from typing import Optional


def say_hi(name: Optional[str]):

def say_hi(name: str | None = None):
    if name is not None:
        print(f"Hey {name}!")
    else:

        module.say_hi("FastAPI")
        module.say_hi()

    assert mock_print.call_count == 2
    call_args = [arg.args for arg in mock_print.call_args_list]
    assert call_args == [
        ("Hey FastAPI!",),
        ("Hello World",),

    return mod


def test_say_hi(module: ModuleType):
    with patch("builtins.print") as mock_print:
        module.say_hi("FastAPI")

    mock_print.assert_called_once_with("Hey FastAPI!")

    with pytest.raises(
        TypeError,
        match=re.escape("say_hi() missing 1 required positional argument: 'name'"),
    ):

## OpenAPI 客户端生成

有许多工具可以从**OpenAPI**生成客户端。

一个常见的工具是 <a href="https://openapi-generator.tech/" class="external-link" target="_blank">OpenAPI Generator</a>。

如果您正在开发**前端**，一个非常有趣的替代方案是 <a href="https://github.com/hey-api/openapi-ts" class="external-link" target="_blank">openapi-ts</a>。

## 生成一个 TypeScript 前端客户端

让我们从一个简单的 FastAPI 应用开始：

{* ../../docs_src/generate_clients/tutorial001_py39.py hl[7:9,12:13,16:17,21] *}

  }

  @Test
  fun encodeMultiplePairs() {
    val body =
      FormBody
        .Builder()
        .add("sim", "ple")
        .add("hey", "there")
        .add("help", "me")
        .build()
    val expected = "sim=ple&hey=there&help=me"
    assertThat(body.contentLength()).isEqualTo(expected.length.toLong())
    val buffer = Buffer()
    body.writeTo(buffer)

    assertThat(callbacks.remove()).isEqualTo(Event("1", null, "first event"))
  }

  @Test
  fun retryInvalidFormatIgnored() {
    consumeEvents(
      """
      |retry: 22
      |
      |retry: hey
      |
      """.trimMargin(),
    )
    assertThat(callbacks.remove()).isEqualTo(22L)
  }

  @Test
  fun namePrefixIgnored() {
    consumeEvents(
      """
      |data: a

  }

  @Test
  fun serverReadsHeadersData() {
    assumeNotWindows()
    enableProtocol(Protocol.HTTP_2)
    val body =
      MockSocketHandler()
        .exhaustResponse()
        .receiveRequest("hey\n")
        .receiveRequest("whats going on\n")
        .exhaustRequest()
    server.enqueue(
      MockResponse
        .Builder()
        .clearHeaders()
        .addHeader("h1", "v1")

---
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---

# FastAPI People

FastAPI has an amazing community that welcomes people from all backgrounds.

## Creator

Hey! 👋

This is me:

<div class="user-list user-list-center">
{% for user in people.maintainers %}

        .addEqualityGroup(ImmutableLongArray.of(1, 2, 3))
        .testEquals();
  }

  /**
   * This is probably a weird and hacky way to test what we're really trying to test, but hey, it
   * caught a bug.
   */
  public void testTrimmed() {
    ImmutableLongArray iia = ImmutableLongArray.of(0, 1, 3);
    assertDoesntActuallyTrim(iia);
    assertDoesntActuallyTrim(iia.subArray(0, 3));