test('chat stream', () async {
    OpenAI.baseUrl = "https://api.openai.com";
    OpenAI.apiKey = "sk-**********";
    var createStream =
        OpenAI.instance.chat.createStream(model: "gpt-3.5-turbo", messages: [
      OpenAIChatCompletionChoiceMessageModel(
          role: OpenAIChatMessageRole.user,
          content: [
            OpenAIChatCompletionChoiceMessageContentItemModel.text("Hi!")
          ])
    ]);

    final completer = Completer<bool>();
    // Count the number of calls
    var count = 0;
    // Merge results
    var assistant = "";
    createStream.listen((event) {
      count++;
      final content = event.choices.first.delta.content;
      if (content != null) {
        assistant = assistant + content.first!.text!;
      }
    }, onDone: () {
      completer.complete(true);
      print(assistant);
      print(count);
    });
    await completer.future;
  });