public void containsNull()
        {
            IndexRange range = IndexRange.NULL_RANGE;

            Assert.False(range.containsInclusive(-1));
            Assert.False(range.containsInclusive(0));
            Assert.False(range.containsInclusive(1));
            Assert.False(range.containsInclusive(2));
        }
        public void contains()
        {
            IndexRange range = new IndexRange(2, 4);

            Assert.False(range.containsInclusive(1));
            Assert.True(range.containsInclusive(2));
            Assert.True(range.containsInclusive(3));
            Assert.True(range.containsInclusive(4));
            Assert.False(range.containsInclusive(5));
        }