public void Test_SubGrid_GetOTGLeafSubGridCellIndex()
{
SubGridTree tree = new SubGridTree(SubGridTreeConsts.SubGridTreeLevels, 1.0, new SubGridFactory <NodeSubGrid, LeafSubGrid>());
var subGrid = new SubGrid(tree, null, 6);
subGrid.GetOTGLeafSubGridCellIndex(0, 0, out byte subGridX, out byte subGridY);
subGridX.Should().Be(0);
subGridY.Should().Be(0);
subGrid.GetOTGLeafSubGridCellIndex(SubGridTreeConsts.SubGridTreeDimensionMinus1, SubGridTreeConsts.SubGridTreeDimensionMinus1, out subGridX, out subGridY);
subGridX.Should().Be(SubGridTreeConsts.SubGridTreeDimensionMinus1);
subGridY.Should().Be(SubGridTreeConsts.SubGridTreeDimensionMinus1);
subGrid.GetOTGLeafSubGridCellIndex(SubGridTreeConsts.SubGridTreeDimension, SubGridTreeConsts.SubGridTreeDimension, out subGridX, out subGridY);
subGridX.Should().Be(0);
subGridY.Should().Be(0);
}