return try {
    val (major, minor, _) = ideaVersionString.split(".", limit = 3)
    KotlinVersion(major.toInt(), minor.toInt()) < KotlinVersion(2023, 2)
  } catch (e: Exception) {
    false // Unknown version, presumably compatible.
  }

   * compatible connection specs are available.
   */
  internal fun nextConnectionSpec(
    connectionSpecs: List<ConnectionSpec>,
    sslSocket: SSLSocket,
  ): ConnectPlan? {
    for (i in connectionSpecIndex + 1 until connectionSpecs.size) {
      if (connectionSpecs[i].isCompatible(sslSocket)) {

    assertThat("localhost".toCanonicalHost()).isEqualTo("localhost")
    assertThat("☃.net".toCanonicalHost()).isEqualTo("xn--n3h.net")

    // IPv4 Compatible or Mapped addresses
    assertThat("::192.168.0.1".toCanonicalHost()).isEqualTo("::c0a8:1")
    assertThat("::FFFF:192.168.0.1".toCanonicalHost()).isEqualTo("192.168.0.1")

 *
 * Each test is a line of the file `urltestdata.txt`. The format is informally specified by its
 * JavaScript parser `urltestparser.js` with which this class attempts to be compatible.
 *
 * Each line of the `urltestdata.txt` file specifies a test. Lines look like this:
 *
 * ```
 * http://example\t.\norg http://example.org/foo/bar s:http h:example.org p:/
 * ```
 */

    supported on Android, Java, or Conscrypt.

    We removed this cipher suite and `TLS_AES_128_CCM_SHA256` from the restricted, modern, and
    compatible sets of cipher suites. These two cipher suites aren't enabled by default in either
    Firefox or Chrome.

    See our [TLS Configuration History][tls_configuration_history] tracker for a log of all changes

    crashed.

 *  Fix: Avoid `InetAddress.getCanonicalHostName()` in MockWebServer. This avoids problems if the
    host machine's IP address has additional DNS registrations.

 *  New: Create a JPMS-compatible artifact for `JavaNetCookieJar`. Previously, multiple OkHttp
    artifacts defined classes in the `okhttp3` package, but this is forbidden by the Java module

import okhttp3.internal.ws.WebSocketProtocol.PAYLOAD_SHORT
import okhttp3.internal.ws.WebSocketProtocol.toggleMask
import okio.Buffer
import okio.BufferedSource
import okio.ByteString

/**
 * An [RFC 6455][rfc_6455]-compatible WebSocket frame reader.
 *
 * This class is not thread safe.
 *
 * [rfc_6455]: http://tools.ietf.org/html/rfc6455
 */
class WebSocketReader(
  private val isClient: Boolean,
  val source: BufferedSource,

        .build()
        .routeDatabase,
    )
    assertNotSame(
      client.routeDatabase,
      client.newBuilder()
        .connectionSpecs(listOf(ConnectionSpec.COMPATIBLE_TLS))
        .build()
        .routeDatabase,
    )
    assertNotSame(
      client.routeDatabase,
      client.newBuilder()
        .proxySelector(proxySelector)
        .build()

    connectionSpec = ConnectionSpec.COMPATIBLE_TLS
    connectionSpec = ConnectionSpec.CLEARTEXT
    val tlsVersions: List<TlsVersion>? = connectionSpec.tlsVersions
    val cipherSuites: List<CipherSuite>? = connectionSpec.cipherSuites
    val supportsTlsExtensions: Boolean = connectionSpec.supportsTlsExtensions
    val compatible: Boolean =
      connectionSpec.isCompatible(

      SSLProtocolException::class.java,
      // Android's response to the FAIL_HANDSHAKE:
      SSLHandshakeException::class.java,
    )
    assertThat(client.connectionSpecs).doesNotContain(ConnectionSpec.COMPATIBLE_TLS)
  }

  @Test
  fun recoverFromTlsHandshakeFailure() {
    platform.assumeNotBouncyCastle()

    server.useHttps(handshakeCertificates.sslSocketFactory())