// Valid inputs: each known code must map to its documented message
        assertEquals(expectedMessage, lookupMessage(code).orElse(null));
    }

    @ParameterizedTest
    @ValueSource(ints = { -1, Integer.MIN_VALUE, Integer.MAX_VALUE })
    @DisplayName("Unknown codes: lookup returns empty Optional")
    void lookup_returns_empty_for_unknown_codes(int unknownCode) {

        assertEquals(1, SMBUtil.readInt2(buffer, 10));
    }

    /**
     * Test that a large file lock (bit 0x10 set) is encoded and decoded correctly.
     */
    @ParameterizedTest
    @ValueSource(ints = { 0x10, 0x11 })
    void largeFileFlagSet_and_decoded_according_to_type(int type) throws Exception {
        Configuration cfg = mock(Configuration.class);
        SmbComLockingAndX cmd = new SmbComLockingAndX(cfg);

        // Then
        assertEquals(0, bytesWritten);
    }

    @DisplayName("Should write zero bytes at various offsets")
    @ParameterizedTest
    @ValueSource(ints = { 0, 1, 10, 50, 100, 255 })
    void testWriteBytesWireFormatAtDifferentOffsets(int offset) {
        // Given
        byte[] buffer = new byte[256];

        // When

import com.google.common.base.CharMatcher;
import com.google.common.base.MoreObjects;
import com.google.common.hash.Hashing;
import com.google.common.io.ByteStreams;
import com.google.common.primitives.Ints;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.math.BigInteger;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.primitives.Ints;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.errorprone.annotations.concurrent.LazyInit;
import com.google.j2objc.annotations.WeakOuter;
import java.io.IOException;

    } else {
      return next >>> 1;
    }
  }

  public void testCrc32cStrideTable() {
    int next = CRC32C_GENERATOR_FLIPPED;
    for (int i = 0; i < 12; i++) { // for 3 ints = 12 bytes in between each stride window
      next = (next >>> 8) ^ Crc32cHashFunction.Crc32cHasher.byteTable[next & 0xFF];
    }
    int[][] expected = new int[4][256];
    for (int b = 0; b < 4; ++b) {

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @ParameterizedTest
        @DisplayName("Should mask input values with 0xFF correctly")
        @ValueSource(ints = { 0, 1, 127, 128, 255, 256, -1, -128, -255, -256, 32767, -32768, 65535, 65536 })
        void testConstructorMasking(int inputValue) {
            // Given: An input value
            // When: Creating NdrShort with that value

     * CRC(A000A000A000...), CRC(0B000B000B...), CRC(00C000C000C...), CRC(000D000D000D...)
     * and then to XOR them together.  The strideTable enables us to hash an int followed by 12
     * zero bytes (3 ints), while the byteTable is for advancing one byte at a time.
     * This algorithm is due to the paper "Everything we know about CRC but [are] afraid to forget"
     * by Kadatch and Jenkins, 2010.
     */

    Crc32cHasher() {

        assertEquals(0, info.getAction());
        assertNull(info.getFileName());
    }

    @DisplayName("Test readParametersWireFormat with various file actions")
    @ParameterizedTest
    @ValueSource(ints = { FileNotifyInformation.FILE_ACTION_ADDED, FileNotifyInformation.FILE_ACTION_REMOVED,
            FileNotifyInformation.FILE_ACTION_MODIFIED, FileNotifyInformation.FILE_ACTION_RENAMED_OLD_NAME,

        void testDialectAny() {
            assertEquals(0x02FF, Smb2Constants.SMB2_DIALECT_ANY, "SMB dialect ANY must be 0x02FF");
        }

        @ParameterizedTest
        @ValueSource(ints = { 0x0202, 0x0210, 0x0300, 0x0302, 0x0311 })
        @DisplayName("All specific dialects should be greater than or equal to SMB 2.0.2")
        void testDialectVersionProgression(int dialect) {