```JSON
{
  "detail": "Item not found"
}
```

/// tip | Consejo

Cuando lanzas un `HTTPException`, puedes pasar cualquier valor que pueda convertirse a JSON como el parámetro `detail`, no solo `str`.

Podrías pasar un `dict`, un `list`, etc.

Son manejados automáticamente por **FastAPI** y convertidos a JSON.

     *
     * @param crudMode the CRUD mode for the operation
     * @param id the ID of the scheduled job to display
     * @return HTML response for the job details page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse details(final int crudMode, final String id) {
        verifyCrudMode(crudMode, CrudMode.DETAILS);
        saveToken();

    assertThrows(NoSuchElementException.class, iter::next);
    assertThrows(NoSuchElementException.class, iter::peek);
  }


  @J2ktIncompatible // weak references, details of GC
  @GwtIncompatible // weak references
  @AndroidIncompatible // depends on details of GC
  public void testFreesNextReference() {
    Iterator<Object> itr =
        new AbstractIterator<Object>() {
          @Override

            form.crudMode = CrudMode.DETAILS;
            return asDetailsHtml();
        }
        form.crudMode = CrudMode.EDIT;
        return asEditHtml();
    }

    // ----------------------------------------------------
    //                                               Details
    //                                               -------
    /**
     * Show the details page.
     * @param crudMode The CRUD mode.

    //                                               Details
    //                                               -------
    /**
     * Displays the details of a role item.
     *
     * @param crudMode the CRUD mode for the operation
     * @param id the ID of the role item to display
     * @return HTML response for the details page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })

     *
     * @param dictId the dictionary ID
     * @param crudMode the CRUD operation mode
     * @param id the synonym item ID
     * @return HTML response for the synonym item details
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse details(final String dictId, final int crudMode, final long id) {
        verifyCrudMode(crudMode, CrudMode.DETAILS, dictId);

        return statusCode;
    }

    /**
     * Constructs a WebApiException with the specified status code, message, and cause.
     *
     * @param statusCode The HTTP status code
     * @param message The detail message
     * @param cause The cause of this exception
     */
    public WebApiException(final int statusCode, final String message, final Throwable cause) {
        super(message, cause);

        mockName = new Name(mockConfig, "DOMAIN", 0x1B, null); // Domain Master Browser
        NbtAddress nbtAddress = new NbtAddress(mockName, testAddressInt, false, NbtAddress.H_NODE);
        assertEquals(NbtAddress.SMBSERVER_NAME, nbtAddress.firstCalledName());

        mockName = new Name(mockConfig, "DOMAIN", 0x1C, null); // Domain Controller

You can use the same `TestClient` to test WebSockets.

For this, you use the `TestClient` in a `with` statement, connecting to the WebSocket:

{* ../../docs_src/app_testing/tutorial002.py hl[27:31] *}

/// note

For more details, check Starlette's documentation for <a href="https://www.starlette.io/testclient/#testing-websocket-sessions" class="external-link" target="_blank">testing WebSockets</a>.

     *
     * @param crudMode the CRUD mode for the operation
     * @param id the ID of the request header item to display
     * @return HTML response for the details page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse details(final int crudMode, final String id) {
        verifyCrudMode(crudMode, CrudMode.DETAILS);
        saveToken();