Roy Osherove: Zero to 60 Unit Testing in C#

The Problem

Unit testing, done badly, can hurt your project more than it helps. In some cases, it may lead to project schedule delays, and unhappy developers due to huge maintenance problems. But when unit testing is done right, it can help the project and developers’ confidence immensely.

The challenge is - how do you do it in a way that is helping, rather than hurting your project?

Objective

In this workshop we will learn essential unit testing and test-driven skills and techniques for writing unit tests in a readable, maintainable, and trustworthy fashion, so that we can feel more confident in our code,  make it simpler, and save ourselves time in debugging and maintaining our code base. 

• Learn how to write readable, maintainable, trustworthy unit tests using C#,XUnit, NUnit and other unit testing tools and frameworks. 
• Learn how to refactor and test legacy code, and what to do when we cannot change existing code.
• Learn the principles of Test Driven Development, and develop new features using TDD.
• Learn how to Pair Program, and experience it throughout the course
• Learn about mocks, stubs fakes, and the difference between them
• Learn about Isolation(mocking) frameworks, how they work, and why some frameworks are more capable than others

Interactive Agenda 

• The first unit test, Entry points & Exit Points
• The first unit test, Entry points & Exit Points
• Basic XUnit/NUnit APIs, test runners, tips and tricks
• Writing readable tests
• Test Driven Development Introduction
• TDD Kata Exercises

• Understanding Fakes, Mocks, and Stubs
• Hand Written Fakes, Stubs, and Mocks
• Interaction Test Exercises 
• Isolation Frameworks: Constrained and Unconstrained

• Isolation Framework Comparisons (Moq, FakeItEasy, NSubstitute)
• Interaction Test Exercises part 2 

• Unit Testing Good Practices
• Legacy Code Refactoring Essential Techniques
• Exercises in Legacy Refactoring

Materials

All students get 

• a PDF of all the slides in the course, in downloadable form.
• Source Code Examples
• Dedicated SLACK channel for future questions