public void Test_SubGridTreeBitmapSubGridBitsTests_ForEachClearBit()
{
// Test iteration action for empty, full and arbitrary masks
SubGridTreeBitmapSubGridBits bits = new SubGridTreeBitmapSubGridBits(SubGridBitsCreationOptions.Filled);
int sum;
sum = 0;
bits.ForEachClearBit((x, y) => { sum++; });
Assert.Equal(0, sum);
sum = 0;
bits.Clear();
bits.ForEachClearBit((x, y) => { sum++; });
Assert.Equal(sum, SubGridTreeConsts.CellsPerSubGrid);
sum = 0;
bits.SetBit(1, 1);
bits.ForEachClearBit((x, y) => { sum++; });
Assert.Equal(sum, SubGridTreeConsts.CellsPerSubGrid - 1);
}