It is just a standard function that can receive parameters.

It can be an `async def` or normal `def` function, **FastAPI** will know how to handle it correctly.

In this case, the task function will write to a file (simulating sending an email).

And as the write operation doesn't use `async` and `await`, we define the function with normal `def`:

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

import org.codelibs.fess.unit.UnitFessTestCase;

public class RequestParameterTest extends UnitFessTestCase {

    public void test_constructor_withValidNameAndValues() {
        // Test with normal name and values
        String name = "paramName";
        String[] values = { "value1", "value2", "value3" };
        RequestParameter param = new RequestParameter(name, values);

        assertEquals(name, param.getName());

{* ../../docs_src/dependencies/tutorial006_an_py39.py hl[10,15] *}

### Valores de retorno

Y pueden devolver valores o no, los valores no serán usados.

Así que, puedes reutilizar una dependencia normal (que devuelve un valor) que ya uses en otro lugar, y aunque el valor no se use, la dependencia será ejecutada:

{* ../../docs_src/dependencies/tutorial006_an_py39.py hl[11,16] *}

{* ../../docs_src/app_testing/tutorial001.py hl[2,12,15:18] *}

/// tip

Notice that the testing functions are normal `def`, not `async def`.

And the calls to the client are also normal calls, not using `await`.

This allows you to use `pytest` directly without complications.

///

/// note | Technical Details

     * and delegates to the view helper's action hook.
     *
     * @param runtime the action runtime context
     * @return the action response, or null to continue with normal processing
     */
    @Override
    public ActionResponse godHandPrologue(final ActionRuntime runtime) {
        fessLoginAssist.getSavedUserBean().ifPresent(u -> {

 * {@link SmbException#getStatusByCode(int)}.
 */
@DisplayName("SmbAuthException Tests")
class SmbAuthExceptionTest {

    /**
     * Provides a set of error codes covering normal, edge and unknown cases.
     */
    static Stream<Arguments> errorCodes() {
        return Stream.of(
                // Known NT status code - NT_STATUS_UNSUCCESSFUL

        // Test default max reading num
        assertEquals(10, converter.getMaxReadingNum());
    }

    @Test
    public void testInitNormal() throws IOException {
        // Test normal initialization
        converter.init();
        assertTrue(testConverter.isInitialized());
    }

    @Test
    public void testInitMultipleTimes() throws IOException {
        // Test multiple initialization calls

    private static final Logger log = LoggerFactory.getLogger(WitnessClient.class);

    // Polling and backoff constants (in ms)
    private static final long MAX_POLL_INTERVAL = 5000; // Normal polling: max 5 seconds
    private static final long MAX_ERROR_BACKOFF = 30000; // Error polling: max 30 seconds
    private static final long BASE_POLL_INTERVAL = 1000;
    private static final long BASE_ERROR_DELAY = 1000;

# GraphQL { #graphql }

As **FastAPI** is based on the **ASGI** standard, it's very easy to integrate any **GraphQL** library also compatible with ASGI.

You can combine normal FastAPI *path operations* with GraphQL on the same application.

/// tip

**GraphQL** solves some very specific use cases.

It has **advantages** and **disadvantages** when compared to common **web APIs**.

Isso significa que no lugar do processo normal de seus usuários enviarem requisições para a sua API, é a **sua API** (ou sua aplicação) que poderia **enviar requisições para o sistema deles** (para a API deles, a aplicação deles).

Isso normalmente é chamado de **webhook**.