### Validation { #validation }

* Validation for most (or all?) Python **data types**, including:
    * JSON objects (`dict`).
    * JSON array (`list`) defining item types.
    * String (`str`) fields, defining min and max lengths.
    * Numbers (`int`, `float`) with min and max values, etc.

* Validation for more exotic types, like:
    * URL.
    * Email.
    * UUID.
    * ...and others.

            assertNotNull(utf16Bytes, "UTF-16LE bytes should not be null");
            assertTrue(utf8Bytes.length > 0, "UTF-8 bytes should not be empty");
            assertTrue(utf16Bytes.length > 0, "UTF-16LE bytes should not be empty");
            assertNotEquals(utf8Bytes.length, utf16Bytes.length, "Different encodings should produce different lengths");
        }

        @ParameterizedTest

            byte[] actualPathBytes = new byte[expectedPathBytes.length];
            System.arraycopy(dst, 2, actualPathBytes, 0, expectedPathBytes.length);
            assertArrayEquals(expectedPathBytes, actualPathBytes);

            // Check null terminator at the end
            int nullTerminatorIndex = 2 + expectedPathBytes.length;
            assertEquals(0, dst[nullTerminatorIndex]);

            trans2QueryFSInfo.writeDataWireFormat(buffer, 0);
            trans2QueryFSInfo.readSetupWireFormat(buffer, 0, buffer.length);
            trans2QueryFSInfo.readParametersWireFormat(buffer, 0, buffer.length);
            trans2QueryFSInfo.readDataWireFormat(buffer, 0, buffer.length);
        }

        // Object should still be in valid state
        String result = trans2QueryFSInfo.toString();

        int paramWritten = trans2SetFileInfo.writeParametersWireFormat(paramBuffer, 0);
        int dataWritten = trans2SetFileInfo.writeDataWireFormat(dataBuffer, 0);

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

        // Verify setup content

        }

        @ParameterizedTest
        @DisplayName("Should handle various read lengths")
        @ValueSource(ints = { 0, 1, 512, 1024, 4096, 65536, 1048576 })
        void testVariousReadLengths(int length) {
            assertDoesNotThrow(() -> request.setReadLength(length));
        }

        @ParameterizedTest
        @DisplayName("Should handle various offsets")

        // Verify path length
        assertEquals(pathBytes.length, SMBUtil.readInt2(buffer, bodyOffset + 6));

        // Verify path content
        byte[] actualPath = new byte[pathBytes.length];
        System.arraycopy(buffer, bodyOffset + 8, actualPath, 0, pathBytes.length);
        assertArrayEquals(pathBytes, actualPath);
    }

    @Test

        // When
        boolean isError = response.isErrorResponseStatus();

        // Then
        assertFalse(isError);
    }

    @DisplayName("Should handle various data lengths")
    @ParameterizedTest
    @CsvSource({ "0, 0", "1, 10", "100, 200", "512, 1024" })
    void testReadBytesWireFormatVariousDataLengths(int dataLength, int dataRemaining) throws Exception {
        // Given

    }

    @Test
    @DisplayName("length(): delegates to SmbFile.length()")
    void length_delegates() throws Exception {
        SmbRandomAccessFile raf = newInstance("r", false, false, false);
        SmbFile file = (SmbFile) getField(raf, "file");
        when(file.length()).thenReturn(42L);
        assertEquals(42L, raf.length());
    }

    @Test

   * Equivalence}.
   *
   * <p>For example, given an {@link Equivalence} for {@link String strings} named {@code equiv}
   * that tests equivalence using their lengths:
   *
   * {@snippet :
   * equiv.wrap("a").equals(equiv.wrap("b")) // true
   * equiv.wrap("a").equals(equiv.wrap("hello")) // false
   * }
   *