assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertThrows(UnsupportedOperationException.class, () -> iterator.remove());
  }

  @SuppressWarnings("DoNotCall")
  public void testAdd() {
    ListIterator<String> iterator = create();

    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertEquals("b", iterator.next());

        Throwable cause = new RuntimeException("Root cause");
        RequestTimeoutException exception = new RequestTimeoutException(cause);
        assertEquals("java.lang.RuntimeException: Root cause", exception.getMessage(), "Message should be derived from the cause");
        assertEquals(cause, exception.getCause(), "Cause should match the provided throwable");
    }

    @Test
    void testMessageAndCauseConstructor() {

        Integer timeout = request.getOverrideTimeout();
        boolean canChain = request.allowChain(nextRequest);

        // Then
        assertTrue(async);
        assertEquals(100, size);
        assertEquals(3000, timeout);
        assertTrue(canChain);
        verify(request).isResponseAsync();
        verify(request).size();
        verify(request).getOverrideTimeout();

        // Then - Verify keys are derived and different
        assertNotNull(signingKey300);
        assertNotNull(signingKey311);
        assertEquals(16, signingKey300.length);
        assertEquals(16, signingKey311.length);
        assertFalse(Arrays.equals(signingKey300, signingKey311));
    }

    @Test
    @DisplayName("Should handle different session key sizes")

    assertThrows(IllegalStateException.class, () -> sha1.hash());
  }

  public void testToString() {
    assertEquals("Hashing.md5()", Hashing.md5().toString());
    assertEquals("Hashing.sha1()", Hashing.sha1().toString());
    assertEquals("Hashing.sha256()", Hashing.sha256().toString());
    assertEquals("Hashing.sha512()", Hashing.sha512().toString());
  }

    multiset.add("foo", 2);
    multiset.add("bar");
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

  public void testCreateWithSize() {
    Multiset<String> multiset = HashMultiset.create(50);
    multiset.add("foo", 2);
    multiset.add("bar");
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

  public void testCreateFromIterable() {

    // Test default state of not started.
    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());
    assertFalse(task.isCancelled());

    // Start the task to put it in the RUNNING state.  Have to use a separate
    // thread because the task will block on the task latch after unblocking
    // the run latch.
    exec.execute(task);
    runLatch.await();
    assertEquals(1, listenerLatch.getCount());

        NameQueryRequest request = new NameQueryRequest(mockConfig, mockName);

        assertNotNull(request);
        assertEquals(mockName, request.questionName);
        assertEquals(NameServicePacket.NB, request.questionType);
    }

    @Test
    void testWriteBodyWireFormat() {
        // Test that writeBodyWireFormat calls writeQuestionSectionWireFormat

        // decode returns 0 when no DACL is present (falls through)
        assertEquals(0, size);
        assertNotNull(securityDescriptor.getOwnerUserSid());
        assertNotNull(securityDescriptor.getOwnerGroupSid());
        assertEquals(3, securityDescriptor.getOwnerUserSid().sub_authority_count);
        assertEquals(2, securityDescriptor.getOwnerGroupSid().sub_authority_count);
    }

    @Test

    Iterator<Entry<String, Integer>> entryIterator = multimap.entries().iterator();
    assertEquals(immutableEntry("foo", 5), entryIterator.next());
    assertEquals(immutableEntry("bar", 4), entryIterator.next());
    assertEquals(immutableEntry("foo", 3), entryIterator.next());
    assertEquals(immutableEntry("cow", 2), entryIterator.next());
    assertEquals(immutableEntry("bar", 1), entryIterator.next());