ajax - 尝试测试异步Dart Ajax HttpRequest时出错

Question

这个问题是这个问题的简化版本:Testing dart ajax HttpRequest

我基本上删除了所有不必要的代码，仅保留了test和HttpRequest.postFormData调用。

问题:测试似乎没有等到Future完成。
测试代码:

# http_report_adapter_test.dart

import "package:test/test.dart";
import 'dart:html';

void main() {

  test("sends an ajax request and acknowledges a 200 response from the server", () {
    var f = HttpRequest.postFormData("http://localhost:4567/errors", { 'hello': 'world'});
    f.then((_) => print("!!!!!!!"));
    return f;
  });

}

根据建议，我return f，测试应该等到Future完成。但是，这是我得到的输出:

~/Work/my_libs/dart/logmaster master$ dtest-d -n "sends an ajax request and acknowledges a 200 response from the server"
00:05 +0 -1: test/http_report_adapter_test.dart: sends an ajax request and acknowledges a 200 response from the server
  [object XMLHttpRequestProgressEvent]
  dart:html                            HttpRequest.postFormData
  http_report_adapter_test.dart 14:25  main.<fn>

  [object XMLHttpRequestProgressEvent]
  dart:html                            HttpRequest.postFormData
  http_report_adapter_test.dart 14:25  main.<fn>

我想我显然误会了一些基本知识。我已经尝试过使用async/await，expectAsync，completion进行此测试的多种变体，但是似乎没有任何效果。将不胜感激任何好的建议。

Answer 1

我认为您想要的是:

  test("sends an ajax request and acknowledges a 200 response from the server", () async {
    await HttpRequest.postFormData("http://localhost:4567/errors", { 'hello': 'world'});

    print("hello!"); // or expect(x, y);
  });