@DisplayName("Should handle exception when getting challenge")
        void testGetChallengeException() throws CIFSException {
            // Given
            when(transportPool.getChallenge(context, address)).thenThrow(new CIFSException("Failed to get challenge"));

            // When & Then
            assertThrows(CIFSException.class, () -> transportPool.getChallenge(context, address));
        }
    }

    @Nested

    void testCreateResponse() {
        // When
        Smb2ChangeNotifyResponse response = request.createResponse(mockContext, request);

        // Then
        assertNotNull(response);
        assertTrue(response instanceof Smb2ChangeNotifyResponse);
    }

    @Test
    @DisplayName("Should calculate correct size")
    void testSize() {
        // When
        int size = request.size();

            buffer.putInt(512); // Bytes per sector
            byte[] bufferArray = buffer.array();

            // When
            int bytesConsumed = fileFsSizeInfo.decode(bufferArray, 0, bufferArray.length);

            // Then
            assertEquals(24, bytesConsumed);
            assertEquals(1048576L * 8 * 512, fileFsSizeInfo.getCapacity());

**FastAPI** will **extract** the data for **each field** from the **form data** in the request and give you the Pydantic model you defined.

## Check the Docs { #check-the-docs }

You can verify it in the docs UI at `/docs`:

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## Forbid Extra Form Fields { #forbid-extra-form-fields }

        // Given
        when(mockTreeHandle.isSMB2()).thenReturn(true);
        when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(false, true);
        when(mockFileHandle.getFileId()).thenReturn(new byte[16]);
        when(mockFileHandle.acquire()).thenReturn(mockFileHandle);

Now, if you generate the client again, you will see that it has the improved method names:

<img src="/img/tutorial/generate-clients/image07.png">

As you see, the method names now have the tag and then the function name, now they don't include information from the URL path and the HTTP operation.

### Preprocess the OpenAPI Specification for the Client Generator { #preprocess-the-openapi-specification-for-the-client-generator }

            int negativeValue = -1;
            NdrShort ndrShort = new NdrShort(0);
            when(mockBuffer.dec_ndr_short()).thenReturn(negativeValue);

            // When: Decoding the value
            ndrShort.decode(mockBuffer);

            // Then: Should set the negative value directly (no masking on decode)
            verify(mockBuffer).dec_ndr_short();

    public void testConstructorWithNullConfig() {
        // When & Then - should throw NullPointerException since ServerMessageBlock calls config.getPid()
        NullPointerException exception = assertThrows(NullPointerException.class, () -> {
            smbComTreeDisconnect = new SmbComTreeDisconnect(null);
        });

        // Verify the exception message indicates the config is null

        void testDefaultConstructor() {
            // When
            Handler testHandler = new Handler();

            // Then
            assertNotNull(testHandler);
        }

        @Test
        @DisplayName("Should extend jcifs.smb1.http.Handler")
        void testInheritance() {
            // Then
            assertTrue(handler instanceof jcifs.smb1.http.Handler);

        byte[] dst = new byte[2];

        // When
        int bytesWritten = trans.writeSetupWireFormat(dst, 0);

        // Then
        assertEquals(2, bytesWritten, "Should write 2 bytes.");
        assertEquals(SmbComTransaction.TRANS2_QUERY_PATH_INFORMATION, dst[0], "The first byte should be the subCommand.");
        assertEquals((byte) 0x00, dst[1], "The second byte should be 0.");
    }

    /**