The Art of Unit Testing, Second Edition
with examples in C#
Roy Osherove
Forewords by Michael Feathers and Robert C. Martin
  • November 2013
  • ISBN 9781617290893
  • 296 pages
  • printed in black & white

This book is something special. Th e chapters build on each other to a startling accumulation of depth. Get ready for a treat.

From the Foreword by Robert C. Martin, cleancoder.com

The Art of Unit Testing, Second Edition guides you step by step from writing your first simple tests to developing robust test sets that are maintainable, readable, and trustworthy. You'll master the foundational ideas and quickly move to high-value subjects like mocks, stubs, and isolation, including frameworks such as Moq, FakeItEasy and Typemock Isolator. You'll explore test patterns and organization, working with legacy code, and even "untestable" code. Along the way, you'll learn about integration testing and techniques and tools for testing databases and other technologies.

About the book

You know you should be unit testing, so why aren't you doing it? If you're new to unit testing, if you find unit testing tedious, or if you're just not getting enough payoff for the effort you put into it, keep reading.

The Art of Unit Testing, Second Edition guides you step by step from writing your first simple unit tests to building complete test sets that are maintainable, readable, and trustworthy. You'll move quickly to more complicated subjects like mocks and stubs, while learning to use isolation (mocking) frameworks like Moq, FakeItEasy, and Typemock Isolator. You'll explore test patterns and organization, refactor code applications, and learn how to test "untestable" code. Along the way, you'll learn about integration testing and techniques for testing with databases.

The examples in the book use C#, but will benefit anyone using a statically typed language such as Java or C++.

What's inside

  • Create readable, maintainable, trustworthy tests
  • Fakes, stubs, mock objects, and isolation (mocking) frameworks
  • Simple dependency injection techniques
  • Refactoring legacy code

About the author

Roy Osherove has been coding for over 15 years, and he consults and trains teams worldwide on the gentle art of unit testing and test-driven development. His blog is at ArtOfUnitTesting.com.


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The best way to learn unit testing from what is now a classic in the field.

Raphael Faria, LG Electronics

Teaches you the philosophy as well as the nuts and bolts for effective unit testing.

Pradeep Chellappan, Microsof

When my team members ask me how to write unit tests the right way, I simply answer: Get this book!

Alessandro Campeis, Vimar SpA

The single best resource on unit testing.

Kaleb Pederson, Next IT Corporation