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Simplifying Android Development with Coroutines and Flows

You're reading from   Simplifying Android Development with Coroutines and Flows Learn how to use Kotlin coroutines and the flow API to handle data streams asynchronously in your Android app

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Product type Paperback
Published in Jul 2022
Publisher Packt
ISBN-13 9781801816243
Length 164 pages
Edition 1st Edition
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Jomar Tigcal Jomar Tigcal
Author Profile Icon Jomar Tigcal
Jomar Tigcal
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Table of Contents (11) Chapters Close

Preface 1. Part 1 – Kotlin Coroutines on Android
2. Chapter 1: Introduction to Asynchronous Programming in Android FREE CHAPTER 3. Chapter 2: Understanding Kotlin Coroutines 4. Chapter 3: Handling Coroutine Cancelations and Exceptions 5. Chapter 4: Testing Kotlin Coroutines 6. Part 2 – Kotlin Flows on Android
7. Chapter 5: Using Kotlin Flows 8. Chapter 6: Handling Flow Cancelations and Exceptions 9. Chapter 7: Testing Kotlin Flows 10. Other Books You May Enjoy

Testing Flows with Turbine

In this section, we will learn how to test Flows using Turbine, which is a third-party library that we can use to test flows in our project.

Hot flows such as SharedFlow and StateFlow, as you learned in the previous chapter, emit values even if there are no listeners. They also keep emitting values and do not complete. Testing them is a bit more complicated. You won’t be able to convert these flows to a list and then compare it to the expected values.

To test hot flows and make testing other Flows easier, you can use a library from Cash App called Turbine (https://github.com/cashapp/turbine). Turbine is a small testing library for Kotlin Flow that you can use in Android.

You can use the Turbine testing library in your Android project by adding the following to your app/build.gradle dependencies:

dependencies {
    …
    testImplementation 'app.cash.turbine:turbine:0.8.0'
...
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