```Python
q: Union[str, None] = Query(default=None, max_length=50)
```

Cela va valider les données, montrer une erreur claire si ces dernières ne sont pas valides, et documenter le paramètre dans le schéma `OpenAPI` de cette *path operation*.

## Rajouter plus de validation

Vous pouvez aussi rajouter un second paramètre `min_length` :

{* ../../docs_src/query_params_str_validations/tutorial003.py hl[9] *}

     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }

    /** The IDs of label types associated with this file configuration. */
    public String[] labelTypeIds;

    /** The CRUD operation mode for this form. */
    @ValidateTypeFailure
    public Integer crudMode;

    /** The name of the file configuration (required, maximum 200 characters). */
    @Required
    @Size(max = 200)

        assertNull(exception.getCause());
    }

    public void test_constructorWithMessageAndCause() {
        // Test constructor with message and cause
        String message = "Storage operation failed";
        Exception cause = new RuntimeException("Underlying error");
        StorageException exception = new StorageException(message, cause);

        assertNotNull(exception);

     *
     * @return minimum size in bytes for compression to be beneficial
     */
    int getMinCompressionSize();

    /**
     * Gets the maximum data size that can be compressed in a single operation.
     *
     * @return maximum size in bytes that can be compressed
     */
    int getMaxCompressionSize();

    /**
     * Gets a human-readable name for the compression algorithm.
     *

## Використання `BackgroundTasks`

Спочатку імпортуйте `BackgroundTasks` і додайте його як параметр у Вашу *функцію операції шляху* (path operation function) до `BackgroundTasks`:

{* ../../docs_src/background_tasks/tutorial001.py hl[1,13] *}

**FastAPI** автоматично створить об'єкт `BackgroundTasks` і передасть його у цей параметр.


## Створення функції задачі

    @Override
    public void setUp() throws Exception {
        super.setUp();
        pingSearchEngineJob = new PingSearchEngineJob();
    }

    // Test normal operation with GREEN status and state change
    public void test_execute_greenStatusNoChange() {
        // Setup mock components
        SearchEngineClient searchEngineClient = new SearchEngineClient() {
            @Override

                    // Missing trailing slash -> should complain about directory ending
                    Arguments.of("smb://server/share", "/share", true),
                    // Not a server root -> invalid list operation
                    Arguments.of("smb://server/share/", "/share/", false));
        }

        @ParameterizedTest(name = "invalid path: {0}")
        @MethodSource("invalidShareEnumCases")

indent 12 }} {{- with .Values.nodeSelector }} nodeSelector: {{ toYaml . | indent 8 }} {{- end }} {{- include "minio.imagePullSecrets" . | indent 6 }} {{- with .Values.affinity }} affinity: {{ toYaml . | indent 8 }} {{- end }} {{- with .Values.tolerations }} tolerations: {{ toYaml . | indent 8 }} {{- end }} volumes: - name: export {{- if .Values.persistence.enabled }} persistentVolumeClai: claimName: {{ .Values.persistence.existingClaim | default (include "minio.fullname" .) }} {{- else }} emptyDir: {}...

indent 12 }} {{- with .Values.nodeSelector }} nodeSelector: {{ toYaml . | indent 8 }} {{- end }} {{- include "minio.imagePullSecrets" . | indent 6 }} {{- with .Values.affinity }} affinity: {{ toYaml . | indent 8 }} {{- end }} {{- with .Values.tolerations }} tolerations: {{ toYaml . | indent 8 }} {{- end }} volumes: - name: export {{- if .Values.persistence.enabled }} persistentVolumeClai: claimName: {{ .Values.persistence.existingClaim | default (include "minio.fullname" .) }} {{- else }} emptyDir: {}...

indent 12 }} {{- with .Values.nodeSelector }} nodeSelector: {{ toYaml . | indent 8 }} {{- end }} {{- include "minio.imagePullSecrets" . | indent 6 }} {{- with .Values.affinity }} affinity: {{ toYaml . | indent 8 }} {{- end }} {{- with .Values.tolerations }} tolerations: {{ toYaml . | indent 8 }} {{- end }} volumes: - name: export {{- if .Values.persistence.enabled }} persistentVolumeClai: claimName: {{ .Values.persistence.existingClaim | default (include "minio.fullname" .) }} {{- else }} emptyDir: {}...