* accept and which to reject. A reasonable policy is to reject all cookies, though that may
 * interfere with session-based authentication schemes that require cookies.
 *
 * As persistence, implementations of this interface must also provide storage of cookies. Simple
 * implementations may store cookies in memory; sophisticated ones may use the file system or
 * database to hold accepted cookies. The [cookie storage model][rfc_6265_53] specifies policies for

    private val servers = mutableMapOf<String, MockWebServer>()
    private var started = false

    fun server(name: String): MockWebServer {
      return servers.getOrPut(name) {
        MockWebServer().also {
          if (started) it.start()
        }
      }
    }

    fun startAll() {
      started = true
      for (server in servers.values) {
        server.start()
      }
    }

```

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:

```
@JvmField @Rule val serverRule = MockWebServerRule()

    if (tags.isNotEmpty()) {
      (tags as MutableMap).remove(type)
    }
  } else {
    val mutableTags: MutableMap<KClass<*>, Any> =
      when {
        tags.isEmpty() -> mutableMapOf<KClass<*>, Any>().also { tags = it }
        else -> tags as MutableMap<KClass<*>, Any>
      }
    mutableTags[type] = tag
  }
}

fun Request.commonToString(): String =
  buildString {
    append("Request{method=")

@RunWith(AndroidJUnit4::class)
@SdkSuppress(minSdkVersion = 34)
class AndroidHttpEngineTest {
  val context = InstrumentationRegistry.getInstrumentation().context

  val cacheDir =
    context.cacheDir.resolve("httpEngine").also {
      it.mkdirs()
    }
  val engine =
    HttpEngine.Builder(context)
      .setEnableBrotli(true)
      .setStoragePath(cacheDir.path)
      .setEnableHttpCache(HttpEngine.Builder.HTTP_CACHE_DISK, 10_000_000)

import okio.ByteString.Companion.decodeBase64
import okio.ByteString.Companion.toByteString

/**
 * Constrains which certificates are trusted. Pinning certificates defends against attacks on
 * certificate authorities. It also prevents connections through man-in-the-middle certificate
 * authorities either known or unknown to the application's user.
 * This class currently pins a certificate's Subject Public Key Info as described on

     *
     * HTTPS responses also contain SSL session information. This begins with a blank line, and then
     * a line containing the cipher suite. Next is the length of the peer certificate chain. These
     * certificates are base64-encoded and appear each on their own line. The next line contains the
     * length of the local certificate chain. These certificates are also base64-encoded and appear

   * For example, the tags in this schema are 0 and 1:
   *
   * ```
   * Point ::= SEQUENCE {
   *   x [0] INTEGER OPTIONAL,
   *   y [1] INTEGER OPTIONAL
   * }
   * ```
   *
   * You may also specify a tag class like [DerHeader.TAG_CLASS_APPLICATION]. The default tag class
   * is [DerHeader.TAG_CLASS_CONTEXT_SPECIFIC].
   *
   * ```
   * Point ::= SEQUENCE {
   *   x [APPLICATION 0] INTEGER OPTIONAL,

 * the `@Rule` annotation:
 *
 * ```java
 * @Rule public final MockWebServerRule serverRule = new MockWebServerRule();
 * ```
 *
 * For Kotlin the `@JvmField` annotation is also necessary:
 *
 * ```kotlin
 * @JvmField @Rule val serverRule = MockWebServerRule()
 * ```
 */
@ExperimentalOkHttpApi
class MockWebServerRule : ExternalResource() {
  val server: MockWebServer = MockWebServer()

  @Test
  fun readIndexedHeaderFieldIndex0() {
    bytesIn.writeByte(0x80) // == Indexed - Add idx = 0
    assertFailsWith<IOException> {
      hpackReader!!.readHeaders()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("index == 0")
    }
  }

  // Example taken from twitter/hpack DecoderTest.testIllegalIndex
  @Test
  fun readIndexedHeaderFieldTooLargeIndex() {