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Practical Test-Driven Development using C# 7

By : Callaway, Hunt

4 (11)

Buy this Book

Practical Test-Driven Development using C# 7

4 (11)

By: Callaway, Hunt

Buy this Book

Overview of this book

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!

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Free Chapter

Why TDD is Important

First, a little background

So, what is TDD?

An approach to TDD

Arguments against TDD

Arguments in favor of TDD

Different types of test

Why does it matter?

Summary

Setting Up the .NET Test Environment

Installing the .NET Core SDK

Creating a project in VS Code

Switching to xUnit

What is Speaker Meet?

Summary

Setting Up a JavaScript Environment

Node.js

A quick introduction to JavaScript IDEs

Summary

What to Know Before Getting Started

Untestable code

Summary

Tabula Rasa – Approaching an Application with TDD in Mind

Where to begin

Yak shaving

A clean slate

Test small

Devil's advocate

Test negative cases first

When testing is painful

Breaking down Speaker Meet

Summary

Approaching the Problem

Defining the problem

Digesting the problem

An N-Tiered hexagonal architecture

Testing direction

Summary

Test-Driving C# Applications

Reviewing the requirements

Speaker listing

Speaker details

Summary

Abstract Away Problems

Abstracting away problems

Abstracting the data layer

Genericizing the repository

Summary

Testing JavaScript Applications

Creating a React app

The plan

Speaker listing

Speaker detail

Summary

Exploring Integrations

Implementing a real API service

End-to-end integration tests

Configuring the API project

Summary

Changes in Requirements

Hello World

FizzBuzz

TODO app

Changes to Speaker Meet

What now?

Summary

The Legacy Problem

What is legacy code?

Typical issues resulting from legacy code

Issues that prevent adding tests

Dealing with legacy problems

Moving forward

Summary

Unraveling a Mess

Inheriting code

Life sometimes hands you lemons

Summary

A Better Foot Forward

What we've covered

Moving forward

Introducing TDD to your team

Rejoining the world as a TDD expert

Summary

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Summary

Our journey has come to an end, but fear not. You now are well equipped to enter the world as a TDD master.

You not only understand how to develop with a TDD mindset, you also know why TDD is so important to develop testable, extensible, and maintainable software applications. Your IDE is set up to test C# and/or JavaScript applications and you have a continuous feedback loop on the quality of your software.

You understand the importance of defining and testing the boundaries of an application and the benefits of abstracting away third-party code (including the .NET Framework). Spies, mocks, and fakes, and how best to employ them are now well understood.

Approaching a green-field application with TDD is mind should now be almost trivial. Take the broader problem of the overall application and break it into meaningful chunks that can be developed...