assertEquals(
        "calling multiset.entrySet() twice returned unequal sets",
        getMultiset().entrySet(),
        getMultiset().entrySet());
  }

  @CollectionSize.Require(ZERO)
  public void testEntrySet_hashCode_size0() {
    assertEquals(
        "multiset.entrySet() has incorrect hash code", 0, getMultiset().entrySet().hashCode());
  }

  @CollectionSize.Require(ONE)

    }
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    multimap().clear();
    assertCleared();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearThroughEntries() {
    multimap().entries().clear();
    assertCleared();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearThroughAsMap() {
    multimap().asMap().clear();
    assertCleared();

    assertEquals(
        "calling multiset.entrySet() twice returned unequal sets",
        getMultiset().entrySet(),
        getMultiset().entrySet());
  }

  @CollectionSize.Require(ZERO)
  public void testEntrySet_hashCode_size0() {
    assertEquals(
        "multiset.entrySet() has incorrect hash code", 0, getMultiset().entrySet().hashCode());
  }

  @CollectionSize.Require(ONE)

            }
        }
    }

    private void sendKeepAlive(ChannelInfo channel) throws IOException {
        // Send echo request as keep-alive
        // This would need to be implemented with actual echo request/response
        log.debug("Sending keep-alive for channel {}", channel.getChannelId());
        channel.updateActivity();
    }

    private void discoverInterfaces() {
        if (!multiChannelEnabled)

    void testGetLocalName() {
        // When
        NetbiosName localName = nameServiceClient.getLocalName();

        // Then
        assertNotNull(localName, "Local name should not be null");
        assertTrue(localName.getName().length() > 0, "Local name should not be empty");
    }

    @Test
    @DisplayName("Should get unknown name")
    void testGetUnknownName() {
        // When

    }

    @Test
    @DisplayName("Should handle null message")
    void testNullMessage() {
        // When/Then
        assertDoesNotThrow(() -> {
            CIFSException exception = new CIFSException((String) null);
            assertNotNull(exception);
        });
    }

    @Test
    @DisplayName("Should handle null cause")
    void testNullCause() {
        // When/Then
        assertDoesNotThrow(() -> {

 */
@DisplayName("Credentials Interface Tests")
class CredentialsTest extends BaseTest {

    @Mock
    private Credentials mockCredentials;

    @Test
    @DisplayName("Should define interface methods")
    void testCredentialsInterface() {
        // Verify interface methods exist
        assertDoesNotThrow(() -> {
            mockCredentials.unwrap(Credentials.class);
            mockCredentials.getUserDomain();

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  public void testComputeIfAbsent_nullKeySupported() {
    getMap()
        .computeIfAbsent(
            null,
            k -> {
              assertNull(k);
              return v3();
            });
    expectAdded(entry(null, v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testComputeIfAbsent_functionThrows() {
    assertThrows(

          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }
      return outputFuture;
    }
  }

  public void testFutureGetThrowsFunctionException() throws Exception {
    inputFuture.set(EXCEPTION_DATA);
    listener.assertException(EXCEPTION);
  }

  public void testFutureGetThrowsCancellationIfInputCancelled() throws Exception {
    inputFuture.cancel(true); // argument is ignored

          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }
      return outputFuture;
    }
  }

  public void testFutureGetThrowsFunctionException() throws Exception {
    inputFuture.set(EXCEPTION_DATA);
    listener.assertException(EXCEPTION);
  }

  public void testFutureGetThrowsCancellationIfInputCancelled() throws Exception {
    inputFuture.cancel(true); // argument is ignored