Fault injection for .NET apps?

Question

I am wondering if anyone knows of tools or techniques to automatically inject common faults into a running .NET program. Stuff like...

• Randomly inject an OutO

Answer 1

Typemock Isolator seems to be your best bet.

Here's what you can do, if you want to throw a FileNotFoundException to simulate testing.

In your production code, you have such method

public static Project OpenProject(string filePath)

And in your test code, you can fake the OpenProject call like this

Isolate.WhenCalled(()=>Project.OpenProject(nulll)).WillThrow(new FileNotFoundException());

And when your code hit OpenProject, a FileNotFoundException will be thrown.