val expectedRequestHeaders =
      listOf(
        Header(Header.TARGET_METHOD, "GET"),
        Header(Header.TARGET_SCHEME, "https"),
        Header(Header.TARGET_AUTHORITY, "squareup.com"),
        Header(Header.TARGET_PATH, "/cached"),
      )
    peer.sendFrame().pushPromise(3, 2, expectedRequestHeaders)
    val expectedResponseHeaders =
      listOf(
        Header(Header.RESPONSE_STATUS, "200"),
      )

        ) {

            assertHasNoInformation()
            assertHasNoWarning()
            assertHasErrors(

                // Kotlin file-facade classes are ignored by the @since rule
                listOf("Class com.example.SourceKt: Is not annotated with @Incubating."),

                added("Field", "cathedral"),
                added("Method", "SourceKt.foo()"),

            parameters.srcDirs.forEach { srcDir ->
                if (srcDir.exists()) {
                    val collector = CompositeVersionsToIncubatingCollector(
                        listOf(
                            JavaVersionsToIncubatingCollector(srcDir),
                            KotlinVersionsToIncubatingCollector()
                        )
                    )

}

/** Returns an immutable copy of this. */
internal fun <T> List<T>.toImmutableList(): List<T> {
  return Collections.unmodifiableList(toMutableList())
}

/** Returns an immutable list containing [elements]. */
@SafeVarargs
internal fun <T> immutableListOf(vararg elements: T): List<T> {
  return Collections.unmodifiableList(listOf(*elements.clone()))
}

/** Closes this, ignoring any checked exceptions. */

   */
  private fun enableProtocol(protocol: Protocol) {
    enableTls()
    client =
      client.newBuilder()
        .protocols(listOf(protocol, Protocol.HTTP_1_1))
        .build()
    server.protocols = client.protocols
  }

  private fun enableTls() {
    client =
      client.newBuilder()
        .sslSocketFactory(

    get() = systemProperty(PREDICTIVE_TEST_SELECTION_ENABLED)
        .map { it.toBoolean() }
        .orElse(
            buildBranch.zip(buildRunningOnCi) { branch, ci ->
                val protectedBranches = listOf("master", "release")
                ci && !protectedBranches.contains(branch)
                    && !branch.startsWith("pre-test/")
                    && !branch.startsWith("gh-readonly-queue/")
            }

      object : BasicDerAdapter.Codec<T> {
        override fun decode(reader: DerReader): T {
          return reader.withTypeHint {
            val list = mutableListOf<Any?>()

            while (list.size < members.size) {
              val member = members[list.size]
              list += member.fromDer(reader)
            }

            if (reader.hasNext()) {

    serverIps = Dns.SYSTEM.lookup(server.hostName)
    dns[server.hostName] = serverIps
    dns["san.com"] = serverIps
    dns["nonsan.com"] = serverIps
    dns["www.wildcard.com"] = serverIps
    dns["differentdns.com"] = listOf()
    val handshakeCertificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(rootCa.certificate)
        .build()
    client =
      clientTestRule.newClientBuilder()

        .throttleBody(2, 100, TimeUnit.MILLISECONDS)
        .socketPolicy(DisconnectDuringResponseBody)
        .build(),
    )
    client =
      client.newBuilder()
        .protocols(listOf<Protocol>(Protocol.HTTP_1_1))
        .readTimeout(Duration.ofMillis(250))
        .build()
    val call =
      client.newCall(
        Request.Builder()
          .url(server.url("/"))
          .build(),

          "[h2_prior_knowledge, http/1.1]",
      )
    }
  }

  @Test
  fun testH2PriorKnowledgeServerDuplicates() {
    try {
      // Treating this use case as user error
      server.protocols = listOf(Protocol.H2_PRIOR_KNOWLEDGE, Protocol.H2_PRIOR_KNOWLEDGE)
      fail<Any>()
    } catch (expected: IllegalArgumentException) {
      assertThat(expected.message).isEqualTo(