@Test
  public void ortest2() {
    final int[] arrayrr = new int[4000 + 4000 + 2];
    int pos = 0;
    final MutableRoaringBitmap rr = new MutableRoaringBitmap();
    for (int k = 0; k < 4000; ++k) {
      rr.add(k);
      arrayrr[pos++] = k;
    }
    rr.add(100000);
    rr.add(110000);
    final MutableRoaringBitmap rr2 = new MutableRoaringBitmap();
    for (int k = 4000; k < 8000; ++k) {
      rr2.add(k);
      arrayrr[pos++] = k;
    }

    arrayrr[pos++] = 100000;
    arrayrr[pos++] = 110000;

    final MutableRoaringBitmap rror = MutableRoaringBitmap.or(rr, rr2);

    final int[] arrayor = rror.toArray();

    Assert.assertTrue(Arrays.equals(arrayor, arrayrr));
  }
  @Test
  public void andtest() {
    final MutableRoaringBitmap rr = new MutableRoaringBitmap();
    for (int k = 0; k < 4000; ++k) {
      rr.add(k);
    }
    rr.add(100000);
    rr.add(110000);
    final MutableRoaringBitmap rr2 = new MutableRoaringBitmap();
    rr2.add(13);
    final MutableRoaringBitmap rrand = MutableRoaringBitmap.and(rr, rr2);
    int[] array = rrand.toArray();

    Assert.assertEquals(array.length, 1);
    Assert.assertEquals(array[0], 13);
    rr.and(rr2);
    array = rr.toArray();
    Assert.assertEquals(array.length, 1);
    Assert.assertEquals(array[0], 13);
  }
  @Test
  public void clearTest() {
    final MutableRoaringBitmap rb = new MutableRoaringBitmap();
    for (int i = 0; i < 200000; i += 7)
      // dense
      rb.add(i);
    for (int i = 200000; i < 400000; i += 177)
      // sparse
      rb.add(i);

    final MutableRoaringBitmap rb2 = new MutableRoaringBitmap();
    final MutableRoaringBitmap rb3 = new MutableRoaringBitmap();
    for (int i = 0; i < 200000; i += 4) rb2.add(i);
    for (int i = 200000; i < 400000; i += 14) rb2.add(i);

    rb.clear();
    Assert.assertEquals(0, rb.getCardinality());
    Assert.assertTrue(0 != rb2.getCardinality());

    rb.add(4);
    rb3.add(4);
    final MutableRoaringBitmap andresult = MutableRoaringBitmap.and(rb, rb2);
    final MutableRoaringBitmap orresult = MutableRoaringBitmap.or(rb, rb2);

    Assert.assertEquals(1, andresult.getCardinality());
    Assert.assertEquals(rb2.getCardinality(), orresult.getCardinality());

    for (int i = 0; i < 200000; i += 4) {
      rb.add(i);
      rb3.add(i);
    }
    for (int i = 200000; i < 400000; i += 114) {
      rb.add(i);
      rb3.add(i);
    }

    final int[] arrayrr = rb.toArray();
    final int[] arrayrr3 = rb3.toArray();

    Assert.assertTrue(Arrays.equals(arrayrr, arrayrr3));
  }
  @Test
  public void ortest() {
    final MutableRoaringBitmap rr = new MutableRoaringBitmap();
    for (int k = 0; k < 4000; ++k) {
      rr.add(k);
    }
    rr.add(100000);
    rr.add(110000);
    final MutableRoaringBitmap rr2 = new MutableRoaringBitmap();
    for (int k = 0; k < 4000; ++k) {
      rr2.add(k);
    }

    final MutableRoaringBitmap rror = MutableRoaringBitmap.or(rr, rr2);

    final int[] array = rror.toArray();
    final int[] arrayrr = rr.toArray();

    Assert.assertTrue(Arrays.equals(array, arrayrr));

    rr.or(rr2);
    final int[] arrayirr = rr.toArray();
    Assert.assertTrue(Arrays.equals(array, arrayirr));
  }
  @Test
  public void andtest3() {
    final int[] arrayand = new int[11256];
    int pos = 0;
    final MutableRoaringBitmap rr = new MutableRoaringBitmap();
    for (int k = 4000; k < 4256; ++k) rr.add(k);
    for (int k = 65536; k < 65536 + 4000; ++k) rr.add(k);
    for (int k = 3 * 65536; k < 3 * 65536 + 1000; ++k) rr.add(k);
    for (int k = 3 * 65536 + 1000; k < 3 * 65536 + 7000; ++k) rr.add(k);
    for (int k = 3 * 65536 + 7000; k < 3 * 65536 + 9000; ++k) rr.add(k);
    for (int k = 4 * 65536; k < 4 * 65536 + 7000; ++k) rr.add(k);
    for (int k = 6 * 65536; k < 6 * 65536 + 10000; ++k) rr.add(k);
    for (int k = 8 * 65536; k < 8 * 65536 + 1000; ++k) rr.add(k);
    for (int k = 9 * 65536; k < 9 * 65536 + 30000; ++k) rr.add(k);

    final MutableRoaringBitmap rr2 = new MutableRoaringBitmap();
    for (int k = 4000; k < 4256; ++k) {
      rr2.add(k);
      arrayand[pos++] = k;
    }
    for (int k = 65536; k < 65536 + 4000; ++k) {
      rr2.add(k);
      arrayand[pos++] = k;
    }
    for (int k = 3 * 65536 + 1000; k < 3 * 65536 + 7000; ++k) {
      rr2.add(k);
      arrayand[pos++] = k;
    }
    for (int k = 6 * 65536; k < 6 * 65536 + 1000; ++k) {
      rr2.add(k);
      arrayand[pos++] = k;
    }
    for (int k = 7 * 65536; k < 7 * 65536 + 1000; ++k) {
      rr2.add(k);
    }
    for (int k = 10 * 65536; k < 10 * 65536 + 5000; ++k) {
      rr2.add(k);
    }

    final MutableRoaringBitmap rrand = MutableRoaringBitmap.and(rr, rr2);

    final int[] arrayres = rrand.toArray();

    for (int i = 0; i < arrayres.length; i++)
      if (arrayres[i] != arrayand[i]) System.out.println(arrayres[i]);

    Assert.assertTrue(Arrays.equals(arrayand, arrayres));
  }
 @Test
 public void basictest() {
   final MutableRoaringBitmap rr = new MutableRoaringBitmap();
   final int N = 4000;
   final int[] a = new int[N + 2];
   int pos = 0;
   for (int k = 0; k < N; ++k) {
     rr.add(k);
     a[pos++] = k;
   }
   rr.add(100000);
   a[pos++] = 100000;
   rr.add(110000);
   a[pos++] = 110000;
   final int[] array = rr.toArray();
   for (int i = 0; i < array.length; i++)
     if (array[i] != a[i]) System.out.println("rr : " + array[i] + " a : " + a[i]);
   Assert.assertTrue(Arrays.equals(array, a));
 }
  public void rTest(final int N) {
    System.out.println("rtest N=" + N);
    for (int gap = 1; gap <= 65536; gap *= 2) {
      final BitSet bs1 = new BitSet();
      final MutableRoaringBitmap rb1 = new MutableRoaringBitmap();
      for (int x = 0; x <= N; x += gap) {
        bs1.set(x);
        rb1.add(x);
      }
      if (bs1.cardinality() != rb1.getCardinality()) throw new RuntimeException("different card");
      if (!equals(bs1, rb1)) throw new RuntimeException("basic  bug");
      for (int offset = 1; offset <= gap; offset *= 2) {
        final BitSet bs2 = new BitSet();
        final MutableRoaringBitmap rb2 = new MutableRoaringBitmap();
        for (int x = 0; x <= N; x += gap) {
          bs2.set(x + offset);
          rb2.add(x + offset);
        }
        if (bs2.cardinality() != rb2.getCardinality()) throw new RuntimeException("different card");
        if (!equals(bs2, rb2)) throw new RuntimeException("basic  bug");

        BitSet clonebs1;
        // testing AND
        clonebs1 = (BitSet) bs1.clone();
        clonebs1.and(bs2);
        if (!equals(clonebs1, MutableRoaringBitmap.and(rb1, rb2)))
          throw new RuntimeException("bug and");
        {
          final MutableRoaringBitmap t = rb1.clone();
          t.and(rb2);
          if (!equals(clonebs1, t)) throw new RuntimeException("bug inplace and");
          if (!t.equals(MutableRoaringBitmap.and(rb1, rb2))) {
            System.out.println(
                t.highLowContainer.getContainerAtIndex(0).getClass().getCanonicalName());
            System.out.println(
                MutableRoaringBitmap.and(rb1, rb2)
                    .highLowContainer
                    .getContainerAtIndex(0)
                    .getClass()
                    .getCanonicalName());

            throw new RuntimeException("bug inplace and");
          }
        }

        // testing OR
        clonebs1 = (BitSet) bs1.clone();
        clonebs1.or(bs2);

        if (!equals(clonebs1, MutableRoaringBitmap.or(rb1, rb2)))
          throw new RuntimeException("bug or");
        {
          final MutableRoaringBitmap t = rb1.clone();
          t.or(rb2);
          if (!equals(clonebs1, t)) throw new RuntimeException("bug or");
          if (!t.equals(MutableRoaringBitmap.or(rb1, rb2))) throw new RuntimeException("bug or");
          if (!t.toString().equals(MutableRoaringBitmap.or(rb1, rb2).toString()))
            throw new RuntimeException("bug or");
        }
        // testing XOR
        clonebs1 = (BitSet) bs1.clone();
        clonebs1.xor(bs2);
        if (!equals(clonebs1, MutableRoaringBitmap.xor(rb1, rb2))) {
          throw new RuntimeException("bug xor");
        }
        {
          final MutableRoaringBitmap t = rb1.clone();
          t.xor(rb2);
          if (!equals(clonebs1, t)) throw new RuntimeException("bug xor");

          if (!t.equals(MutableRoaringBitmap.xor(rb1, rb2))) {
            System.out.println(t);
            System.out.println(MutableRoaringBitmap.xor(rb1, rb2));
            System.out.println(
                Arrays.equals(t.toArray(), MutableRoaringBitmap.xor(rb1, rb2).toArray()));
            throw new RuntimeException("bug xor");
          }
        }
        // testing NOTAND
        clonebs1 = (BitSet) bs1.clone();
        clonebs1.andNot(bs2);
        if (!equals(clonebs1, MutableRoaringBitmap.andNot(rb1, rb2))) {
          throw new RuntimeException("bug andnot");
        }
        clonebs1 = (BitSet) bs2.clone();
        clonebs1.andNot(bs1);
        if (!equals(clonebs1, MutableRoaringBitmap.andNot(rb2, rb1))) {
          throw new RuntimeException("bug andnot");
        }
        {
          final MutableRoaringBitmap t = rb2.clone();
          t.andNot(rb1);
          if (!equals(clonebs1, t)) {
            throw new RuntimeException("bug inplace andnot");
          }
          final MutableRoaringBitmap g = MutableRoaringBitmap.andNot(rb2, rb1);
          if (!equals(clonebs1, g)) {
            throw new RuntimeException("bug andnot");
          }
          if (!t.equals(g)) throw new RuntimeException("bug");
        }
        clonebs1 = (BitSet) bs1.clone();
        clonebs1.andNot(bs2);
        if (!equals(clonebs1, MutableRoaringBitmap.andNot(rb1, rb2))) {
          throw new RuntimeException("bug andnot");
        }
        {
          final MutableRoaringBitmap t = rb1.clone();
          t.andNot(rb2);
          if (!equals(clonebs1, t)) {
            throw new RuntimeException("bug andnot");
          }
          final MutableRoaringBitmap g = MutableRoaringBitmap.andNot(rb1, rb2);
          if (!equals(clonebs1, g)) {
            throw new RuntimeException("bug andnot");
          }
          if (!t.equals(g)) throw new RuntimeException("bug");
        }
      }
    }
  }
  @Test
  public void ortest3() {
    final HashSet<Integer> V1 = new HashSet<Integer>();
    final HashSet<Integer> V2 = new HashSet<Integer>();

    final MutableRoaringBitmap rr = new MutableRoaringBitmap();
    final MutableRoaringBitmap rr2 = new MutableRoaringBitmap();
    // For the first 65536: rr2 has a bitmap container, and rr has
    // an array container.
    // We will check the union between a BitmapCintainer and an
    // arrayContainer
    for (int k = 0; k < 4000; ++k) {
      rr2.add(k);
      V1.add(k);
    }
    for (int k = 3500; k < 4500; ++k) {
      rr.add(k);
      V1.add(k);
    }
    for (int k = 4000; k < 65000; ++k) {
      rr2.add(k);
      V1.add(k);
    }

    // In the second node of each roaring bitmap, we have two bitmap
    // containers.
    // So, we will check the union between two BitmapContainers
    for (int k = 65536; k < 65536 + 10000; ++k) {
      rr.add(k);
      V1.add(k);
    }

    for (int k = 65536; k < 65536 + 14000; ++k) {
      rr2.add(k);
      V1.add(k);
    }

    // In the 3rd node of each Roaring Bitmap, we have an
    // ArrayContainer, so, we will try the union between two
    // ArrayContainers.
    for (int k = 4 * 65535; k < 4 * 65535 + 1000; ++k) {
      rr.add(k);
      V1.add(k);
    }

    for (int k = 4 * 65535; k < 4 * 65535 + 800; ++k) {
      rr2.add(k);
      V1.add(k);
    }

    // For the rest, we will check if the union will take them in
    // the result
    for (int k = 6 * 65535; k < 6 * 65535 + 1000; ++k) {
      rr.add(k);
      V1.add(k);
    }

    for (int k = 7 * 65535; k < 7 * 65535 + 2000; ++k) {
      rr2.add(k);
      V1.add(k);
    }

    final MutableRoaringBitmap rror = MutableRoaringBitmap.or(rr, rr2);
    boolean valide = true;

    // Si tous les elements de rror sont dans V1 et que tous les
    // elements de
    // V1 sont dans rror(V2)
    // alors V1 == rror

    final Object[] tab = V1.toArray();
    final Vector<Integer> vector = new Vector<Integer>();
    for (Object aTab : tab) vector.add((Integer) aTab);

    for (final int i : rror.toArray()) {
      if (!vector.contains(i)) {
        valide = false;
      }
      V2.add(i);
    }
    for (int i = 0; i < V1.size(); i++)
      if (!V2.contains(vector.elementAt(i))) {
        valide = false;
      }

    Assert.assertEquals(valide, true);
  }
 public static boolean equals(BitSet bs, MutableRoaringBitmap rr) {
   final int[] a = new int[bs.cardinality()];
   int pos = 0;
   for (int x = bs.nextSetBit(0); x >= 0; x = bs.nextSetBit(x + 1)) a[pos++] = x;
   return Arrays.equals(rr.toArray(), a);
 }