Add Assert.IsType<T>(object obj)

Description

xUnit has a nice Assert method: public static T IsType<T>(object @object) that is lacking from MS Test.

MS Test has an “old” method: Assert.IsInstanceOfType(object, typeof(object)). This feels very .Net 1.1 w/o generics.

xUnit Advantages

1. The xUnit method uses generics making it cleaner IMHO
2. The xUnit method returns the object (allows for clean one-liner)

Code Comparison

var badRequestResult = Assert.IsType<BadRequestObjectResult>(result);

//do stuff with badRequestResult
var blah = badRequestResult.Value;
...

vs

var badRequestResult = result as BadRequestObjectResult;
Assert.IsInstanceOfType(badRequestResult, typeof(BadRequestObjectResult));

//do stuff with badRequestResult
var blah = badRequestResult.Value;
...

Open to Adding?

What to do you think about extending the Assert API?

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Reference: SO Post: xUnit.net IsType Equivalent in MS Test That Returns Type

AB#1614478

[AbhitejJohn]

I actually just put that out, so I can go crazy with this extension point and also see if it works for consumers. From the download count, it does look useful. The core framework would still want to update itself with a few of these APIs that everyone would need just so there isn’t an extra step to find and pull in another package but that’s a choice for the framework now.

[AbhitejJohn]

@spottedmahn : Would this help? It does have the specific example you referred to. I agree that this would be nice addition in-box though.