The Art of Unit Testing: with Examples in .NET Paperback – Jul 8 2009
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About the Author
The chief architect at Typemock, Roy Osherove is one of the original ALT.NET organizers. He consults and trains teams worldwide on the gentle art of unit testing and test-driven development. He frequently speaks at international conferences such as TechEd and JAOO. Roy's blog is at http://www.ISerializable.comISerializable.com.
Top Customer Reviews
I mostly liked how it is concise and straight to the point with clear examples. The author mentions a concept then directly displays a clear example followed by an explanation of the example. With less than 300 pages and a nicely organized material, this book is enjoyable and quick to read.
I truly think every developer should read this book before starting to write unit tests.
I will definitely be looking into more Manning books...
The book does go into mocking and interaction testing. As well as covers a few important things about proper maintenance of test code and how to achieve it.
This book should be in my opinion the first book to read on unit tests throughout because as I read, "light go on" occurs page after page, chapter after chapter.
I just finished reading the book and after I will have apply all the knowledge I learned and look many of references, I will surely read the book again. Like for a good movie, I wish I will see details I did not see the first time.
The author have definitely a rare talent to know how to communicate his knowledge to the same level as Steve McConnell in Code Complete.
If Roy wrote another book, I will certainly buy it with the hope that it will be as excellent as this.
Most Helpful Customer Reviews on Amazon.com (beta)
Although unit testing has become somewhat synonymous with Agile practices, such as Test-Driven Development (TDD), the book never assumes that you will be using TDD. It is valuable wether you write your tests before or after your code.
Roy Osherove clearly has a lot of experience with unit testing, and he willingly shares so we can learn from his mistakes and successes. As a long-term practitioner of TDD myself, I can vouch for most of the advice imparted by this book: It is based on established patterns and best practices that the unit testing community have arrived at through years of experimentation.
Being the anal-retentive perfectionist that I am, I would have liked to see the book adopt the Pattern Language of xUnit Test Patterns: Refactoring Test Code (Addison-Wesley Signature Series), but at least the guidance of those two books are very much in harmony, even if the terminology differs.
In summary, you can say that this book is a very readable and useful introduction to unit testing. If you are a beginner to intermediate unit test developer, you should definitely read this book - and then, as you become more advanced, you should still read xUnit Test Patterns :)
First of all it's not a thinly disguised book trying to sell you on TDD (as some unit testing books that I've read are), but rather it's a book that truly lives up to it's title - the art of unit testing.
Secondly, the discussions and examples in the book take real world considerations in mind. These are not simple contrite 'Hello World' tests, or 'perfect world' sets of code. It discuss' writing tests on both green and brown field applications.
A third aspect that is truly helpful is that there is an entire section for dealing with implementing unit testing in an organization and the politics you might face while doing so. Because the book isn't biased towards a particular software discipline, tool, or language, but on the 'art' of unit testing, these are tips and tricks you can take with you anywhere.
If you found books like 'The Pragmatic Programmer' or 'The Inmates are Running the Asylum' getting you revved up to write better software, then this book will drive you to a whole new level of unit testing.
I've been doing unit testing for several years now, but it wasn't until after I read this book, that it no longer was a chore that I checked off my 'TODO' list.
That being said the book isn't perfect (reason for 4 instead of 5 stars). First he talks very briefly in the early chapters (forgot which one) about Inversion of Control containers (IOC). He talks about IOC somewhere around where he is talking about constructor injection. He then goes on to say that IOC are beyond the scope of the book. I definitely disagree with this and think a good amount of space in the book (maybe a chapter or part of a chapter) should have been taken discussing the principles of IOC and where/why/how to use it. Its an integral part of constructor injection. If its beyond the scope of a unit testing book then where does it belong? IOC is beyond the scope of the book yet a discussion on a productivity tool (resharper) is (which i have to say i didn't mind because i found it interesting)? I just think this is a big omission in this book and is the main reason for the (-1 star) and not my 2nd point i'm about to make.
Ok the 2nd thing is the author works for TypeMock. He finally tells you that in later chapters. He seems to push Typemock a wee to much i think. Yes TypeMock is definitely the best mocking framework out there. It will allow you to mock things that you generally couldn't mock with other frameworks (Static/Shared methods) but after looking at the cost its more than a little expensive. It would have helped us greatly but the licensing cost are unreasonable (especially when you compare it to the other frameworks...FREE). Anyways, back to the topic at hand. I think the author seems to push it a little to much in the book though i will have to give it to him for using RhinoMock (free) for almost all his examples in the book.
In short, if you want a tactical book on unit testing that distills the passion and love of an expert practitioner into a very readable yet reference-friendly text on unit testing, this is it.
If you are new to unit testing or TDD, this book will demystify the practices, tools and techniques that would otherwise take years and lots of frustration to get right.
If you are an experienced practitioner of unit testing and TDD, and are already practicing SOLID, TOOD, and BDD not just as a flavor of the week but as a way of life, this book will provide unambiguous insight into different approaches that will help you refine your existing techniques or at a minimum, validate your approach which is always valuable to any developer who has an opportunity to review his/her techniques with a seasoned master. This book will afford you that opportunity.
While the book cites excellent references for TDD and design patterns, if there is one thing that I thought was missing was a narrative- even if by way of an appendix- that ties all of the techniques covered together in an example of building the example Logger component using TDD. I understand that this book is not about TDD, but at the same time, that's like a book on scuba equipment that teaches you precisely how to pressurize your CO2 tank, keep your mask from fogging up and care and maintenance of your scuba suit not being about scuba diving.
That said, knowing Roy, it must have been painful to resist a detailed examination on TDD, but, for this book to be effective, it had to be relatively short, to the point and most of all pragmatic for it to succeed at filling the void on the topic of unit testing techniques and practices. To that end, Roy hits the mark very elegantly without being pretentious, catering to those who test first, test last or don't (yet) test at all. While I would love for everyone to pick this book up and start doing TDD today, even if you aren't yet convinced on TDD, applying these techniques to writing code that is testable, and learning how to test the right things will be an instant asset to your product, your team and your organization.
We bought half a dozen more copies for the team and you can almost see the rolling waves of more useful and maintainable unit tests fanning out wherever those books travel.
The .NET aspects are not intrusive. This book is very useful for anyone who writes unit tests in any language, but doesn't yet have 10 years of experience to know how best to do so.
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