// Verify replaceIfExists flag
        assertEquals(1, buffer[0]);

        // Verify file name length
        int nameLength = SMBUtil.readInt4(buffer, 16);
        assertEquals(fileName.getBytes(StandardCharsets.UTF_16LE).length, nameLength);

        // Verify file name
        byte[] nameBytes = new byte[nameLength];
        System.arraycopy(buffer, 20, nameBytes, 0, nameLength);

    assertTrue(sink.wasStreamClosed());
    assertArrayEquals(new byte[] {1, 2, 3, 4}, sink.getBytes());
  }

  public void testWrite_bytes() throws IOException {
    assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
    assertArrayEquals(bytes, sink.getBytes());
  }

  public void testWriteFrom_inputStream() throws IOException {

    assertTrue(sink.wasStreamClosed());
    assertArrayEquals(new byte[] {1, 2, 3, 4}, sink.getBytes());
  }

  public void testWrite_bytes() throws IOException {
    assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
    assertArrayEquals(bytes, sink.getBytes());
  }

  public void testWriteFrom_inputStream() throws IOException {

            if (responseData != null) {
                dataMap.put("url", responseData.getUrl());
            }
            dataMap.put("content", "test content");
            resultData.setData(dataMap.toString().getBytes());
            return resultData;
        }

        @Override
        public String getName() {
            return "TestTransformer";
        }
    }

        String pipeName = "TestPipe";
        FsctlPipeWaitRequest request = new FsctlPipeWaitRequest(pipeName);

        // Verify size calculation
        int expectedSize = 14 + pipeName.getBytes(StandardCharsets.UTF_16LE).length;
        assertEquals(expectedSize, request.size());
    }

    @Test
    @DisplayName("Test constructor with name and timeout sets correct fields")

        descrField.setAccessible(true);
        String descr = (String) descrField.get(null);

        assertEquals("WrLeh\u0000B13BWz\u0000", descr);

        // Verify ASCII conversion
        byte[] descrBytes = descr.getBytes("ASCII");
        assertNotNull(descrBytes);
        assertEquals(13, descrBytes.length); // WrLeh(5) + null(1) + B13BWz(6) + null(1) = 13
    }

    @Test
    @DisplayName("Test writeSetupWireFormat returns 0")

        // Encode the full message to set headerStart
        request.encode(buffer, headerStart);

        // Then - verify the body was written correctly
        byte[] pathBytes = TEST_PATH.getBytes(StandardCharsets.UTF_16LE);

        // Verify structure size (9)
        assertEquals(9, SMBUtil.readInt2(buffer, bodyOffset));

        // Verify tree flags (0)

    }

    @Test
    public void testAsciiEncoding() throws Exception {
        String msg = "\u00A1\u00A2"; // same Unicode string
        byte[] asciiBytes = msg.getBytes(SmbConstants.DEFAULT_OEM_ENCODING);
        assertTrue(asciiBytes.length > 0, "ASCII encoding should produce bytes");
    }

    @Test
    public void testBufferCreation() throws UnsupportedEncodingException {

        assertEquals(0, dst[1]);

        // Verify descriptor (WrLehDO\0B16BBDz\0 in ASCII)
        String expectedDescr = "WrLehDO\u0000B16BBDz\u0000";
        byte[] expectedDescrBytes = expectedDescr.getBytes("ASCII");
        byte[] actualDescrBytes = new byte[expectedDescrBytes.length];
        System.arraycopy(dst, 2, actualDescrBytes, 0, expectedDescrBytes.length);
        assertArrayEquals(expectedDescrBytes, actualDescrBytes);

    assertThat(encoding.encode(decoded.getBytes(UTF_8))).isEqualTo(encoded);
  }

  private static void testEncodesWithOffset(
      BaseEncoding encoding, String decoded, int offset, int len, String encoded) {
    assertThat(encoding.encode(decoded.getBytes(UTF_8), offset, len)).isEqualTo(encoded);
  }