// When
        encryptionContext.secureWipeKeys();

        // Then - Verify keys are wiped (we can't directly access private fields,
        // but we can verify the context behaves correctly after wiping)
        // After wiping, operations that require keys should fail

    }

    /**
     * Verify that root causes are stored and returned correctly.
     */
    @Test
    @DisplayName("Root cause propagation")
    void testRootCausePropagation() {
        Throwable root = mock(Throwable.class);
        SmbException ex = new SmbException(0, root);
        assertSame(root, ex.getRootCause());
    }

    /**

        // Verify lengths
        assertEquals(2, setupWritten);
        assertEquals(6, paramWritten);
        assertEquals(56, dataWritten); // 50 + 6 padding

        // Verify setup content
        assertEquals(SmbComTransaction.TRANS2_SET_FILE_INFORMATION, setupBuffer[0]);
        assertEquals(0x00, setupBuffer[1]);

        // Verify parameter content

                } else {
                    // If delete fails, at least verify copy succeeded
                    log.warn("Could not delete source after copy, but continuing");
                    deleted = true; // Proceed anyway
                }
            }
        }

        // Verify results with fresh context
        CIFSContext checkContext = createFreshContext();

    peer.sendFrame().settings(Settings())
    peer.acceptFrame() // ACK
    peer.sendFrame().ping(false, 2, 3)
    peer.acceptFrame() // PING
    peer.play()

    // Play it back.
    connect(peer)

    // Verify the peer received what was expected.
    val ping = peer.takeFrame()
    assertThat(ping.type).isEqualTo(Http2.TYPE_PING)
    assertThat(ping.streamId).isEqualTo(0)
    assertThat(ping.payload1).isEqualTo(2)

            throw new CIFSException(String.format("Invalid MIC sequence, expect %d have %d", expectSeq, seq));
        }

        final byte[] verify = new byte[8];
        System.arraycopy(mic, 4, verify, 0, 8);
        if (!MessageDigest.isEqual(trunc, verify)) {
            if (log.isDebugEnabled()) {
                log.debug(String.format("Seq = %d ver = %d encrypted = %s", seq, ver, encrypted));

        assertFalse(filter.accept(mockDir, "image.png"), "Should reject non-.txt files");
        assertFalse(filter.accept(mockDir, null), "Should reject null names");

        // Verify getPath was called three times (once for each accept call)
        verify(mockDir, times(3)).getPath();
        verifyNoMoreInteractions(mockDir);
    }

    /**
     * Defensive behavior: implementation throws NPE on null inputs by design.
     */

        // Verify all methods were called
        verify(mockBasicFileInfo).getAttributes();
        verify(mockBasicFileInfo).getCreateTime();
        verify(mockBasicFileInfo).getLastWriteTime();
        verify(mockBasicFileInfo).getLastAccessTime();
        verify(mockBasicFileInfo).getSize();
        verify(mockBasicFileInfo).getFileInformationLevel();
    }

    @Test

        assertEquals(12345L, size);

        // Verify precise interactions
        verify(mockEntry, times(1)).getName();
        verify(mockEntry, times(2)).getType();
        verify(mockEntry, times(1)).getAttributes();
        verify(mockEntry, times(1)).createTime();
        verify(mockEntry, times(1)).lastModified();
        verify(mockEntry, times(1)).lastAccess();
        verify(mockEntry, times(1)).length();

        ndrLong.decode(mockNdrBuffer);

        // Verify that dec_ndr_long was called exactly once
        verify(mockNdrBuffer, times(1)).dec_ndr_long();
        // Verify that the value field was updated correctly
        assertEquals(decodedValue, ndrLong.value, "Decode should correctly assign the value returned by dec_ndr_long.");
        // Verify that no other interactions occurred with the mock buffer