ]
            },
            {
              "children": [
                {
                  "position": [0, 485],
                  "bounds": [285, 15]
                },
                {
                  "position": [285, 0],
                  "bounds": [15, 485]
                },
                {
                  "position": [285, 485],
                  "bounds": [15, 15],
                  "drawsContent": true
                }
              ]
            }
          ]
        },
        {
          "position": [23, 71],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 136],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 201],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 266],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 331],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 396],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 461],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 526],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 591],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 656],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        }
      ]
    }
  ]
}


*** iteration 2: ***

{
  "bounds": [785, 2194],
  "children": [
    {
      "bounds": [785, 2194],
      "contentsOpaque": true,
      "drawsContent": true,
      "children": [
        {
          "position": [8, 56],
          "bounds": [300, 500],
          "drawsContent": true,
          "children": [
            {
              "bounds": [285, 485],
              "children": [
                {
                  "bounds": [285, 665],
                  "shouldFlattenTransform": false,
                  "children": [
                    {
                      "position": [0, 195],
                      "bounds": [285, 15],
                      "shouldFlattenTransform": false,
                      "drawsContent": true
                    }
                  ]
                }
              ]
            },
            {
              "children": [
                {
                  "position": [0, 485],
                  "bounds": [285, 15]
                },
                {
                  "position": [285, 0],
                  "bounds": [15, 485]
                },
                {
                  "position": [285, 485],
                  "bounds": [15, 15],
                  "drawsContent": true
                }
              ]
            }
          ]
        },
        {
          "position": [23, 71],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 136],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 201],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 266],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 331],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 396],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 461],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 526],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 591],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 656],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        }
      ]
    }
  ]
}


*** iteration 3: ***

{
  "bounds": [785, 3845],
  "children": [
    {
      "bounds": [785, 3845],
      "contentsOpaque": true,
      "drawsContent": true,
      "children": [
        {
          "position": [8, 56],
          "bounds": [300, 500],
          "drawsContent": true,
          "children": [
            {
              "bounds": [285, 485],
              "children": [
                {
                  "bounds": [285, 665],
                  "shouldFlattenTransform": false,
                  "children": [
                    {
                      "position": [0, 195],
                      "bounds": [285, 15],
                      "shouldFlattenTransform": false
                    }
                  ]
                }
              ]
            },
            {
              "children": [
                {
                  "position": [0, 485],
                  "bounds": [285, 15]
                },
                {
                  "position": [285, 0],
                  "bounds": [15, 485]
                },
                {
                  "position": [285, 485],
                  "bounds": [15, 15],
                  "drawsContent": true
                }
              ]
            }
          ]
        },
        {
          "position": [23, 71],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 136],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 201],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 266],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 331],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 396],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 461],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 526],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 591],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        },
        {
          "position": [23, 656],
          "bounds": [100, 50],
          "contentsOpaque": true,
          "drawsContent": true,
          "backgroundColor": "#FFA500"
        }
      ]
    }
  ]
}