@SuppressWarnings("resource") @Test public void testProperSerializationA() throws IOException { // denser, so we should have run containers final int SIZE = 500; final Random rand = new Random(0); for (int i = 0; i < SIZE; ++i) { MutableRoaringBitmap r = new MutableRoaringBitmap(); for (int k = 0; k < 500000; ++k) { if (rand.nextDouble() < .9) { r.add(k); } } r.runOptimize(); ByteBuffer b = ByteBuffer.allocate(r.serializedSizeInBytes()); r.serialize( new DataOutputStream( new OutputStream() { ByteBuffer mBB; @Override public void close() {} @Override public void flush() {} OutputStream init(final ByteBuffer mbb) { mBB = mbb; return this; } @Override public void write(final byte[] b) { mBB.put(b); } @Override public void write(final byte[] b, final int off, final int l) { mBB.put(b, off, l); } @Override public void write(final int b) { mBB.put((byte) b); } }.init(b))); b.flip(); ImmutableRoaringBitmap irb = new ImmutableRoaringBitmap(b); Assert.assertTrue(irb.hashCode() == r.hashCode()); Assert.assertTrue(irb.getCardinality() == r.getCardinality()); } }