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How to Build Android Apps with Kotlin

You're reading from   How to Build Android Apps with Kotlin A hands-on guide to developing, testing, and publishing your first apps with Android

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781838984113
Length 794 pages
Edition 1st Edition
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Authors (4):
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Eran Boudjnah Eran Boudjnah
Author Profile Icon Eran Boudjnah
Eran Boudjnah
Jomar Tigcal Jomar Tigcal
Author Profile Icon Jomar Tigcal
Jomar Tigcal
Alex Forrester Alex Forrester
Author Profile Icon Alex Forrester
Alex Forrester
Alexandru Dumbravan Alexandru Dumbravan
Author Profile Icon Alexandru Dumbravan
Alexandru Dumbravan
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Toc

Table of Contents (17) Chapters Close

Preface
1. Creating Your First App 2. Building User Screen Flows FREE CHAPTER 3. Developing the UI with Fragments 4. Building App Navigation 5. Essential Libraries: Retrofit, Moshi, and Glide 6. RecyclerView 7. Android Permissions and Google Maps 8. Services, WorkManager, and Notifications 9. Unit Tests and Integration Tests with JUnit, Mockito, and Espresso 10. Android Architecture Components 11. Persisting Data 12. Dependency Injection with Dagger and Koin 13. RxJava and Coroutines 14. Architecture Patterns 15. Animations and Transitions with CoordinatorLayout and MotionLayout 16. Launching Your App on Google Play

UI Tests

UI tests are instrumented tests where developers can simulate user journeys and verify the interactions between different modules of the application. They are also referred to as end-to-end tests. For small applications, you can have one test suite, but for larger applications, you should split your test suites to cover particular user journeys (logging in, creating an account, setting up flows, and so on). Because they are executed on the device, you will need to write them in the androidTest package, which means they will run with the Instrumentation framework. Instrumentation works as follows:

  • The app is built and installed on the device.
  • A testing app will also be installed on the device that will monitor your app.
  • The testing app will execute the tests on your app and record the results.

One of the drawbacks of this is the fact that the tests will share persisted data, so if a test stores data on the device, then the second test can have access...

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