}

    @Test
    @DisplayName("accept: propagates SmbException thrown by dependency")
    void accept_propagatesSmbException() throws Exception {
        // Arrange: filter delegates to isDirectory which may throw SmbException
        SmbFileFilter filter = f -> f.isDirectory();
        SmbException boom = new SmbException("io error");
        when(smbFile.isDirectory()).thenThrow(boom);

class CredentialsInternalTest {

    @Mock
    CIFSContext mockContext;

    /**
     * Simple in-test implementation of CredentialsInternal to exercise the API surface.
     * It validates inputs, records calls, and delegates some behavior to collaborators
     * so we can verify interactions.
     */
    static class TestCredentials implements CredentialsInternal {
        private final String domain;
        private final boolean anonymous;

        assertThrows(NullPointerException.class, () -> {
            LogStream.setInstance(null);
        });
    }

    @Test
    void testPrintStreamDelegation() {
        // Test that LogStream properly delegates to underlying PrintStream
        // Use a real PrintStream with ByteArrayOutputStream to test delegation
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PrintStream realStream = new PrintStream(baos);

    void testGettersAndState() {
        SmbSessionImpl session = newSession();

        // Basic getters
        assertSame(configuration, session.getConfig(), "getConfig delegates to transportContext");
        assertEquals("EXAMPLE", session.getTargetDomain());
        assertEquals("server.example", session.getTargetHost());
        assertTrue(session.isInUse(), "New session starts in-use (usageCount=1)");

  /** Constructor for use by subclasses. */
  protected ForwardingSortedMultiset() {}

  @Override
  protected abstract SortedMultiset<E> delegate();

  @Override
  public NavigableSet<E> elementSet() {
    return delegate().elementSet();
  }

  /**
   * A sensible implementation of {@link SortedMultiset#elementSet} in terms of the following

@J2ktIncompatible
@GwtIncompatible
@SuppressWarnings("GoodTime") // should have java.time.Duration overloads
public interface TimeLimiter {

  /**
   * Returns an instance of {@code interfaceType} that delegates all method calls to the {@code
   * target} object, enforcing the specified time limit on each call. This time-limited delegation
   * is also performed for calls to {@link Object#equals}, {@link Object#hashCode}, and {@link

        assertEquals(expected, result);
        verify(locator, times(1)).shouldForceSigning();
        verifyNoMoreInteractions(locator);
    }

    // Happy path: overlaps delegates to implementation and returns as stubbed
    @Test
    @DisplayName("overlaps returns true then false as stubbed")
    void overlapsReturnsTrueThenFalse() throws Exception {

        // Then
        assertTrue(smb2Only, "Should delegate SMB2 only negotiation");
        assertFalse(secureNegotiate, "Should delegate secure negotiate requirement");
        assertTrue(ntlmTargetName, "Should delegate NTLM target name setting");
        assertFalse(port139Failover, "Should delegate port 139 failover setting");
        assertTrue(dfsStrictView, "Should delegate DFS strict view setting");

        assertEquals(16 + clientData.length, result.length);
        assertArrayEquals(clientData, Arrays.copyOfRange(result, 16, 16 + clientData.length));
    }

    @Test
    @DisplayName("getLMv2Response(byte[]): delegates to computeResponse")
    void testGetLMv2Response_bytes_delegates() {
        // Arrange
        byte[] key = hex("000102030405060708090A0B0C0D0E0F");
        byte[] server = hex("0102030405060708");

        properties.put("Accept", Collections.singletonList("application/json"));
        when(mockConnection.getRequestProperties()).thenReturn(properties);
        // Need to mock getRequestProperty as well since it delegates to wrapped connection
        when(mockConnection.getRequestProperty("Accept")).thenReturn("application/json");

        // Act
        ntlmConnection = new NtlmHttpURLConnection(mockConnection, mockCifsContext);