飛鏢嘲諷的Stream

Question

我試圖測試通過嘲諷插座

我的類使用的WebSockets類看起來像

class WebLoggerHandler{ 

    WebLoggerHandler(){ 

    var webSocket = new WebSocket('hostUrl'); 
    webSocket.onOpen.first.then((_) { 
     webSocket.sendString('hello'); 
    }); 
    } 
} 

我嘲諷的WebSocket類如下

class MockWebSocket extends Mock implements WebSocket{   
    Stream<Event> onOpen; 
} 

我測試的身體看起來像

var webSocket = new MockWebSocket(); 

    //fire the onOpen event 
    webSocket.onOpen = new Stream.fromFuture(new Future.value(new Event("onOpen"))); 

    WebLoggerHandler underTest = new WebLoggerHandler(); 

    //test that the hello message was sent when the socket was opened 
    webSocket.getLogs(callsTo("sendString", 'hello')).verify(happenedExactly(1)) 

但它不工作，因爲onClose事件發生在檢查webSocket日誌之後。

如何讓代碼等待未來發生？

謝謝

Answer 1

閱讀API文檔並已完成。測試需要返回未來

test("it should send 'hello' to the server",() { 

     return new Future.value().then((_) { 

     webSocket.getLogs(callsTo("sendString", {'hello'})).verify(happenedExactly(1)); 

     }); 

    });