Ejemplo n.º 1
0
  @Test
  public void clearTest() {
    final RoaringBitmap rb = new RoaringBitmap();
    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 RoaringBitmap rb2 = new RoaringBitmap();
    final RoaringBitmap rb3 = new RoaringBitmap();
    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 RoaringBitmap andresult = RoaringBitmap.and(rb, rb2);
    final RoaringBitmap orresult = RoaringBitmap.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));
  }