// Then
            assertEquals(443, httpsPort);
            assertEquals(80, httpPort);
            assertNotEquals(httpsPort, httpPort);
        }
    }

    @Nested
    @DisplayName("Edge Cases")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle reflection access to protected method")
        void testProtectedMethodAccess() throws Exception {
            // Given

/**
 * Tests for SMBProtocolDowngradeException covering all constructors and behaviors.
 */
@ExtendWith(MockitoExtension.class)
class SMBProtocolDowngradeExceptionTest {

    /**
     * Provides messages including edge cases (null and empty) for parameterized testing.
     */
    static Stream<Arguments> messages() {
        return Stream.of(Arguments.of((String) null), Arguments.of(""), Arguments.of("unexpected downgrade"));
    }

        assertSame(handle, handle.unwrap(SmbPipeHandle.class), "unwrap should return same instance for interface type");
    }

    @ParameterizedTest
    @DisplayName("getPipeType echoes constructor input (edge values)")
    @ValueSource(ints = { 0, SmbPipeResource.PIPE_TYPE_RDONLY, SmbPipeResource.PIPE_TYPE_WRONLY, SmbPipeResource.PIPE_TYPE_DCE_TRANSACT })
    void getPipeTypeEchoesInput(int pipeType) throws Exception {

        verify(mockAllocInfo, times(1)).getCapacity();
        verify(mockAllocInfo, times(1)).getFree();
    }

    /**
     * Parameterised test of capacity values, including edge cases such as
     * zero and negative capacities.
     */
    @ParameterizedTest
    @ValueSource(longs = { 0L, -1L, Long.MAX_VALUE })
    @DisplayName("capacity may be any long value")

    }

    /**
     * When lastWriteTime is zero the encoded unsigned time must be all 1s.
     */
    @Test
    @DisplayName("edge: writeParameterWordsWireFormat with lastWriteTime=0")
    void testWriteParameterWordsZeroUTime() {
        SmbComClose close = new SmbComClose(42, 0L);
        byte[] buffer = new byte[6];

            // Then
            assertEquals(443, httpsPort);
            assertEquals(80, httpPort);
            assertNotEquals(httpsPort, httpPort);
        }
    }

    @Nested
    @DisplayName("Edge Cases")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle reflection access to protected method")
        void testProtectedMethodAccess() throws Exception {
            // Given

            assertNotNull(msg);
            assertTrue(msg instanceof samr.SamrConnect2);
            assertTrue(msg instanceof DcerpcMessage);
        }
    }

    @Nested
    @DisplayName("Edge case handling")
    class EdgeCases {

        @Test
        @DisplayName("should handle null system name")
        void testNullSystemNameDoesNotThrow() {
            // Arrange

        // SmbException default ctor leaves status 0, which equals NT_STATUS_SUCCESS
        assertEquals(NtStatus.NT_STATUS_SUCCESS, ex.getNtStatus(), "Default status should be success (0)");
    }

    // Edge/null/empty: message-only constructor should propagate message and set unsuccessful status
    @ParameterizedTest
    @NullSource

  }

  private static boolean isProxyOfSameInterfaces(Object arg, Class<?> proxyClass) {
    return proxyClass.isInstance(arg)
        // Equal proxy instances should mostly be instance of proxyClass
        // Under some edge cases (such as the proxy of JDK types serialized and then deserialized)
        // the proxy type may not be the same.
        // We first check isProxyClass() so that the common case of comparing with non-proxy objects

 *     #from(ValueGraph)}.
 * @since 20.0
 */
@Beta
public final class ValueGraphBuilder<N, V> extends AbstractGraphBuilder<N> {

  /** Creates a new instance with the specified edge directionality. */
  private ValueGraphBuilder(boolean directed) {
    super(directed);
  }

  /** Returns a {@link ValueGraphBuilder} for building directed graphs. */