final List<String> sides = split(line, "=>");
                if (sides.size() > 1) { // explicit mapping
                    if (sides.size() != 2) {
                        throw new DictionaryException("more than one explicit mapping specified on the same line");
                    }
                    final List<String> inputStrings = split(sides.get(0), ",");

    server.listener.assertClosed(1000, "Hello!")
  }

  @Test
  @Throws(Exception::class)
  fun clientAndServerCloseClosesConnection() {
    // Send close from both sides at the same time.
    server.webSocket!!.close(1000, "Hello!")
    client.processNextFrame() // Read close, close connection close.
    assertThat(client.closed).isFalse()
    client.webSocket!!.close(1000, "Hi!")