* #hashCode()} to forward to this implementation.
   *
   * @since 7.0
   */
  protected int standardHashCode() {
    K k = getKey();
    V v = getValue();
    return ((k == null) ? 0 : k.hashCode()) ^ ((v == null) ? 0 : v.hashCode());
  }

  /**
   * A sensible definition of {@link #toString} in terms of {@link #getKey} and {@link #getValue}.

    @Test
    void testGetResults() {
        // Test the getResults method
        // By default, it should return null until results are set
        assertNull(response.getResults());
    }

    @Test
    void testGetLastName() {
        // Test the getLastName method
        // By default, it should return null
        assertNull(response.getLastName());
    }

    @Test
    void testGetSubCommand() {

        // Then
        assertNotNull(result);
        assertEquals("", result);
    }

    @Test
    @DisplayName("Should handle null byte array")
    void testToHexStringNull() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            Hexdump.toHexString(null);
        });
    }

    @Test
    @DisplayName("Should convert byte array to hex string with offset and length")

        if (path == null || path.isEmpty()) {
            // TODO This replacing shouldn't be necessary as user.home should be in the
            // context of the container and thus the value would be interpolated by Plexus
            String basedir = System.getProperty(basedirSysProp);
            if (basedir == null) {
                basedir = System.getProperty("user.dir");
            }

                mvnArgs.add("-Daether.remoteRepositoryFilter.prefixes=false");
                mvnArgs.add(goal);
                int exitCode = -1;
                Exception exception = null;
                try {
                    exitCode = invoker.invoke(
                            parser.parseInvocation(ParserRequest.mvn(mvnArgs, new JLineMessageBuilderFactory())

    }

    @Override
    public List<MavenProject> getDownstreamProjects(MavenProject project, boolean transitive) {
        Objects.requireNonNull(project, "project cannot be null");

        Set<String> projectIds = new HashSet<>();

        getDownstreamProjects(ProjectSorter.getId(project), projectIds, transitive);

        return getSortedProjects(projectIds);
    }

                                "anyOf": [{"type": "string"}, {"type": "null"}],
                            },
                            "client_secret": {
                                "title": "Client Secret",
                                "anyOf": [{"type": "string"}, {"type": "null"}],
                            },
                        },
                    },

      return this;
    }

    @Override
    public Writer append(@Nullable CharSequence csq, int start, int end) {
      checkPositionIndexes(start, end, csq == null ? "null".length() : csq.length());
      return this;
    }

    @Override
    public Writer append(char c) {
      return this;
    }

    @Override
    public void flush() {}

 * [newFixedLengthSource(0)][newFixedLengthSource] and may skip reading and closing that source.
 */
class Http1ExchangeCodec(
  /** The client that configures this stream. May be null for HTTPS proxy tunnels. */
  private val client: OkHttpClient?,
  override val carrier: ExchangeCodec.Carrier,
  override val socket: BufferedSocket,
) : ExchangeCodec {
  private var state = STATE_IDLE

        for (int dialect : dialects) {
            assertTrue(dialect >= 0x0300);
        }
    }

    @Test
    @DisplayName("Should handle null maximum version")
    void testNullMaximumVersion() {
        // Given
        when(mockConfig.getMaximumVersion()).thenReturn(null);

        // When/Then - Should throw NPE based on actual implementation
        assertThrows(NullPointerException.class, () -> {