assertThat(ArbitraryInstances.get(Ticker.class)).isNotNull();
    assertFreshInstanceReturned(Random.class);
    assertEquals(
        ArbitraryInstances.get(Random.class).nextInt(),
        ArbitraryInstances.get(Random.class).nextInt());
  }

  public void testGet_concurrent() {
    assertTrue(ArbitraryInstances.get(BlockingDeque.class).isEmpty());
    assertTrue(ArbitraryInstances.get(BlockingQueue.class).isEmpty());

      new ThreadLocal<Random>() {
        @Override
        protected Random initialValue() {
          return new Random();
        }
      };

  private static final int GOLDEN_PRESENT_KEY = random.get().nextInt();

  @AndroidIncompatible // OutOfMemoryError
  public void testLargeBloomFilterDoesntOverflow() {
    long numBits = Integer.MAX_VALUE;
    numBits++;

    LockFreeBitArray bitArray = new LockFreeBitArray(numBits);

    assertThat(ArbitraryInstances.get(Ticker.class)).isNotNull();
    assertFreshInstanceReturned(Random.class);
    assertEquals(
        ArbitraryInstances.get(Random.class).nextInt(),
        ArbitraryInstances.get(Random.class).nextInt());
  }

  public void testGet_concurrent() {
    assertTrue(ArbitraryInstances.get(BlockingDeque.class).isEmpty());
    assertTrue(ArbitraryInstances.get(BlockingQueue.class).isEmpty());

    for (int i = 0; i < heapSize; i++) {
      mmHeap.add(random.nextInt());
    }
    for (int i = 0; i < numberOfModifications; i++) {
      mmHeap.removeAtForTesting(random.nextInt(mmHeap.size()));
      assertIntactUsingSeed(seed, mmHeap);
      mmHeap.add(random.nextInt());
      assertIntactUsingSeed(seed, mmHeap);
    }
  }

  public void testRemoveAt_exhaustive() {

    for (int i = 0; i < heapSize; i++) {
      mmHeap.add(random.nextInt());
    }
    for (int i = 0; i < numberOfModifications; i++) {
      mmHeap.removeAtForTesting(random.nextInt(mmHeap.size()));
      assertIntactUsingSeed(seed, mmHeap);
      mmHeap.add(random.nextInt());
      assertIntactUsingSeed(seed, mmHeap);
    }
  }

  public void testRemoveAt_exhaustive() {

            List<ChannelInfo> list = new ArrayList<>(channels);
            return list.get(ThreadLocalRandom.current().nextInt(list.size()));
        }
        
        // Weighted random selection
        int random = ThreadLocalRandom.current().nextInt(totalWeight);
        int currentWeight = 0;
        
        for (ChannelInfo channel : channels) {
            currentWeight += channel.getScore();

        int len = random.nextInt(value.length - off + 1);
        for (PrimitiveSink sink : sinks) {
          sink.putBytes(value, off, len);
        }
      }
    },
    PUT_BYTE_BUFFER() {
      @Override
      void performAction(Random random, Iterable<? extends PrimitiveSink> sinks) {
        byte[] value = new byte[random.nextInt(128)];
        random.nextBytes(value);

    assertEquals(-1L, map.get(key));
  }

  public void testAddAndGet() {
    AtomicLongMap<String> map = AtomicLongMap.create();
    String key = "key";
    long addend = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);
      long result = map.addAndGet(key, addend);
      long after = map.get(key);
      assertEquals(before + addend, after);

    PrimitiveIterator.OfInt intIterator =
        (PrimitiveIterator.OfInt) ImmutableIntArray.of(1, 2, 3).asList().iterator();
    assertThat(intIterator.nextInt()).isEqualTo(1);
    assertThat(intIterator.nextInt()).isEqualTo(2);
    assertThat(intIterator.nextInt()).isEqualTo(3);
    assertThat(intIterator.hasNext()).isFalse();
  }

  public void testCopyOf_array_empty() {
    /*

    assertEquals(-1L, map.get(key));
  }

  public void testAddAndGet() {
    AtomicLongMap<String> map = AtomicLongMap.create();
    String key = "key";
    long addend = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);
      long result = map.addAndGet(key, addend);
      long after = map.get(key);
      assertEquals(before + addend, after);