public virtual void DifferenceTest()
{
int[] set1 = { 1, 2, 3, 7 };
IBitset testSet1 = CreateSetFromIndices(set1, 8);
int[] set2 = { 1, 4, 7 };
IBitset testSet2 = CreateSetFromIndices(set2, 8);
// These sparse sets will all use array containers.
IBitset arrayContainerDiffSet = testSet1.Difference(testSet2);
Assert.AreEqual(false, arrayContainerDiffSet.Get(1));
Assert.AreEqual(true, arrayContainerDiffSet.Get(3));
// Test difference from large contiguous bitset to exercise bitsetcontainers.
int[] set3 = SetGenerator.GetContiguousArray(0, 5000);
IBitset testSet3 = CreateSetFromIndices(set3, 5000);
int[] setExceptions = { 4 };
int[] set4 = SetGenerator.GetContiguousArrayWithExceptions(0, 5000, setExceptions);
IBitset testSet4 = CreateSetFromIndices(set4, 5000);
// Both sets are using bitset containers
IBitset bitsetContainerDiffSet = testSet3.Difference(testSet4);
Assert.AreEqual(false, bitsetContainerDiffSet.Get(1));
Assert.AreEqual(true, bitsetContainerDiffSet.Get(4));
// Diff sets using bitset containers with array containers and vice versa
IBitset mixedDiffSet1 = testSet4.Difference(testSet2);
IBitset mixedDiffSet2 = testSet2.Difference(testSet4);
Assert.AreEqual(false, mixedDiffSet1.Get(1));
Assert.AreEqual(true, mixedDiffSet1.Get(3));
Assert.AreEqual(false, mixedDiffSet2.Get(1));
Assert.AreEqual(true, mixedDiffSet2.Get(4));
}
