*
 * This test includes tests from [Guava's](https://code.google.com/p/guava-libraries/)
 * MediaTypeTest.
 */
open class MediaTypeTest {
  open fun MediaType.charsetName(): String? = parameter("charset")?.uppercase()

  protected open fun parse(string: String): MediaType = string.toMediaTypeOrNull()!!

  protected open fun assertInvalid(
    string: String,
    exceptionMessage: String?,
  ) {

import java.net.ServerSocket
import javax.net.ServerSocketFactory

/**
 * A [ServerSocketFactory] that delegates calls. Sockets can be configured after creation by
 * overriding [.configureServerSocket].
 */
open class DelegatingServerSocketFactory(private val delegate: ServerSocketFactory) : ServerSocketFactory() {
  @Throws(IOException::class)
  override fun createServerSocket(): ServerSocket {

    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

    client = TestClient(app)
    with path.open("rb") as file, path2.open("rb") as file2:
        response = client.post(
            "/files/",
            files=(
                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),

    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

    client = TestClient(app)
    with path.open("rb") as file, path2.open("rb") as file2:
        response = client.post(
            "/files/",
            files=(
                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),

   * request bodies.
   */
  open fun peek(): MockResponse {
    return MockResponse(socketPolicy = KeepOpen)
  }

  /**
   * Release any resources held by this dispatcher. Any requests that are currently being dispatched
   * should return immediately. Responses returned after shutdown will not be transmitted: their
   * socket connections have already been closed.
   */
  open fun shutdown() {}

                }
            ]
        }
    )


def test_post_file(tmp_path):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")

    client = TestClient(app)
    with path.open("rb") as file:
        response = client.post("/files/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"file_size": 14}


def test_post_large_file(tmp_path):

          labels-to-remove-when-unstale: 'stat:awaiting response'
          only-labels: "stat:awaiting response"
          stale-issue-message: > 
            This issue is stale because it has been open for 7 days with no activity.
            It will be closed if no further activity occurs. Thank you.
          close-issue-message: >

import java.net.InetAddress
import java.net.Socket
import javax.net.SocketFactory

/**
 * A [SocketFactory] that delegates calls. Sockets can be configured after creation by
 * overriding [.configureSocket].
 */
open class DelegatingSocketFactory(private val delegate: SocketFactory) : SocketFactory() {
  @Throws(IOException::class)
  override fun createSocket(): Socket {
    val socket = delegate.createSocket()

```Python hl_lines="1  13"
{!../../../docs_src/events/tutorial003.py!}
```

Um **gerenciador de contexto** em Python é algo que você pode usar em uma declaração `with`, por exemplo, `open()` pode ser usado como um gerenciador de contexto:

```Python
with open("file.txt") as file:
    file.read()
```

Nas versões mais recentes de Python, há também um **gerenciador de contexto assíncrono**. Você o usaria com `async with`:

```Python

/**
 * Manages reuse of HTTP and HTTP/2 connections for reduced network latency. HTTP requests that
 * share the same [Address] may share a [Connection]. This class implements the policy
 * of which connections to keep open for future use.
 *
 * @constructor Create a new connection pool with tuning parameters appropriate for a single-user
 * application. The tuning parameters in this pool are subject to change in future OkHttp releases.