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POReactiveUI: Testing observable properties from unit tests
 

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    <p>There is this <a href="http://blogs.msdn.com/b/rxteam/archive/2012/06/14/testing-rx-queries-using-virtual-time-scheduling.aspx" rel="nofollow">example</a> on the official RX blog:</p> <pre><code>var scheduler = new TestScheduler(); var xs = scheduler.CreateColdObservable( OnNext(10, 42), OnCompleted&lt;int&gt;(20) ); var res = scheduler.Start(() =&gt; xs); res.Messages.AssertEqual( OnNext(210, 42), // Subscribed + 10 OnCompleted&lt;int&gt;(220) // Subscribed + 20 ); xs.Subscriptions.AssertEqual( Subscribe(200, 1000) // [Subscribed, Disposed] ); </code></pre> <p>I'd like to do something like this with reactiveui. I mean instead of the scheduler.CreateColdObservable(...) use the streams from actual property change notification. The problem is that I tried vm.ObservableForProperty and vm.Changed but they worked inconsistently (not all property change created an event or the value was null)</p> <p>Here is the code of my VM:</p> <pre><code>internal class ProductFileEditorVM : ReactiveObject { private readonly List&lt;string&gt; _preloadedList; private bool _OnlyContainingProduct; public bool OnlyContainingProduct { get { return _OnlyContainingProduct; } set { this.RaiseAndSetIfChanged(x =&gt; x.OnlyContainingProduct, value); } } private ObservableAsPropertyHelper&lt;IEnumerable&lt;string&gt;&gt; _RepoList; public IEnumerable&lt;string&gt; RepoList { get{return _RepoList.Value;} } public ProductFileEditorVM(RepositoryManager repositoryManager) { //Set defaults OnlyContainingProduct = true; //Preload _preloadedList = repositoryManager.GetList(); var list = this.WhenAny(x =&gt; x.OnlyContainingProduct, ocp =&gt; ocp.Value ? _preloadedRepoList.Where(repo =&gt; repo.ToLower().Contains("product")) : _preloadedRepoList); list.ToProperty(this, x =&gt; x.RepoList); } } </code></pre> <p>Ideally I'd like to use Observable.CombineLatest on the two property and creating a tuple and comparing this tuple in the assert expression like in the first example.</p> <p>The good result would be:</p> <ol> <li>[OnlyContainingProduct==true;RepoList= the filtered one] </li> <li>!change OnlyContainingProduct to false</li> <li>[OnlyContainingProduct==false;RepoList= the whole list]</li> </ol> <p>*<em>Or is this the wrong way to approach it? The only example I saw about this uses actual time measures like milliseconds but I don't see how they are useful except in case of Throttle and similar methods. *</em> </p>
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