val mediaType = parse("text/plain; charset=utf-8; charset=utf-16")
    assertEquals("UTF-8", mediaType.charsetName())
  }

  /**
   * This is invalid according to RFC 822. But it's what Chrome does and it avoids a potentially
   * unpleasant IllegalCharsetNameException.
   */
  @Test fun testCharsetNameIsSingleQuoted() {
    val mediaType = parse("text/plain;charset='utf-8'")

        // Test constructor with long strings
        String type = "VeryLongTokenTypeNameForTestingPurposes";
        String message =
                "This is a very long error message that describes in detail why the access token is invalid and what went wrong during validation";
        InvalidAccessTokenException exception = new InvalidAccessTokenException(type, message);

        assertEquals(type, exception.getType());

 * `::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.
 *
 * This test only runs on host machines that have both IPv4 and IPv6 addresses for localhost.
 */
@Timeout(30)
class FastFallbackTest {
  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

        // Test that custom sessionId is sanitized
        Crawler.Options options = new Crawler.Options();
        options.sessionId = "test-session-123";

        // Simulate what process() does - sanitize sessionId
        if (options.sessionId != null) {
            options.sessionId = options.sessionId.replaceAll("-", "_");
        }

# JSON Lines をストリームする { #stream-json-lines }

データのシーケンスを**「ストリーム」**で送りたい場合、**JSON Lines** を使って実現できます。

/// info | 情報

FastAPI 0.134.0 で追加されました。

///

## ストリームとは { #what-is-a-stream }

データを**ストリーミング**するとは、アイテムの全シーケンスが用意できるのを待たずに、アプリがデータアイテムの送信をクライアントに対して開始することを意味します。

つまり、最初のアイテムを送信し、クライアントはそれを受け取って処理を始めます。その間に、次のアイテムをまだ生成しているかもしれません。

```mermaid
sequenceDiagram
    participant App
    participant Client

     * code may someday upset Error Prone. We want the test, though, in case that changes in the
     * future, so we will suppress any such future Error Prone reports.
     */
    assertWithMessage(
            "Can't test the main listenInPoolThread path "
                + "if the input is already a ListenableFuture")
        .that(input)
        .isNotInstanceOf(ListenableFuture.class);

        // Save original config
        FessConfig originalConfig = ComponentUtil.getFessConfig();

        try {
            // Use existing config from setUp and just override what we need to test
            queryFieldConfig = new QueryFieldConfig() {
                @Override
                public void init() {
                    super.init();

    // Find the longest-idle connections in 2 categories:
    //
    //  1. OLD: Connections that have been idle for at least keepAliveDurationNs. We close these if
    //     we find them, regardless of what the address policies need.
    //
    //  2. EVICTABLE: Connections not required by any address policy. This matches connections that
    //     don't participate in any policy, plus connections whose policies won't be violated if the

         * InterruptibleChannel and JavaLangAccess.blockedOn(Thread, Interruptible), it isn't
         * predictable what work might be done. (e.g., close a file and flush buffers to disk). To
         * protect ourselves from this, we park ourselves and tell our interrupter that we did so.
         */
        if (state == PARKED || compareAndSet(state, PARKED)) {
          // Interrupting Cow Says:
          //  ______

    require(length < bytesOut.size - lastFrame.start)

    // Move everything from bytesOut into a new buffer.
    val fullBuffer = Buffer()
    bytesOut.read(fullBuffer, bytesOut.size)

    // Copy back all but what we're truncating.
    fullBuffer.read(bytesOut, lastFrame.start + length)
    outFrames.add(OutFrame(lastFrame.sequence, lastFrame.start, true))
    return writer
  }

  fun takeFrame(): InFrame = inFrames.take()