public class BigDecimalConversionUtilTest extends TestCase {
    private static final BigDecimal ZERO = new BigDecimal("0");

    /**
     * @throws Exception
     */
    public void testToBigDecimal() throws Exception {
        assertNull(BigDecimalConversionUtil.toBigDecimal(null));
        assertSame(ZERO, BigDecimalConversionUtil.toBigDecimal(ZERO));

    }

    /**
     * Verify that writeParameterWordsWireFormat writes the file id and the
     * unsigned time correctly.  The last write time is zero which should be
     * encoded as four 0xFF bytes by {@code writeUTime}.
     */
    @ParameterizedTest(name = "fid={0}, lastWriteTime={1}")
    @MethodSource("validParams")

        assertFalse(filter.accept(smbFile), "Negative size should be rejected");
        verify(smbFile, times(1)).length();

        // zero size -> reject
        reset(smbFile);
        when(smbFile.length()).thenReturn(0L);
        assertFalse(filter.accept(smbFile), "Zero size should be rejected");
        verify(smbFile, times(1)).length();

        // positive size -> accept
        reset(smbFile);

    }

    @Test
    @DisplayName("Should initially have zero data length")
    void testInitialDataLength() {
        // Then
        assertEquals(0, response.getDataLength());
    }

    @Test
    @DisplayName("Should initially have zero data remaining")
    void testInitialDataRemaining() {
        // Then
        assertEquals(0, response.getDataRemaining());

    /**
     * Test constructor AvSingleHost(byte[] raw).
     * Should correctly parse the raw bytes.
     */
    @Test
    void testAvSingleHostRawConstructor() {
        byte[] rawData = new byte[48]; // 8 (size/zero) + 8 (customData) + 32 (machineId)
        // Simulate some data
        rawData[0] = 48; // size
        rawData[16] = 0x01; // machineId start
        rawData[17] = 0x02;

    }

    @Test
    @DisplayName("Test bufDataStart not changed when non-zero")
    void testBufDataStartNotChangedWhenNonZero() throws Exception {
        byte[] buffer = new byte[100];
        int bufferIndex = 0;

        // Set bufDataStart to a non-zero value
        Field bufDataStartField = response.getClass().getSuperclass().getSuperclass().getDeclaredField("bufDataStart");

        // Test case 3: Zero value
        int zeroValue = 0;
        NdrLong ndrLongZero = new NdrLong(zeroValue);
        assertEquals(zeroValue, ndrLongZero.value, "Constructor should correctly initialize with zero.");

        // Test case 4: Max int value
        int maxIntValue = Integer.MAX_VALUE;

        // Create channels with zero scores (failed state)
        channel1.setState(ChannelState.FAILED);
        channel2.setState(ChannelState.FAILED);

        when(mockChannelManager.getHealthyChannels()).thenReturn(Arrays.asList(channel1, channel2));

        // Should still select a channel even with zero scores
        ChannelInfo selected = loadBalancer.selectChannel(mockMessage);

        }

        @Test
        @DisplayName("Should initialize count to zero")
        void testInitialCountValue() {
            assertEquals(0, response.getCount());
        }

        @Test
        @DisplayName("Should initialize remaining to zero")
        void testInitialRemainingValue() {
            assertEquals(0, response.getRemaining());
        }
    }

        // informationLevel LE at offset 4..5
        assertEquals((byte) 0x04, buf[4]);
        assertEquals((byte) 0x01, buf[5]);
    }

    /**
     * Ensures writeSetupWireFormat writes subcommand and trailing zero, returning 2.
     */
    @Test
    void testWriteSetupWireFormat() {
        // Given
        Trans2FindNext2 next = new Trans2FindNext2(0x1111, 0, "*");
        byte[] dst = new byte[2];

        // When