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By Roy Osherove
Summary
The paintings of Unit trying out, moment Edition courses you step-by-step from writing your first uncomplicated assessments to constructing strong attempt units which are maintainable, readable, and reliable. You'll grasp the foundational principles and fast circulate to high-value topics like mocks, stubs, and isolation, together with frameworks equivalent to Moq, FakeItEasy, and Typemock Isolator. You'll discover attempt styles and association, operating with legacy code, or even "untestable" code. alongside the best way, you'll know about integration trying out and methods and instruments for checking out databases and different technologies.
About this Book
You comprehend you need to be unit trying out, so why aren't you doing it? If you're new to unit trying out, if you happen to locate unit trying out tedious, or if you're simply now not getting adequate payoff for the trouble you set into it, continue reading.
The artwork of Unit trying out, moment Edition courses you step-by-step from writing your first easy unit exams to development entire attempt units which are maintainable, readable, and reliable. You'll circulate fast to extra advanced topics like mocks and stubs, whereas studying to exploit isolation (mocking) frameworks like Moq, FakeItEasy, and Typemock Isolator. You'll discover attempt styles and association, refactor code purposes, and how one can try "untestable" code. alongside the best way, you'll know about integration checking out and strategies for trying out with databases.
The examples within the booklet use C#, yet will gain an individual utilizing a statically typed language corresponding to Java or C++.
What's Inside
• Create readable, maintainable, reliable tests
• Fakes, stubs, mock items, and isolation (mocking) frameworks
• basic dependency injection techniques
• Refactoring legacy code
About the Author
Roy Osherove has been coding for over 15 years, and he consults and trains groups around the world at the light artwork of unit checking out and test-driven improvement. His weblog is at ArtOfUnitTesting.com.
Table of Contents
PART 1: GETTING STARTED
1. the fundamentals of unit testing
2. a primary unit test
PART 2: middle TECHNIQUES
3. utilizing stubs to damage dependencies
4. interplay checking out utilizing mock objects
5. Isolation (mocking) frameworks
6. Digging deeper into isolation frameworks
PART three: THE try CODE
7. try hierarchies and organization
8. The pillars of fine unit tests
PART four: layout AND PROCESS
9. Integrating unit checking out into the organization
10. operating with legacy code
11. layout and testability
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Additional info for The Art of Unit Testing: With Examples in C# (2nd Edition)
Example text
All the units have to work together, and each could malfunction, making it harder to find the source of the bug. 2 to integration tests and consider what you want to achieve with real-world unit tests: ■ Can I run and get results from the test I wrote two weeks or months or years ago? If you can’t, how would you know whether you broke a feature that you created earlier? Code changes regularly during the life of an application, and if you can’t (or won’t) run tests for all the previously working features after changing your code, you just might break it without knowing.
On a more upbeat note, you may have had a great first experience with unit tests, and you’re reading this to see what more you might be missing. This chapter will first analyze the “classic” definition of a unit test and compare it to the concept of integration testing. This distinction is confusing to many. Then we’ll look at the pros and cons of unit testing versus integration testing and develop a better definition of a “good” unit test. We’ll finish with a look at testdriven development, because it’s often associated with unit testing.
It’s code that will probably get used by the unit of work you’re testing, but there’s no need to test it directly. But watch out: once you add any check inside a property, you’ll want to make sure that logic is being tested. In the next section, we’ll look at a simple unit test done entirely with code, without using any unit testing framework. 5 A simple unit test example It’s possible to write an automated unit test without using a test framework. In fact, because developers have gotten more into the habit of automating their testing, I’ve seen plenty of them doing this before discovering test frameworks.