使用ObserveOnDispatcher进行单元测试 [英] Unit testing something with ObserveOnDispatcher

问题描述

我的视图模型中有一些代码，如下所示：

I've some code in my view model as follows:

miService.GetSomething(par1, par2)
.ObserveOnDispatcher()
.Subscribe(dt =>
 {
    DoSomething(dt);
 });

然后在我的测试中，我正在模拟我的服务，如下所示：

Then in my test, I'm "mocking" my service as follows:

miService.Setup(ms => ms.GetSomething(....))
.Returns(Observable.Return(XYZ));

问题是由于ObserveOnDispatcher，订阅委托从未执行。

The problem is that due to the ObserveOnDispatcher, the subscribe delegate is never executed.

我已经用DispatcherFrame和PushFrame看到了一些代码，但是问题是我不知道哪里，我可以打电话

I've seen some code with DispatcherFrame and PushFrame, but the problem is that I don't know "where", I can call

frame.Continue = false;

推荐答案

您可以尝试

var frame = new DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(
  DispatcherPriority.Background, 
  new Action(() => frame.Continue = false));
Dispatcher.PushFrame(frame);

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