HttpClient＆unittest

Question

通用的新功能Dart，单元测试和异步编程。和StackOverflow，就此而言。尝试围绕shelf_route构建RESTful服务器并使用HttpClient对其进行测试。

我的测试工作，但他们不会自行退出。相反，我必须手动终止该过程。我尝试了几种我在网上找到的方法，但没有运气。任何人都可以帮我一把吗？这里就是我的工作：

import 'dart:io'; 
import 'package:unittest/unittest.dart'; 
import 'package:shelf/shelf.dart' as shelf; 
import 'package:shelf/shelf_io.dart' as io; 
import 'package:toner_track/handlers.dart'; 
import 'package:toner_track/config.dart'; 

void main() { 
    var server; 

    group('Server tests',() { 
    var server; 

    setUp(() { 
     var handler = const shelf.Pipeline().addHandler(router); 
     io.serve(handler, HOST, PORT).then((s) { 
      server = s; 
     }); 
    }); 

    tearDown(() { 
     server.close(); 
    }); 

    test('Invalid URL returns 404',() { 
     new HttpClient().getUrl(Uri.parse('http://$HOST:$PORT')) 
     .then((HttpClientRequest request) => request.close()) 
     .then(expectAsync((HttpClientResponse response) { 
      expect(response.statusCode, equals(404)); 
     })); 
    }); 

    test('GET /printers returns 200',() { 
     new HttpClient().getUrl(Uri.parse('http://$HOST:$PORT$rootPrintersPath')) 
     .then((HttpClientRequest request) => request.close()) 
     .then(expectAsync((HttpClientResponse response) { 
     expect(response.statusCode, equals(200)); 
     })); 
    }); 

    test('POST /printers returns 201',() { 
     new HttpClient().postUrl(Uri.parse('http://$HOST:$PORT$rootPrintersPath')) 
     .then((HttpClientRequest request) { 
      request.write('{"foo": 42}'); 
      return request.close(); 
     }) 
     .then(expectAsync((HttpClientResponse response) { 
      expect(response.statusCode, equals(201)); 
     })); 
    }); 
    }); 
} 

UPDATE：决定放弃的HttpClient有利于http包。更容易处理，我的测试现在终止。显然，我在第一次复飞时没有正确处理一些事情。下面是上面的代码看起来像现在：

import 'dart:io'; 
import 'package:http/http.dart' as http; 
import 'package:unittest/unittest.dart'; 
import 'package:shelf/shelf.dart' as shelf; 
import 'package:shelf/shelf_io.dart' as io; 
import 'package:toner_track/handlers.dart'; 
import 'package:toner_track/config.dart'; 

void main() { 
    group('Server tests',() { 
    var server; 

    setUp(() { 
     var handler = const shelf.Pipeline().addHandler(router); 
     return io.serve(handler, HOST, PORT).then((s) { 
     server = s; 
     }); 
    }); 

    tearDown(() { 
     server.close(); 
    }); 

    test('Invalid URL returns 404',() { 
     http.get('http://$HOST:$PORT').then(expectAsync((response) { 
     expect(response.statusCode, equals(404)); 
     })); 
    }); 

    test('GET /printers returns 200',() { 
     http.get('http://$HOST:$PORT$rootPrintersPath').then(expectAsync((response) { 
     expect(response.statusCode, equals(200)); 
     })); 
    }); 

    test('POST /printers returns 201',() { 
     http.post('http://$HOST:$PORT$rootPrintersPath', body: {"foo": "42"}).then(expectAsync((response) { 
      expect(response.statusCode, equals(201)); 
     })); 
    }); 
    }); 
} 

Answer 1

它看起来并不像这是你的问题的原因，但如果你在setUp启动异步操作，你应该回到未来。

return io.serve(handler, HOST, PORT).then((s) { 
     server = s; 

的单元测试框架等待将来回到它开始运行测试之前。

我认为测试应该做同样的事情。据我记得有一个开放的bug，对于测试本身来说，当异步操作开始时它应该足以返回Future，但它在setUp中不起作用。这是前一阵子，所以我认为这是固定的。

test('Invalid URL returns 404',() { 
    return new HttpClient().getUrl(Uri.parse('http://$HOST:$PORT')) 
    .then((HttpClientRequest request) => request.close()) 
    .then(expectAsync((HttpClientResponse response) { 
     expect(response.statusCode, equals(404)); 
    })); 
}); 

如果这不起作用

test('POST/... 


test('Invalid URL returns 404',() { 
    var cb = new expectAsync((){}); 

    new HttpClient().getUrl(Uri.parse('http://$HOST:$PORT')) 
    .then((HttpClientRequest request) => request.close()) 
    .then(expectAsync((HttpClientResponse response) { 
     expect(response.statusCode, equals(404)); 
     cb(); // <== to notify the unit test framework that the async operation is finished 
    })); 
}); 

Answer 2

添加以下在主函数的开始： useGoogle3VMConfiguration（）;