Beginning to Mock with Rhino Mocks and MbUnit - Part 1
page 1 of 7
Published: 13 Sep 2007
In this article Ben provides a brief overview of Rhino Mocks mock object framework for the .NET platform with the help of an example. The author also discusses what a mock object is and when a mock object might be required.
by Ben Hall
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This is the first in a series of articles covering the Rhino Mocks mock object framework for the .NET platform. The aim of this series is to provide you with an understanding of how mock objects are used, how they can improve the quality of your unit tests and how mock objects can make the difficult to test sections of your application simpler to test.

In this first part I am going to cover what a mock object is and when a mock object might be required. I also give an example of using mock objects within your unit testing and show how mock objects can significantly increase the quality of your tests.

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User Comments

Title: "Program against interfaces"   
Name: Rogério Liesenfeld
Date: 2009-10-06 5:01:32 PM
What exactly is meant here by "program against interfaces, one of the core OO design rules"?

Creating an IDateTime interface with a single DateTimeController implementation class is absolutely NOT what was intended by the GoF book (Design Patterns) when they said "program to interface, not an implementation".

That "core OO design rule" is about something else: polymorphism; and it's really only applicable in the context of reusable OO software, specifically for dependencies between subsystems. Not at all the case for the example in this article.
Title: Question   
Name: bangi
Date: 2009-05-06 9:37:40 AM
Is it possible to mock an object to is called by the method that I am calling. Eg. 1SomeInterface has a method called GetUsers. GetUsers calls a method called findusers which belongs to a Interface IDataAccess. Is it correct to make a mock object for IDataAccess in my Test class hoping that when I call ISomeInterface when ISomeInterface gets to the IDataAccess.findusers() the mock version will be user instead of the real method.
Title: Thanks   
Name: dotnetguts
Date: 2008-10-27 2:23:56 PM
Thanks, Good Information.

Title: Excellent   
Name: Iran
Date: 2008-09-13 7:17:49 AM
Thanks a lot Ben for providing a simple start up guide for Rhino mocks
Title: Stubs v Mocks   
Name: Ben Hall
Date: 2008-05-27 6:49:28 AM
Title: I recomended this book   
Name: Carlos
Date: 2008-05-27 6:04:34 AM
This post is very well, but are confused concepts(STUBS-MOCKS)
I recommend reading this book is really good.
Title: Diference Stubs and Mocks   
Name: Carlos
Date: 2008-05-27 4:28:18 AM
I think these confusing terms between STUBS and MOCKS.
You've created a mock, for help to test the class, this is a stub not a mock. I recommend you read this article.
Title: Great Tutorial   
Name: Steve Smith
Date: 2008-03-22 12:55:29 PM
It didn't click for me until I read this - been trying to learn Rhino Mocks off and on for the last week. Nice job!
Title: Thanks for sharing   
Name: Jeena
Date: 2008-01-25 9:32:33 AM
Very good article. Thanks a lot
Title: Good introduction to Rhino Mocks   
Name: Tod Birdsall
Date: 2007-12-27 5:55:43 PM
Thanks for the nice introduction. It was very clear and easy to follow.
Title: .   
Name: Pawel Tarnik
Date: 2007-10-10 8:39:38 AM
Nice article, I look forward to reading the next part.
Title: Beginning to Mock with Rhino Mocks and MbUnit - Part 1   
Name: Lee
Date: 2007-10-09 7:46:47 PM
Thanks for the article - it's clear and easy to follow.

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