when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(false, true); // First false to trigger ensureOpen, then true
        when(mockFileHandle.getFileId()).thenReturn(new byte[16]);
        when(mockFileHandle.acquire()).thenReturn(mockFileHandle);

        // Mock for ensureOpen to reopen file
        when(mockFile.openUnshared(anyInt(), anyInt(), anyInt(), anyInt(), anyInt())).thenReturn(mockFileHandle);

        dstIndex += 4;
        SMBUtil.writeInt8(this.offset, dst, dstIndex);
        dstIndex += 8;
        System.arraycopy(this.fileId, 0, dst, dstIndex, 16);
        dstIndex += 16;
        SMBUtil.writeInt4(this.channel, dst, dstIndex);
        dstIndex += 4;
        SMBUtil.writeInt4(this.remainingBytes, dst, dstIndex);
        dstIndex += 4;

        for (int i = 8; i < 16; i++) {
            assertEquals((byte) 0xFF, dst[i]);
        }

        // Test with zero
        SMBUtil.writeInt8(0L, dst, 16);
        for (int i = 16; i < 24; i++) {
            assertEquals((byte) 0x00, dst[i]);
        }
    }

    @Test
    void testReadTime() {
        byte[] src = new byte[16];

        // Test with zero time

}

// TestHashedLayer - tests the hashed layer which will be returned
// consistently for a given object name.
func TestHashedLayer(t *testing.T) {
	// Test distribution with 16 sets.
	var objs [16]*erasureObjects
	for i := range objs {
		objs[i] = &erasureObjects{}
	}

	sets := &erasureSets{sets: objs[:], distributionAlgo: "CRCMOD"}

	testCases := []struct {
		objectName  string
		expectedObj *erasureObjects
	}{

	SRAWCC R3, R4                   // 7c841e31
	SRD $16, R3, R4                 // 78648402
	SRD R3, R4, R5                  // 7c851c36
	SRDCC R3, R4                    // 7c841c37
	SRAD $16, R3, R4                // 7c648674
	SRAD R3, R4, R5                 // 7c851e34
	SRDCC R3, R4                    // 7c841c37
	ROTLW $16, R3, R4               // 5464803e
	ROTLW R3, R4, R5                // 5c85183e

            hmac.update(this.ntResponse, 0, 16); // only first 16 bytes of ntResponse
            final byte[] userSessionKey = hmac.digest();

            if (getFlag(NTLMSSP_NEGOTIATE_KEY_EXCH)) {
                this.masterKey = new byte[16];
                tc.getConfig().getRandom().nextBytes(this.masterKey);

                final byte[] encryptedKey = new byte[16];
                final Cipher rc4 = Crypto.getArcfour(userSessionKey);

  when {
    isMappedIpv4Address(address) -> address.sliceArray(12 until 16)
    else -> address
  }

/** Returns true for IPv6 addresses like `0000:0000:0000:0000:0000:ffff:XXXX:XXXX`. */
private fun isMappedIpv4Address(address: ByteArray): Boolean {
  if (address.size != 16) return false

  for (i in 0 until 10) {
    if (address[i] != 0.toByte()) return false
  }

        dstIndex += 4;
        SMBUtil.writeInt8(this.offset, dst, dstIndex);
        dstIndex += 8;
        System.arraycopy(this.fileId, 0, dst, dstIndex, 16);
        dstIndex += 16;
        SMBUtil.writeInt4(this.minimumCount, dst, dstIndex);
        dstIndex += 4;
        SMBUtil.writeInt4(this.channel, dst, dstIndex);
        dstIndex += 4;

        dstIndex += 4;

        // Padding to align data to 8-byte boundary
        dstIndex += 4;

        // Write lease V1 data (32 bytes total)
        leaseKey.encode(dst, dstIndex); // LeaseKey (16 bytes)
        dstIndex += 16;

        SMBUtil.writeInt4(leaseState, dst, dstIndex); // LeaseState (4 bytes)
        dstIndex += 4;

        SMBUtil.writeInt4(leaseFlags, dst, dstIndex); // LeaseFlags (4 bytes)

	}

	// Tests hashing order to be consistent.
	for i, testCase := range testCases {
		hashedOrder := hashOrder(testCase.objectName, 16)
		if !reflect.DeepEqual(testCase.hashedOrder, hashedOrder) {
			t.Errorf("Test case %d: Expected \"%v\" but failed \"%v\"", i+1, testCase.hashedOrder, hashedOrder)
		}
	}