public void Can_calculate_index_at_row_from_node_index(uint row, ulong nodeIndex, uint?indexAtRow)
{
if (indexAtRow == null)
{
Assert.Throws <ArgumentOutOfRangeException>(() => BaselineTree.GetIndexAtRow(row, nodeIndex));
}
else
{
BaselineTree.GetIndexAtRow(row, nodeIndex).Should().Be(indexAtRow.Value);
}
}