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POUse Moq to verify if list within object is changed properly
 

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  1. POUse Moq to verify if list within object is changed properly
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    <p>I'm trying to add Moq to my tests in MSTest to test parts of my code.</p> <p>The code i want to test which is not working is a piece of code that should filter data retreived by a service and pass this through. My code is set up through the MVP Pattern and i have the following components. (i'm testing my presenter)</p> <ul> <li><p>Service -> this service is retrieving a list of objects and putting this in a model (I'm using a Mock (Moq) to return values)</p></li> <li><p>Model -> Entity object with some general properties and a list of documents</p></li> <li><p>View -> The interface my usercontrol is implementing to talk to the presenter. this view is also mocked with moq.</p></li> <li><p>Presenter -> object to retrieve the model from the service and assign this model to a property of the view.</p></li> </ul> <p>in my first scenario that is working i just retrieve a model from the service and the presenter passes this to a property of the view.</p> <pre><code>//Setup AccountsPayableService Mock _mockedDocumentService = new Mock&lt;IDocumentService&gt;(); DocumentModel&lt;InvoiceDocumentRow&gt; model = new DocumentModel&lt;InvoiceDocumentRow&gt;(); List&lt;InvoiceDocumentRow&gt; invoices = new List&lt;InvoiceDocumentRow&gt;(); InvoiceDocumentRow row = new InvoiceDocumentRow(); row.BillingMonth = DateTime.Now; invoices.Add(row); model.Documents = invoices; _mockedDocumentService.Setup(service =&gt; service.GetInvoiceDocumentList(It.IsAny&lt;DateTime&gt;(), It.IsAny&lt;DateTime&gt;(), _user)).Returns(model); //Setup View Mock _mockedView = new Mock&lt;IInvoicesView&gt;(); //Setup Presenter to be tested _presenter = new FooPresenter(_mockedDocumentService.Object); _presenter.SetView(_mockedView.Object); //Act //These events will make the presenter do the call to the service and assign this to the view property _mockedView.Raise(view =&gt; view.Init += null, new EventArgs()); _mockedView.Raise(view =&gt; view.FirstLoad += null, new EventArgs()); //Assert _mockedDocumentService.Verify(aps =&gt; aps.GetInvoiceDocumentList(from, changedTo, _user), Times.Once()); _mockedView.VerifySet(view =&gt; view.DocumentList = model); </code></pre> <p>This test runs and is working perfectly.</p> <p>however i also have a case where the presenter should filter some of the results it got back from the service and assign a subset to the view. For some reason i can't get this to work.</p> <p>in essential this is exactly the same test code except a different method on the presenter is used that retrieves data from the service, filters it and then passes it back to the view.</p> <p>when i do an assert on the view property like i did before: </p> <pre><code>_mockedView.VerifySet(view =&gt; view.DocumentList.Documents = filteredModel.Documents); </code></pre> <p>i'm getting an error:</p> <pre><code>System.ArgumentException: Expression is not a property setter invocation. </code></pre> <p>What am i doing wrong?</p>
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    1. USGeertvdC
    1. USGeertvdC
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    1. COFirst, one advice. Consider start using inversion of control. Frameworks like Ninject does this: http://code.google.com/p/ninject/. More in: http://davidhayden.com/blog/dave/archive/2008/06/25/NinjectInlineModuleFactoryMethodsProviderSamples.aspx
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      1. USCustodio
    2. COWe're using inversion of control. just not using any framework in our tests for now.
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      1. USGeertvdC
 

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