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Setting Up the .NET Test Environment

In this chapter, we'll explore setting up your development environment. We'll be covering both C# and .NET. In the following chapter, we will focus on setting up a JavaScript and React environment. We'll delve into more examples, starting with the classic code kata entitled FizzBuzz, and then into more real-world samples from the Speaker Meet site.

In this chapter, you will gain an understanding of:

Installing your IDE
How to set up your testing framework
Writing your first tests in C#

Key benefits

• Develop a thorough understanding of TDD and how it can help you develop simpler applications with no defects using C# and JavaScript

• Adapt to the mindset of writing tests before code by incorporating business goals, code manageability, and other factors

• Make all your software units and modules pass tests by analyzing failed tests and refactoring code as and when required

Description

Test-Driven Development (TDD) is a methodology that helps you to write as little as code as possible to satisfy software requirements, and ensures that what you've written does what it's supposed to do. If you're looking for a practical resource on Test-Driven Development this is the book for you. You've found a practical end-to-end guide that will help you implement Test-Driven Techniques for your software development projects. You will learn from industry standard patterns and practices, and shift from a conventional approach to a modern and efficient software testing approach in C# and JavaScript. This book starts with the basics of TDD and the components of a simple unit test. Then we look at setting up the testing framework so that you can easily run your tests in your development environment. You will then see the importance of defining and testing boundaries, abstracting away third-party code (including the .NET Framework), and working with different types of test double such as spies, mocks, and fakes. Moving on, you will learn how to think like a TDD developer when it comes to application development. Next, you'll focus on writing tests for new/changing requirements and covering newly discovered bugs, along with how to test JavaScript applications and perform integration testing. You’ll also learn how to identify code that is inherently un-testable, and identify some of the major problems with legacy applications that weren’t written with testability in mind. By the end of the book, you’ll have all the TDD skills you'll need and you’ll be able to re-enter the world as a TDD expert!

Who is this book for?

This book is for software developers with a basic knowledge of Test Driven Development (TDD) who want a thorough understanding of how TDD can benefit them and the applications they produce. The examples in this book are in C#, and you will need a basic understanding of C# to work through these examples.

What you will learn

• The core concepts of TDD

• Testing in action with a real-world case study in C# and JavaScript using React

• Writing proper Unit Tests and testable code for your application

• Using different types of test double such as stubs, spies, and mocks

• Growing an application guided by tests

• Exploring new developments on a green-field application

• Mitigating the problems associated with writing tests for legacy applications

• Modifying a legacy application to make it testable

What do you get with Print?

Instant access to your digital copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Redeem a companion digital copy on all Print orders

Access this title in our online reader with advanced features

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Pedro Quintero Mar 27, 2018

This is an excellent book, both as a reference and as an introduction to test-driven development. This book is for intermediate level programmers, it's full of best-practices and is easy to follow, with practical examples and clear narrative. I wish there was a companion site for the code used in the book. I found useful techniques (besides TDD) here that I am using in my projects. Highly recommended.

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Amazon Customer Jul 05, 2018

I have been struggling for some time as a solo developer to produce quality code on time within the expectation of the stakeholder. I never have enough time to debug and test. I had heard of TDD before this book but thought of it as something to abstract for my to tackle in the heat of the battle. However, last weekend I opened this book that I heard about on the Completed Developer Podcast. I consumed it in about 18 hours. By the end of the book, something that seemed far away was within reach. I had a section of code that I needed to refractor bad. So, using TDD I started developing a microservice to replace the back-end portion. It was slow at first, but once I got into a stride with Moq and XUnit, and with the examples from the book, I was off to the races. I will not say I have implemented TDD perfectly in this case or have great code coverage etc… But I feel a lot more comfortable and confident launching this feature update in a week than I have in any past launches over the last two years. I just know the code works.From a professionalism stand point I feel like I just made a huge leap forward in my code writing it just seems better and makes so much sense. The huge part to the story is that I am a contract consultant. With my current customer I was probably one failed demo away from have a cancelation notice issued. I know now for a fact that the demo will go as planned. There will not be any “oh crap I forgot to fix that”, while showing the features to the customer. The launch will go better, everyone is happy. Thank you both for writing this book in a very understanding and meaningful way. The examples and download code are spot and super easy to walk through.

Crystal Tenn Mar 01, 2018

This book is a great read, is feels very practical and easy to understand. I like how the intro breaks down TDD and related terminology into layman terms then digs deeper with samples, tips, and best practices for a realistic enterprise view. There is certainly developer humor in the writing, and it is easy to relate to the authors and many of the feelings good and bad I have had about enterprise code are echoed in the text. I love how the book has broken up different ideas into small digestible sections that make good chronological and logical order. Many texts are chock full of words without much direction, and they found a way to make a practical order so learning is easier.The book covers specific examples using C#, JavaScript (and React), and helps you setup sample code with clear instructions. Also, they talk about un-testable code, which is equally important to be able to recognize. If you know what can't be tested, you know how to write better code that can maximize the amount of tested code which was great to read about! I was also happy to see mocking, design patterns, dependency injection, and APIs covered in the text in addition as it relates to TDD.Overall, I think if you want to learn TDD and have little or a lot of experience, you can still learn a lot from this book. I highly recommended reading it and wish I had a copy of it when I first started development!

Ward Mar 15, 2018

Clean, simple, and easy to understand approach to TDD.The authors hit one out of the ballpark with this one. The authors not only know TDD but also understand the problems developers, like myself, face involving TDD. Some of these problems are understanding the concepts, setting up an environment, or even digging into old code. They have covered the material from the viewpoint of standing up a new application all the way to, the dreaded, legacy code - that stuff we seem to get handed and have no idea how to handle. Now we have a strategy!What I like most about this book is the journey the reader is taken on. No assumptions are made, every topic has clear explanations, examples, and when applicable, code samples. What's more, the discussions focus on both C# and JavaScript - two of the largest used languages for both frontend and backend development.In prior years, I've struggled with knowing how to implement TDD into my development team. The one piece I was missing, which this book highlights perfectly, is the mindset on testing first. Thinking about tests first, instead of writing code results in better code. By better code, of course, I mean fewer bugs and increasingly faster development time.

Jay V May 16, 2018

Overall, this is a great introduction to Test Driven Development in .NET, and in general. In the process, it's also a pretty good introduction to building an ASP.NET Core application from scratch.I really appreciated how the authors were able to provide examples of many of the actual problems I've seen when trying to apply TDD principles, and then provide practical solutions (sometimes more than one). I also liked seeing the different approaches to TDD in various application layers, e.g. using Mocha and Chai in a React front-end. I'm not sure I'd 100% agree with their choices of test frameworks, but the examples provided were easy enough to follow along and apply in any environment.

Practical Test-Driven Development using C# 7: Unleash the power of TDD by implementing real world examples under .NET environment and JavaScript

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Practical Test-Driven Development using C# 7

Setting Up the .NET Test Environment

Installing the .NET Core SDK

Getting set up with VS Code

Creating a project in VS Code

Switching to xUnit

Code katas

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