private val cookieManager = CookieManager()
  private lateinit var server: MockWebServer

  @BeforeEach
  fun setUp(server: MockWebServer) {
    this.server = server

    platform.assumeNotOpenJSSE()
    server.protocolNegotiationEnabled = false
    val loggingFileSystem = LoggingFilesystem(fileSystem)

 * They don't specify whether a specific proxy server should be used or how to authenticate with that proxy server.

They're also concrete: each URL identifies a specific path (like `/square/okhttp`) and query (like `?q=sharks&lang=en`). Each webserver hosts many URLs.

    )
  val bodyResponse = MockResponse(body = "body")

  @BeforeEach
  fun setUp(
    server: MockWebServer,
    @MockWebServerInstance("server2") server2: MockWebServer,
  ) {
    this.server1 = server
    this.server2 = server2

    socketFactory = SpecificHostSocketFactory(InetSocketAddress(server.hostName, server.port))

    client =
      clientTestRule.newClientBuilder()
        .dns(dns)

OkHttp Server-Sent Events
=========================

Experimental support for server-sent events.
API is not considered stable and may change at any time.

### Download

```kotlin
testImplementation("com.squareup.okhttp3:okhttp-sse:4.12.0")

   *
   * @throws IOException if the request could not be executed due to cancellation, a connectivity
   *     problem or timeout. Because networks can fail during an exchange, it is possible that the
   *     remote server accepted the request before the failure.
   * @throws IllegalStateException when the call has already been executed.
   */
  @Throws(IOException::class)
  fun execute(): Response

  /**

/**
 * This test binds two different web servers (IPv4 and IPv6) to the same port, but on different
 * local IP addresses. Requests made to `127.0.0.1` will reach the IPv4 server, and requests made to
 * `::1` will reach the IPv6 server.
 *
 * By orchestrating two different servers with the same port but different IP addresses, we can
 * test what OkHttp does when both are reachable, or if only one is reachable.
 *

import okhttp3.internal.http2.ConnectionShutdownException
import okhttp3.internal.stripBody
import okio.buffer

/** This is the last interceptor in the chain. It makes a network call to the server. */
class CallServerInterceptor(private val forWebSocket: Boolean) : Interceptor {
  @Throws(IOException::class)
  override fun intercept(chain: Interceptor.Chain): Response {
    val realChain = chain as RealInterceptorChain

    private val protocols: List<String>,
  ) : InvocationHandler {
    /** Set when remote peer notifies ALPN is unsupported. */
    var unsupported: Boolean = false

    /** The protocol the server selected. */
    var selected: String? = null

    @Throws(Throwable::class)
    override fun invoke(
      proxy: Any,
      method: Method,
      args: Array<Any>?,
    ): Any? {

```

Then in tests annotated `@org.junit.Test`, you may declare a field with the `@Rule` annotation:

```
@Rule public final MockWebServerRule serverRule = new MockWebServerRule();
```

The `serverRule` field has a `server` field. It is an instance of `MockWebServer`. That instance
will be shut down automatically after the test runs.

For Kotlin, the `@JvmField` annotation is also necessary:

```

# This should fail
C|/foo/bar  s:file p:/C:/foo/bar

# This should fail
/C|\\foo\\bar  s:file p:/C:/foo/bar
//C|/foo/bar  s:file p:/C:/foo/bar
//server/file  s:file h:server p:/file
\\\\server\\file  s:file h:server p:/file
/\\server/file  s:file h:server p:/file
file:///foo/bar.txt  s:file p:/foo/bar.txt
file:///home/me  s:file p:/home/me
//  s:file p:/
///  s:file p:/
///test  s:file p:/test