public void PuzzleSet_Subset_Superset_Tests1()
{
var sut1 = new PuzzleSet(PuzzleSize.NineByNine);
var allNumbers = new PuzzleSet(PuzzleSize.NineByNine);
sut1.AddRange(new byte[] { 1, 2, 3, 4 });
allNumbers.AddRange(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 });
TestContext.WriteLine("lowNumbers overlaps allNumbers: {0}",
sut1.Overlaps(allNumbers));
TestContext.WriteLine("allNumbers and lowNumbers are equal sets: {0}",
allNumbers.SetEquals(sut1));
// Show the results of sub/superset testing
Assert.True(sut1.IsSubsetOf(allNumbers));
Assert.True(allNumbers.IsSupersetOf(sut1));
Assert.True(sut1.IsProperSubsetOf(allNumbers));
Assert.True(allNumbers.IsProperSupersetOf(sut1));
// Modify allNumbers to remove numbers that are not in sut1.
allNumbers.IntersectWith(sut1);
Assert.True(allNumbers.SetEquals(sut1));
Assert.True(sut1.IsSubsetOf(allNumbers));
Assert.True(allNumbers.IsSupersetOf(sut1));
Assert.False(sut1.IsProperSubsetOf(allNumbers));
Assert.False(allNumbers.IsProperSupersetOf(sut1));
}