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POHow can I test for an expected exception with a specific exception message from a resource file in Visual Studio Test?
 

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  1. POHow can I test for an expected exception with a specific exception message from a resource file in Visual Studio Test?
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    <p>Visual Studio Test can check for expected exceptions using the ExpectedException attribute. You can pass in an exception like this:</p> <pre><code>[TestMethod] [ExpectedException(typeof(CriticalException))] public void GetOrganisation_MultipleOrganisations_ThrowsException() </code></pre> <p>You can also check for the message contained within the ExpectedException like this:</p> <pre><code>[TestMethod] [ExpectedException(typeof(CriticalException), "An error occured")] public void GetOrganisation_MultipleOrganisations_ThrowsException() </code></pre> <p>But when testing I18N applications I would use a resource file to get that error message (any may even decide to test the different localizations of the error message if I want to, but Visual Studio will not let me do this:</p> <pre><code>[TestMethod] [ExpectedException(typeof(CriticalException), MyRes.MultipleOrganisationsNotAllowed)] public void GetOrganisation_MultipleOrganisations_ThrowsException() </code></pre> <p>The compiler will give the following error:</p> <blockquote> <p>An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute</p> </blockquote> <p>Does anybody know how to test for an exception that has a message from a resource file?</p> <hr> <p>One option I have considered is using custom exception classes, but based on often heard advice such as:</p> <blockquote> <p>"Do create and throw custom exceptions if you have an error condition that can be programmatically handled in a different way than any other existing exception. Otherwise, throw one of the existing exceptions." <a href="http://blogs.msdn.com/kcwalina/archive/2005/03/16/396787.aspx" rel="noreferrer">Source</a></p> </blockquote> <p>I'm not expecting to handle the exceptions differently in normal flow (it's a critical exception, so I'm going into panic mode anyway) and I don't think creating an exception for each test case is the right thing to do. Any opinions?</p>
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    1. COThe message parameter does not get checked against the message of the thrown exception.
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