assertTrue(ctx.isMICAvailable(), "MIC available when established + integrity");

            assertTrue(ctx.isSupported(mech1), "mech1 supported");
            assertTrue(ctx.isPreferredMech(mech1), "first supported is preferred");
            assertArrayEquals(new ASN1ObjectIdentifier[] { mech1, mech2 }, ctx.getSupportedMechs(), "supported mechs");

@SuppressLint("NewApi")
@SuppressSignatureCheck
class Android10SocketAdapter : SocketAdapter {
  override fun matchesSocket(sslSocket: SSLSocket): Boolean = SSLSockets.isSupportedSocket(sslSocket)

  override fun isSupported(): Boolean = Companion.isSupported()

  @SuppressLint("NewApi")
  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    try {
      // SSLSocket.getApplicationProtocol returns "" if application protocols values will not

      } catch (_: InvocationTargetException) {
        null
      }
  }

  companion object {
    val Tag = "OkHttp"

    val isSupported: Boolean = isAndroid && Build.VERSION.SDK_INT in 21 until 29

    fun buildIfSupported(): Platform? = if (isSupported) AndroidPlatform() else null
  }

 */
class BouncyCastleSocketAdapter : SocketAdapter {
  override fun matchesSocket(sslSocket: SSLSocket): Boolean = sslSocket is BCSSLSocket

  override fun isSupported(): Boolean = isSupported

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? {
    val s = sslSocket as BCSSLSocket

    return when (val protocol = s.applicationProtocol) {
      null, "" -> null

 * directly.
 */
class ConscryptSocketAdapter : SocketAdapter {
  override fun matchesSocket(sslSocket: SSLSocket): Boolean = Conscrypt.isConscrypt(sslSocket)

  override fun isSupported(): Boolean = isSupported

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    when {
      matchesSocket(sslSocket) -> Conscrypt.getApplicationProtocol(sslSocket)

    if (level == WARN) {
      Log.w(Tag, message, t)
    } else {
      Log.i(Tag, message, t)
    }
  }

  companion object {
    val isSupported: Boolean = isAndroid && Build.VERSION.SDK_INT >= 29

    fun buildIfSupported(): Platform? = if (isSupported) Android10Platform() else null
  }

        // Handles both un-configured and none selected.
        null, "" -> null
        else -> protocol
      }
    } else {
      super.getSelectedProtocol(sslSocket)
    }

  companion object {
    val isSupported: Boolean =
      try {
        // Trigger an early exception over a fatal error, prefer a RuntimeException over Error.
        Class.forName("org.bouncycastle.jsse.provider.BouncyCastleJsseProvider", false, javaClass.classLoader)

    }

    @ParameterizedTest
    @MethodSource("supportedMechs")
    @DisplayName("isSupported returns true for supported OIDs")
    void isSupported_supportedOids(ASN1ObjectIdentifier oid) {
        assertTrue(ctx.isSupported(oid));
        assertTrue(ctx.isPreferredMech(oid));
    }

    @Test
    @DisplayName("isSupported returns false for null/unknown OIDs")
    void isSupported_unknownOrNull() {

        // Handles both un-configured and none selected.
        null, "" -> null
        else -> protocol
      }
    } else {
      super.getSelectedProtocol(sslSocket)
    }

  companion object {
    val isSupported: Boolean =
      try {
        // Trigger an early exception over a fatal error, prefer a RuntimeException over Error.
        Class.forName("org.openjsse.net.ssl.OpenJSSE", false, javaClass.classLoader)

        true

    void testGetSupportedMechs() {
        SpnegoContext ctx = newContext();
        ASN1ObjectIdentifier[] supported = ctx.getSupportedMechs();
        assertNotNull(supported);
        assertEquals(1, supported.length);
        assertEquals(new ASN1ObjectIdentifier("1.3.6.1.5.5.2"), supported[0]);
    }

    @Test
    @DisplayName("isSupported always returns false (prevents nesting)")
    void testIsSupportedAlwaysFalse() {