Example #1
0
        public void Collections_BitVectorsRangeOperationsTest()
        {
            const int k_initial_size = Bits.kInt32BitCount;
            uint      bits           = (uint)((1UL << k_initial_size) - 1);
            var       bs             = new BitVector32(bits);

            Assert.AreEqual(k_initial_size, bs.Cardinality);
            Assert.AreEqual(0, bs.CardinalityZeros);

            // clear all but the first bit
            bs.ClearBits(1, k_initial_size - 1);
            Assert.AreEqual(1, bs.Cardinality);
            Assert.AreEqual(k_initial_size - 1, bs.CardinalityZeros);

            // set all the modified bits back
            bs.SetBits(1, k_initial_size - 1);
            Assert.AreEqual(k_initial_size, bs.Cardinality);
            Assert.AreEqual(0, bs.CardinalityZeros);

            // will invert all the bits (to false)
            bs.ToggleBits(0, bs.Length);
            Assert.AreEqual(0, bs.Cardinality);
            Assert.AreEqual(k_initial_size, bs.CardinalityZeros);

            // this should do nothing
            bs.SetBits(1, 0);
            Assert.AreEqual(0, bs.Cardinality);
            Assert.AreEqual(k_initial_size, bs.CardinalityZeros);

            Assert.IsFalse(bs.TestBits(0, bs.Length));

            bs.SetBits(k_initial_size - 2, 2);
            Assert.IsTrue(bs.TestBits(0, bs.Length));
        }