Book Image

Scala Test-Driven Development

By : Gaurav Sood
Book Image

Scala Test-Driven Development

By: Gaurav Sood

Overview of this book

Test-driven development (TDD) produces high-quality applications in less time than is possible with traditional methods. Due to the systematic nature of TDD, the application is tested in individual units as well as cumulatively, right from the design stage, to ensure optimum performance and reduced debugging costs. This step-by-step guide shows you how to use the principles of TDD and built-in Scala testing modules to write clean and fully tested Scala code and give your workflow the change it needs to let you create better applications than ever before. After an introduction to TDD, you will learn the basics of ScalaTest, one of the most flexible and most popular testing tools around for Scala, by building your first fully test-driven application. Building on from that you will learn about the ScalaTest API and how to refactor code to produce high-quality applications. We’ll teach you the concepts of BDD (Behavior-driven development) and you’ll see how to add functional tests to the existing suite of tests. You’ll be introduced to the concepts of Mocks and Stubs and will learn to increase test coverage using properties. With a concluding chapter on miscellaneous tools, this book will enable you to write better quality code that is easily maintainable and watch your apps change for the better.
Table of Contents (16 chapters)
Scala Test-Driven Development
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface

Talk is cheap


We have talked enough about BDD. There is no alternative to getting our hands on the steering wheel. Let us look at setting up BDD scenarios in our example application using Cucumber.

We will need to introduce the Cucumber library dependencies that we will need to include in our SBT-build descriptor. Along with Cucumber, we will also need dependencies for JUnit. This is because I have always found it easier to integrate Cucumber with SBT using JUnit. There are some third-party SBT plugins that also allow for Cucumber and SBT integration, but since they are not maintained by LightBend (previously known as TypeSafe), they are not up-to-date with the latest Scala and SBT versions.

Adding Cucumber dependency

With the new library dependencies added, our build.scala file should look like this:

name := "BaseConversionAPI" version := "1.0" scalaVersion := "2.11.8" libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.6" % "test"  
libraryDependencies +="info.cukes" %% "cucumber...