while (true) {
      when (source.select(options)) {
        in 0..2 -> {
          completeEvent(id, type, data)
          return true
        }

        in 3..4 -> {
          source.readData(data)
        }

        in 5..7 -> {
          data.writeByte('\n'.code) // 'data' on a line of its own.
        }

        in 8..9 -> {
          id = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }

        // Verify content
        try (InputStream in = file.getInputStream()) {
            byte[] readData = in.readAllBytes();
            assertArrayEquals(data, readData, "File content should match");
        }
    }

    @Test
    void testSimpleMultipleFiles() throws Exception {

	c.inStream.Range(func(key uint64, client *muxServer) bool {
		client.cancel()
		return true
	})
	c.inStream.Clear()
}

func (c *Connection) receive(conn net.Conn, r receiver) error {
	b, op, err := wsutil.ReadData(conn, c.side)
	if err != nil {
		return err
	}
	if op != ws.OpBinary {
		return fmt.Errorf("unexpected connect response type %v", op)
	}
	if c.incomingBytes != nil {
		c.incomingBytes(int64(len(b)))