writeMedium(frame, 4) // has a 4-byte field
    frame.writeByte(99) // type 99
    frame.writeByte(FLAG_NONE)
    frame.writeInt(expectedStreamId)
    frame.writeInt(111111111) // custom data
    reader.nextFrame(requireSettings = false, BaseTestHandler()) // Should not callback.
  }

  @Test fun onlyOneLiteralHeadersFrame() {
    val sentHeaders = headerEntries("name", "value")
    val headerBytes = literalHeaders(sentHeaders)

      headerTableSizeSetting = 4096,
    )

  @Throws(IOException::class)
  fun readConnectionPreface(handler: Handler) {
    if (client) {
      // The client reads the initial SETTINGS frame.
      if (!nextFrame(true, handler)) {
        throw IOException("Required SETTINGS preface not received")
      }
    } else {
      // The server reads the CONNECTION_PREFACE byte string.

        if (truncated) {
          socket.close()
        }
      } else {
        // read a frame
        val inFrame = InFrame(i, reader)
        reader.nextFrame(false, inFrame)
        inFrames.add(inFrame)
      }
    }
  }

  fun openSocket(): Socket = Socket("localhost", port)

  @Synchronized override fun close() {
    executor.shutdown()

      var streamErrorCode = ErrorCode.INTERNAL_ERROR
      var errorException: IOException? = null
      try {
        reader.readConnectionPreface(this)
        while (reader.nextFrame(false, this)) {
        }
        connectionErrorCode = ErrorCode.NO_ERROR
        streamErrorCode = ErrorCode.CANCEL
      } catch (e: IOException) {
        errorException = e

    assertThat(synStream.headerBlock).isEqualTo(headerEntries("b", "banana"))
    val requestData = peer.takeFrame()
    assertArrayEquals("c3po".toByteArray(), requestData.data)
    val nextFrame = peer.takeFrame()
    assertThat(nextFrame.headerBlock).isEqualTo(headerEntries("e", "elephant"))
  }

  @Test fun clientCreatesStreamAndServerRepliesWithFin() {
    // Write the mocking script.
    peer.sendFrame().settings(Settings())

HSPLokhttp3/internal/http2/Http2Reader;-><init>(Lokio/BufferedSource;Z)V
HSPLokhttp3/internal/http2/Http2Reader;->close()V
HSPLokhttp3/internal/http2/Http2Reader;->lengthWithoutPadding(III)I
HSPLokhttp3/internal/http2/Http2Reader;->nextFrame(ZLokhttp3/internal/http2/Http2Reader$Handler;)Z
HSPLokhttp3/internal/http2/Http2Reader;->readConnectionPreface(Lokhttp3/internal/http2/Http2Reader$Handler;)V

        String expectedNextName = "SERVER15";
        when(mockAddress.nextCalledName(mockContext)).thenReturn(expectedNextName);

        // When
        String nextName = mockAddress.nextCalledName(mockContext);

        // Then
        assertEquals(expectedNextName, nextName, "Should return next called name");
        // Note: nextCalledName can return null when no more names available
    }