try {
            systemHelper.setLogLevel("DEBUG");
            assertEquals("DEBUG", systemHelper.getLogLevel());
            systemHelper.setLogLevel("INFO");
            assertEquals("INFO", systemHelper.getLogLevel());
            systemHelper.setLogLevel("WARN");
            assertEquals("WARN", systemHelper.getLogLevel());
            systemHelper.setLogLevel("ERROR");

        List<FileNotifyInformation> notifications = response.getNotifyInformation();
        assertEquals(1, notifications.size());

        FileNotifyInformation info = notifications.get(0);
        assertEquals(1, info.getAction());
        assertEquals("test.txt", info.getFileName());
    }

    @Test
    @DisplayName("Should read multiple notifications from wire format")
    void testReadMultipleNotifications() throws Exception {

        assertEquals("test warn message", events.get(0).getMessage());
    }

    @Test
    public void test_append_infoEvent() {
        final LogEvent event = createLogEvent(Level.INFO, "org.codelibs.fess.test", "test info message");
        appender.append(event);

        final List<LogNotificationEvent> events = ComponentUtil.getLogNotificationHelper().drainAll();
        assertEquals(0, events.size());
    }

        // Create and execute a file crawler
        crawlLabelId = createCrawlLabel();

        createFileConfig();
        logger.info("FileConfig is created");
        refresh();
        fileConfigId = getFileConfigIds(NAME_PREFIX).get(0);

        createJob();
        logger.info("Job is created");
        refresh();

        startJob(NAME_PREFIX);
        waitJob(NAME_PREFIX);
        refresh();
    }

{* ../../docs_src/additional_responses/tutorial001_py310.py hl[18,22] *}

/// note

Keep in mind that you have to return the `JSONResponse` directly.

///

/// info

The `model` key is not part of OpenAPI.

**FastAPI** will take the Pydantic model from there, generate the JSON Schema, and put it in the correct place.

The correct place is:

{* ../../docs_src/additional_responses/tutorial001_py310.py hl[18,22] *}

/// note | Nota

Ten en cuenta que debes devolver el `JSONResponse` directamente.

///

/// info | Información

La clave `model` no es parte de OpenAPI.

**FastAPI** tomará el modelo de Pydantic de allí, generará el JSON Schema y lo colocará en el lugar correcto.

El lugar correcto es:

            "name": "The Baz"
        }
    ]
}
```

/// info

Notice how the `images` key now has a list of image objects.

///

## Deeply nested models { #deeply-nested-models }

You can define arbitrarily deeply nested models:

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

{* ../../docs_src/events/tutorial002_py310.py hl[6] *}

Тут функція-обробник події `shutdown` запише текстовий рядок `"Application shutdown"` у файл `log.txt`.

/// info | Інформація

У функції `open()` параметр `mode="a"` означає «append», тож рядок буде додано після всього, що є у файлі, без перезапису попереднього вмісту.

///

/// tip | Порада

     * dependency injection is complete.
     */
    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {
            logger.info("Loaded {}", this.getClass().getSimpleName());
        }
        dictionaryManager.addCreator(this);
    }

    /**
     * Creates a new {@link SynonymFile} instance.
     *

# Form Models { #form-models }

You can use **Pydantic models** to declare **form fields** in FastAPI.

/// info

To use forms, first install [`python-multipart`](https://github.com/Kludex/python-multipart).

Make sure you create a [virtual environment](../virtual-environments.md), activate it, and then install it, for example:

```console
$ pip install python-multipart
```

///

/// note