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POMocking a method to throw an exception (moq), but otherwise act like the mocked object?
 

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    <p>I have a <code>Transfer</code> class, simplified it looks like this:</p> <pre><code>public class Transfer { public virtual IFileConnection source { get; set; } public virtual IFileConnection destination { get; set; } public virtual void GetFile(IFileConnection connection, string remoteFilename, string localFilename) { connection.Get(remoteFilename, localFilename); } public virtual void PutFile(IFileConnection connection, string localFilename, string remoteFilename) { connection.Get(remoteFilename, localFilename); } public virtual void TransferFiles(string sourceName, string destName) { source = internalConfig.GetFileConnection("source"); destination = internalConfig.GetFileConnection("destination"); var tempName = Path.GetTempFileName(); GetFile(source, sourceName, tempName); PutFile(destination, tempName, destName); } } </code></pre> <p>The simplified version of the <code>IFileConnection</code> interface looks like this:</p> <pre><code>public interface IFileConnection { void Get(string remoteFileName, string localFileName); void Put(string localFileName, string remoteFileName); } </code></pre> <p>The real class is supposed to handle a <code>System.IO.IOException</code> that is thrown when the <code>IFileConnection</code> concrete classes loses connectivity with the remote, sending out emails and what not.</p> <p>I would like to use Moq to create a <code>Transfer</code> class, and use it as my concrete <code>Transfer</code> class in all properties and methods, except when the <code>GetFile</code> method is invoked - then I want it to throw a <code>System.IO.IOException</code> and make sure the <code>Transfer</code> class handles it properly.</p> <p>Am I using the right tool for the job? Am I going about this the right way? And how would I write the setup for that unit test for <code>NUnit</code>?</p>
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