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Modern Android 13 Development Cookbook

Modern Android 13 Development Cookbook

By : Madona S. Wambua
5 (20)
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Modern Android 13 Development Cookbook

Modern Android 13 Development Cookbook

5 (20)
By: Madona S. Wambua

Overview of this book

Android is a powerful operating system widely used in various devices, phones, TVs, wearables, automobiles, and more. This Android cookbook will teach you how to leverage the latest Android development technologies for creating incredible applications while making effective use of popular Jetpack libraries. You’ll also learn which critical principles to consider when developing Android apps. The book begins with recipes to get you started with the declarative UI framework, Jetpack Compose, and help you with handling UI states, Navigation, Hilt, Room, Wear OS, and more as you learn what's new in modern Android development. Subsequent chapters will focus on developing apps for large screens, leveraging Jetpack’s WorkManager, managing graphic user interface alerts, and tips and tricks within Android studio. Throughout the book, you'll also see testing being implemented for enhancing Android development, and gain insights into harnessing the integrated development environment of Android studio. Finally, you’ll discover best practices for robust modern app development. By the end of this book, you’ll be able to build an Android application using the Kotlin programming language and the newest modern Android development technologies, resulting in highly efficient applications.
Table of Contents (15 chapters)
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Writing tests for your ViewModels

Unlike Model-View-Controller (MVC) and Model-View-Presenter (MVP), MVVM is the favored design pattern in Modern Android Development because of its unidirectional data and dependency flow. Furthermore, it becomes more accessible to unit test, as you will see in this recipe.

Getting ready

We will use our previous recipe, Implementing ViewModel and understanding the state in Compose, to test our logic and state changes.

How to do it…

In this recipe, we will write unit tests to verify our authentication state changes since that is what we have implemented so far:

  1. Start by creating a LoginViewModelTest class in the test package:
Figure 3.14 – Created unit test

Figure 3.14 – Created unit test

  1. We will use the cashapp/turbine testing library for coroutine flows to test the flow we have created. Hence, you will need to include the processing code snippet in build.gradle:
    repositories {
      mavenCentral()
    }
    dependencies...
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