}
    }

    public void test_exceptionInheritance() {
        // Test exception inheritance hierarchy
        CommandExecutionException exception = new CommandExecutionException("Test");

        // Check inheritance chain
        assertTrue(exception instanceof CommandExecutionException);
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);

    }

    public void test_serialization() {
        // Test that the exception has proper serialVersionUID
        DataStoreException exception = new DataStoreException("Serialization test");

        // Check that it's a RuntimeException and can be thrown
        try {
            throw exception;
        } catch (DataStoreException e) {
            assertEquals("Serialization test", e.getMessage());

        BehaviorExceptionThrower thrower2 = invokerAssistant.assistBehaviorExceptionThrower();
        assertNotSame(thrower1, thrower2);
    }

    // Helper method to check if array contains a value
    private boolean containsValue(String[] array, String value) {
        for (String element : array) {
            if (element.equals(value)) {
                return true;
            }

    //                                                                              ======
    @Override
    protected int delegateSelectCountUniquely(final ConditionBean cb) {
        // #pending check response and cast problem
        final SearchRequestBuilder builder = client.prepareSearch(asEsIndex());
        final EsAbstractConditionBean esCb = (EsAbstractConditionBean) cb;
        if (esCb.getPreference() != null) {

            // Test with concrete implementation
            assertDoesNotThrow(() -> concreteImplementation.replaceCache());
        }

        @Test
        @DisplayName("Should check if resolve hashes")
        void testIsResolveHashes() {
            // Test with mock
            when(mockReferralData.isResolveHashes()).thenReturn(true);
            assertTrue(mockReferralData.isResolveHashes());

// information in IAM (i.e sys.iam*Map) - this info is stored only in the STS
// generated credentials. Thus we skip looking up group memberships, user map,
// and group map and check the appropriate policy maps directly.
func (c *iamCache) policyDBGet(store *IAMStoreSys, name string, isGroup bool, policyPresent bool) ([]string, time.Time, error) {
	if isGroup {

        assertNotNull(exception.getCause());
        assertEquals(middleCause, exception.getCause());
        assertEquals("Processing failed", exception.getCause().getMessage());

        // Check nested cause
        Throwable nestedCause = exception.getCause().getCause();
        assertNotNull(nestedCause);
        assertEquals(innerCause, nestedCause);

## Parámetros opcionales

De la misma manera, puedes declarar parámetros de query opcionales, estableciendo su valor por defecto en `None`:

{* ../../docs_src/query_params/tutorial002_py310.py hl[7] *}

/// check | Revisa

Además, nota que **FastAPI** es lo suficientemente inteligente para notar que el parámetro de path `item_id` es un parámetro de path y `q` no lo es, por lo tanto, es un parámetro de query.

///

{* ../../docs_src/path_operation_configuration/tutorial005.py hl[21] *}

/// info | 정보

`response_description`은 구체적으로 응답을 지칭하며, `description`은 일반적인 *경로 작동*을 지칭합니다.

///

/// check | 확인

OpenAPI는 각 *경로 작동*이 응답에 관한 설명을 요구할 것을 명시합니다.

따라서, 응답에 관한 설명이 없을경우, **FastAPI**가 자동으로 "성공 응답" 중 하나를 생성합니다.

///

<img src="/img/tutorial/path-operation-configuration/image03.png">

## 단일 *경로 작동* 지원중단

{* ../../docs_src/query_params/tutorial002_py310.py hl[7] *}

Nesse caso, o parâmetro da função `q` será opcional, e `None` será o padrão.

/// check | Verificar

Você também pode notar que o **FastAPI** é esperto o suficiente para perceber que o parâmetro da rota `item_id` é um parâmetro da rota, e `q` não é, portanto, `q` é o parâmetro de consulta.

///