You're reading from Simplifying Application Development with Kotlin Multiplatform Mobile Write robust native applications for iOS and Android efficiently

Product type Paperback

Published in Mar 2022

Publisher Packt

ISBN-13 9781801812580

Length 184 pages

Edition 1st Edition

Languages

Kotlin

Tools

Android

Concepts

Application Development

Author (1):

Robert Nagy

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Table of Contents (15) Chapters

Preface

1. Section 1 - Getting Started with Multiplatform Mobile Development Using Kotlin

2. Chapter 1: The Battle Between Native, Cross-Platform, and Multiplatform FREE CHAPTER

3. Chapter 2: Exploring the Three Compilers of Kotlin Multiplatform

4. Chapter 3: Introducing Kotlin for Swift Developers

5. Section 2 - Code Sharing between Android and iOS

6. Chapter 4: Introducing the KMM Learning Project

7. Chapter 5: Writing Shared Code

8. Chapter 6: Writing the Android Consumer App

9. Chapter 7: Writing an iOS Consumer App

10. Section 3 - Supercharging Yourself for the Next Steps

11. Chapter 8: Exploring Tips and Best Practices

12. Chapter 9: Integrating KMM into Existing Android and iOS Apps

13. Chapter 10: Summary and Your Next Steps

14. Other Books You May Enjoy

Testing shared code

Testing shared code in KMP is similar to writing code in KMP: in your shared code, you will have to write platform-agnostic code. This means no third-party testing frameworks or libraries that target a specific platform, JVM, JS, or iOS, such as XCTest or JUnit. Thankfully, KMP already provides a library that targets JVM, JS, and Native: https://kotlinlang.org/api/latest/kotlin.test/.

kotlin.test provides an Asserter abstraction with a DefaultAsserter that is dependency-free, but it also provides JUnitAsserter, JUnit5Asserter, and TestNGAsserter so that you can choose the one you'd like to use in your JVM or Android targets.

You can also implement your own Asserter implementations for the different platforms if you wish. The same expect/actual mechanism can be used in your tests as well.

But what about which test double (https://en.wikipedia.org/wiki/Test_double) you should choose to test your shared code – Stubs, Mocks, Spies, Fakes, or Dummies...