import static com.google.common.collect.testing.Helpers.copyToList;
import static com.google.common.collect.testing.Helpers.copyToSet;
import static java.lang.System.arraycopy;
import static java.util.Arrays.asList;
import static java.util.Collections.frequency;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.fail;

            final Extractor[] existingExtractors = extractorMap.get(key);

            final Extractor[] newExtractors = new Extractor[existingExtractors.length + 1];
            System.arraycopy(existingExtractors, 0, newExtractors, 0, existingExtractors.length);
            newExtractors[newExtractors.length - 1] = extractor;

            Arrays.sort(newExtractors, Comparator.comparingInt(Extractor::getWeight).reversed());

        byte[] tempBuffer = new byte[50];
        original.encode(tempBuffer, 0);

        // Copy only the first 36 bytes (what decode reads)
        byte[] buffer = new byte[36];
        System.arraycopy(tempBuffer, 0, buffer, 0, 36);

        // Decode
        int bytesRead = fileBasicInfo.decode(buffer, 0, 36);

        // Verify
        assertEquals(36, bytesRead);

    }

    @Test
    @DisplayName("Test decode operation")
    void testDecode() {
        byte[] buffer = new byte[1024];
        // Fill with basic SMB header structure
        System.arraycopy(new byte[] { (byte) 0xFF, 'S', 'M', 'B' }, 0, buffer, 0, 4);
        buffer[4] = 1; // wordCount
        buffer[7] = 0; // byteCount low
        buffer[8] = 0; // byteCount high

    array[3] = e4;
    array[4] = e5;
    array[5] = e6;
    array[6] = e7;
    array[7] = e8;
    array[8] = e9;
    array[9] = e10;
    array[10] = e11;
    array[11] = e12;
    System.arraycopy(others, 0, array, 12, others.length);
    return construct(array);
  }

  /**
   * Returns an immutable list containing the given elements, in order. If {@code elements} is a

        try (InputStream stream = cache.getInputStream()) {
            byte[] buffer = new byte[1024];
            int bytesRead = stream.read(buffer);
            byte[] result = new byte[bytesRead];
            System.arraycopy(buffer, 0, result, 0, bytesRead);
            assertArrayEquals(originalData, result);
        }
    }

    @Test
    public void testFileBasedCacheConstructor() throws IOException {

        SessionRequestPacket readPacket = new SessionRequestPacket(mockConfig);
        readPacket.length = written;

        byte[] readBuffer = new byte[256];
        System.arraycopy(buffer, 0, readBuffer, 10, written);

        int bytesRead = readPacket.readTrailerWireFormat(bais, readBuffer, 10);

        assertEquals(written, bytesRead);
    }

    @Test

        byte[] buffer = new byte[200];
        int offset = 50;
        byte[] infoData = createMockFileBasicInfoBuffer();
        System.arraycopy(infoData, 0, buffer, offset, infoData.length);
        response.setDataCount(infoData.length);

        int bytesRead = response.readDataWireFormat(buffer, offset, buffer.length - offset);

                System.arraycopy(this.sbuf, 4, negoReqBuffer, 0, reqLen);
            }

            negotiatePeek();

            r = smb2neg.initResponse(getContext());
            final int respLen = r.decode(this.sbuf, 4);
            r.received();

            if (doPreauth) {
                negoRespBuffer = new byte[respLen];
                System.arraycopy(this.sbuf, 4, negoRespBuffer, 0, respLen);

                byte[] b = invocation.getArgument(0);
                int off = invocation.getArgument(1);
                int l = invocation.getArgument(2);
                System.arraycopy(expectedOutput, 0, b, off, l);
                return l;
            });

            HMACT64 hmac = new HMACT64(TEST_KEY);
            int bytesWritten = hmac.engineDigest(buffer, 0, expectedOutput.length);