testResponseBuffer = new byte[] { 0x05, 0x06, 0x07, 0x08 };
        negotiation = new SmbNegotiation(mockRequest, mockResponse, testRequestBuffer, testResponseBuffer);
    }

    @Test
    @DisplayName("Constructor should properly initialize all fields")
    void testConstructor() {
        // Verify all fields are properly initialized
        assertNotNull(negotiation);
        assertSame(mockRequest, negotiation.getRequest());

        }

        assertTrue("GET method should exist", hasGet);
        assertTrue("POST method should exist", hasPost);
        assertTrue("PUT method should exist", hasPut);
        assertTrue("DELETE method should exist", hasDelete);
        assertTrue("HEAD method should exist", hasHead);
        assertTrue("OPTIONS method should exist", hasOptions);
        assertTrue("TRACE method should exist", hasTrace);

    class ConstantValues {
        @Test
        void successIsZero() {
            assertEquals(0, WinError.ERROR_SUCCESS, "ERROR_SUCCESS should be 0");
        }

        @Test
        void accessDeniedIsFive() {
            assertEquals(5, WinError.ERROR_ACCESS_DENIED, "ERROR_ACCESS_DENIED should be 5");
        }

        @Test
        void knownErrorCodes() {

        assertEquals(0xB, PacConstants.CONSTRAINT_DELEGATIION_TYPE, "CONSTRAINT_DELEGATIION_TYPE should be 0xB");
        assertEquals(0xC, PacConstants.CLIENT_UPN_TYPE, "CLIENT_UPN_TYPE should be 0xC");
        assertEquals(0xD, PacConstants.CLIENT_CLAIMS_TYPE, "CLIENT_CLAIMS_TYPE should be 0xD");
        assertEquals(0xE, PacConstants.DEVICE_INFO_TYPE, "DEVICE_INFO_TYPE should be 0xE");

    class SamrCloseHandleTests {

        @Test
        @DisplayName("Should construct with correct opnum")
        void testConstructorAndOpnum() {
            // When: Creating close handle message
            samr.SamrCloseHandle message = new samr.SamrCloseHandle(mockPolicyHandle);

            // Then: Should have correct opnum and handle
            assertEquals(0x01, message.getOpnum());

        // Should match with same values
        assertTrue(fileInfo.matches(1024L, 1000L, 0x20));

        // Should not match with different size
        assertFalse(fileInfo.matches(2048L, 1000L, 0x20));

        // Should not match with different last modified
        assertFalse(fileInfo.matches(1024L, 2000L, 0x20));

        // Should not match with different attributes

    assertSame(
        "toArray(sameSizeE[]) should return the given array", array, collection.toArray(array));
    expectArrayContentsAnyOrder(createSamplesArray(), array);
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testToArray_rightSizedArray_ordered() {
    E[] array = getSubjectGenerator().createArray(getNumElements());
    assertSame(

  public void testGetOrDefault_present() {
    assertEquals(
        "getOrDefault(present, def) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), v3()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentNullDefault() {
    assertEquals(
        "getOrDefault(present, null) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), null));
  }

        SMBProtocolDowngradeException ex = new SMBProtocolDowngradeException();

        // Assert - message and cause are null
        assertNull(ex.getMessage(), "Default constructor should have null message");
        assertNull(ex.getCause(), "Default constructor should have null cause");

        // Assert - toString shows class name when message is null
        assertEquals(SMBProtocolDowngradeException.class.getName(), ex.toString());

        // Should alternate between channels
        ChannelInfo first = loadBalancer.selectChannel(mockMessage);
        ChannelInfo second = loadBalancer.selectChannel(mockMessage);

        assertNotNull(first);
        assertNotNull(second);
        // Due to round-robin, should get different channels or same order