try {
                while (used == 0) {
                    lock.wait();
                }
            } catch (final InterruptedException ie) {
                throw new IOException(ie.getMessage());
            }
            result = pipe_buf[beg_idx] & 0xFF;
            beg_idx = (beg_idx + 1) % pipe_buf.length;
        }
        return result;
    }

    @Override

        String malformedUrl = "invalid-url";
        CIFSException thrown = assertThrows(CIFSException.class, () -> {
            cifsContextWrapper.get(malformedUrl);
        });
        assertTrue(thrown.getMessage().contains("Invalid URL"));
        assertTrue(thrown.getCause() instanceof MalformedURLException);
    }

    @Test
    void testGetPipe() throws CIFSException, MalformedURLException {

            byte[] actualBuffer = (byte[]) outputBufferField.get(response);
            assertSame(outputBuffer, actualBuffer);
        } catch (Exception e) {
            fail("Failed to access outputBuffer field: " + e.getMessage());
        }
    }

    @Test
    void testWriteSetupWireFormat() {
        // Test that writeSetupWireFormat returns 0
        byte[] dst = new byte[100];

        PACDecodingException e =
                assertThrows(PACDecodingException.class, () -> PacMac.calculateMac(PacSignature.KERB_CHECKSUM_HMAC_MD5, keys, TEST_DATA));
        assertEquals("Missing key", e.getMessage());
    }

    /**
     * Test calculateMac with an invalid algorithm type.
     */
    @Test
    void testCalculateMacInvalidAlgorithm() {
        Map<Integer, KerberosKey> keys = new HashMap<>();

        when(smbFile.isDirectory()).thenThrow(boom);

        // Act + Assert
        SmbException thrown = assertThrows(SmbException.class, () -> filter.accept(smbFile));
        assertEquals("io error", thrown.getMessage());
        verify(smbFile, times(1)).isDirectory();
        verifyNoMoreInteractions(smbFile);
    }

    @Test
    @DisplayName("accept: rejects null input with meaningful NullPointerException")

        // Invalid first byte should be rejected by token parsing
        CIFSException ex = assertThrows(CIFSException.class, () -> ctx.initSecContext(new byte[] { firstByte }, 0, 1));
        assertEquals("Invalid token", ex.getMessage());

        // Ensure mechContext was not engaged due to early failure
        verify(this.mechContext, never()).initSecContext(any(), anyInt(), anyInt());
    }

    @Test

                if (e.getCause() instanceof org.eclipse.aether.transfer.ArtifactNotFoundException) {
                    throw new ArtifactNotFoundException(e.getMessage(), artifact, remoteRepositories, e);
                } else {
                    throw new ArtifactResolutionException(e.getMessage(), artifact, remoteRepositories, e);
                }
            }

            artifact.selectVersion(result.getArtifact().getVersion());

        // When & Then: Constructor should throw SmbException
        SmbException exception = assertThrows(SmbException.class, () -> new NetServerEnumIterator(parent, treeHandle, "*", 0, null));

        assertTrue(exception.getMessage().contains("invalid"));
        verify(treeHandle, never()).acquire();
    }

    @Test
    @DisplayName("Constructor should handle null parent")
    void testConstructor_NullParent_ThrowsNPE() {

        try {
            validator.validatePath("\\share\\forbidden\\file.txt");
            fail("Should block blacklisted path");
        } catch (SmbException e) {
            assertTrue(e.getMessage().contains("not allowed"));
        }

        // Should allow other paths
        String allowed = validator.validatePath("\\share\\allowed\\file.txt");
        assertEquals("\\share\\allowed\\file.txt", allowed);

      SignedBytes.checkedCast(value);
      fail("Cast to byte should have failed: " + value);
    } catch (IllegalArgumentException ex) {
      assertWithMessage(value + " not found in exception text: " + ex.getMessage())
          .that(ex.getMessage().contains(String.valueOf(value)))
          .isTrue();
    }
  }

  public void testCompare() {
    for (byte x : VALUES) {
      for (byte y : VALUES) {