Question

我正在尝试创建一些简单的单元测试，这是代码：

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'：断言失败：第149行pos 12：'！ _isClosed'不是真的。

经过一些解决方法后，我发现负责的是request.add('hello'.codeUnits)

所以现在我无法将数据添加到HttpClientRequest。任何解决方法？

Answer 1

您使用的是什么版本的Dart？我无法重现你得到的错误。有关此问题的进展，请参阅http://dartbug.com/13293。

但是代码存在许多问题：

BytesBuilder没有addAll方法
使用client.get时，请求的内容长度设置为0
似乎客户端可能在服务器绑定之前连接。

如下所示重写测试使其运行：

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)));
  });
}

dart - HttpClientRequest在添加数据时失败

1 个答案: