dart - HttpClientRequest无法添加数据 [英] dart - HttpClientRequest failing on adding data

问题描述

我想创建一些简单的单元测试，这里是代码：

I'm trying to create some simple unittests, here's the code:

import 'dart:io';

import 'package:unittest/unittest.dart';

void main() {
  test('check if sent data equals expected data', () {

    HttpServer.bind('127.0.0.1', 8080)
      .then(expectAsync1((HttpServer server) {
        server.listen((HttpRequest request) {
          expect(request.runtimeType.toString(), equals('_HttpRequest'));
          request.fold(new BytesBuilder(), (prev, next) {
            prev.addAll(next);
            return prev;
          })
          .then(expectAsync1((BytesBuilder bb) {
            var bytes = bb.takeBytes(),
                helloString = new String.fromCharCodes(bytes);
            expect(helloString, equals('hello'));
            request.response.write(helloString);
            request.response.close();
            server.close();
          }));
        });
      }));

    HttpClient client = new HttpClient();
    client.get('127.0.0.1', 8080, '/')
      .then((HttpClientRequest request) {
        request.add('hello'.codeUnits);
        return request.close();
      });

  });
}

给我一​​个错误：打破异常：'dart：async / stream_impl。 dart'：失败断言：line 149 pos 12：'！ _isClosed'不是真的。

Gives me an error: Breaking on exception: 'dart:async/stream_impl.dart': Failed assertion: line 149 pos 12: '! _isClosed' is not true.

一些解决方法后，我发现负责的是 request.add（'hello'.codeUnits） / code>

After some workaround, I found out that the responsible one is request.add('hello'.codeUnits)

现在我无法向 HttpClientRequest 添加数据。任何解决方法？

So now I have no way to add data to HttpClientRequest. Any workaround?

推荐答案

您使用什么版本的Dart？我没有能够重现你得到的错误。有关此问题的进度，请参见 http://dartbug.com/13293 。

What version of Dart are you using? I have not been able to reproduce the error you get. See http://dartbug.com/13293 for progress on this issue.

但是代码有很多问题：

1. BytesBuilder没有addAll方法


2. 使用client.get时请求的内容长度设置为0


3. 看起来客户端可能在服务器绑定之前连接。

重写下面的测试运行：

import 'dart:io';
import 'package:unittest/unittest.dart';

void main() {
  test('check if sent data equals expected data', () {
    expect(HttpServer.bind('127.0.0.1', 8081).then((HttpServer server) {
      HttpClient client = new HttpClient();
      server.listen((HttpRequest request) {
        expect(request.runtimeType.toString(), equals('_HttpRequest'));
        request.fold(new BytesBuilder(), (prev, next) {
          prev.add(next);
          return prev;
        }).then((BytesBuilder bb) {
          var bytes = bb.takeBytes();
          var helloString = new String.fromCharCodes(bytes);
          expect(helloString, equals('hello'));
          request.response.write(helloString);
          request.response.close();
          server.close();
        });
      });

      return client.post('127.0.0.1', 8081, '/').then((HttpClientRequest request) {
        request.add('hello'.codeUnits);
        return request.close().then((HttpClientRequest response) {
          return response.statusCode;
        });
      }).whenComplete(client.close());
    }), completion(equals(HttpStatus.OK)));
  });
}

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