Book Image

Kotlin Programming Cookbook

By : Aanand Shekhar Roy, Rashi Karanpuria
Book Image

Kotlin Programming Cookbook

By: Aanand Shekhar Roy, Rashi Karanpuria

Overview of this book

The Android team has announced first-class support for Kotlin 1.1. This acts as an added boost to the language and more and more developers are now looking at Kotlin for their application development. This recipe-based book will be your guide to learning the Kotlin programming language. The recipes in this book build from simple language concepts to more complex applications of the language. After the fundamentals of the language, you will learn how to apply the object-oriented programming features of Kotlin 1.1. Programming with Lambdas will show you how to use the functional power of Kotlin. This book has recipes that will get you started with Android programming with Kotlin 1.1, providing quick solutions to common problems encountered during Android app development. You will also be taken through recipes that will teach you microservice and concurrent programming with Kotlin. Going forward, you will learn to test and secure your applications with Kotlin. Finally, this book supplies recipes that will help you migrate your Java code to Kotlin and will help ensure that it's interoperable with Java.
Table of Contents (21 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Running instrumentation tests


In the preceding recipes, we learned how to run and write unit tests. In this recipe, we will learn how to run instrumentation tests. The integration tests are placed under the androidTest directory in your Android project.

Getting ready

Since instrumentation tests require real devices or emulators to run on, ensure that you have one of either of these. We'll be using Android Studio 3.0 for our coding purposes. You can download the source code from https://gitlab.com/aanandshekharroy/Anko-examples and switch to the 5-instrumentation-tests branch. We will also be using Espresso for writing instrumentation tests as it is the easiest software to use. Espresso is automatically included in your project when you create a new project.

Note

Espresso is targeted at developers who believe that automated testing is an integral part of the development lifecycle. While it can be used for black-box testing, Espresso's full power is unlocked by those who are familiar with the...