1. Stubs, Shims, and Mocks, oh my!
Unit Testing with Visual Studio Fakes
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5. What are Microsoft (Visual Studio) Fakes?
 A tool for generating code entry and isolation endpoints
 Generates “fake” assemblies and includes them in your project
 Fakes then contain Stub and Shim classes
 Included with Visual Studio 2012 and 2013 [requires Ultimate]
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Stubs
 Easily create Mock objects based on Interfaces
 Encourages good design
 Often requires refactoring

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Shims
 Used for more difficult test items
 Or when you cannot refactor
 Shims are considered evil
 Use sparingly
 Refactor as soon as possible
 Remove Shims

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Configuration
 Editing the Config files
 Allows you to minimize generated code
 Enabling Diagnostics
 Don’t forget to turn on Diagnostics in VS Options

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Additional Resources
 Testing un-testable code:
http://channel9.msdn.com/Events/TechEd/Europe/2012/DEV411
 Isolating Code Under Test with Microsoft Fakes:
http://msdn.microsoft.com/en-us/library/hh549175(v=vs.110).aspx
 Peter Provost’s blog (search for Fakes):
http://www.peterprovost.org/blog/

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Questions?