为此，要在 `with` 语句中使用 `TestClient` 连接 WebSocket。

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

/// note | 笔记

更多细节详见 <a href="https://www.starlette.dev/testclient/#testing-websocket-sessions" class="external-link" target="_blank">Starlette 官档 - 测试 WebSockets</a>。

* <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#responses-object" class="external-link" target="_blank">Объект Responses OpenAPI</a>, он включает `Response Object`.

/**
 * Unit test for {@link AppendableWriter}.
 *
 * @author Alan Green
 */
@NullUnmarked
public class AppendableWriterTest extends IoTestCase {

  /** Helper class for testing behavior with Flushable and Closeable targets. */
  private static class SpyAppendable implements Appendable, Flushable, Closeable {
    boolean flushed;
    boolean closed;
    final StringBuilder result = new StringBuilder();

    @Override

-->

<paramdoc xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 ../../../../../../../maven-plugin-parameter-documenter/target/generated-site/xsd/paramdoc-1.0.0.xsd ">
  <expressions>
    <expression>
      <syntax>localRepository</syntax>
      <configuration>
        <![CDATA[
      Inside ~/.m2/settings.xml:

     * This specialized method returns a Map of users and local groups for the
     * target server where keys are SIDs representing an account and each value
     * is an ArrayList of SIDs represents the local groups that the account is
     * a member of.
     *
     * This method is designed to assist with computing access control for a
     * given user when the target object's ACL has local groups. Local groups

Para producción usarías `fastapi run` en su lugar. 🚀

Internamente, **FastAPI CLI** usa <a href="https://www.uvicorn.dev" class="external-link" target="_blank">Uvicorn</a>, un servidor ASGI de alto rendimiento y listo para producción. 😎

## `fastapi dev` { #fastapi-dev }

Ejecutar `fastapi dev` inicia el modo de desarrollo.

import com.google.errorprone.annotations.RequiredModifiers;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Comparator;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**

{* ../../docs_src/app_testing/tutorial002_py39.py hl[27:31] *}

/// note

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

        printStream.accept("  apply - apply available upgrades");
        printStream.accept("");
        printStream.accept("Options:");
        printStream.accept("  -m, --model-version <version> Target POM model version (4.0.0 or 4.1.0)");
        printStream.accept("  -d, --directory <path> Directory to use as starting point for POM discovery");

Для работы в режиме продакшн вместо `fastapi dev` нужно использовать `fastapi run`. 🚀

Внутри **FastAPI CLI** используется <a href="https://www.uvicorn.dev" class="external-link" target="_blank">Uvicorn</a>, высокопроизводительный, готовый к работе в продакшне ASGI-сервер. 😎

## `fastapi dev` { #fastapi-dev }

Вызов `fastapi dev` запускает режим разработки.