Join Chiu-Ki Chan for an in-depth discussion in this video Local vs. on-device, part of Effective Android Testing for Mobile Developers.
- [Female] The Android operating system is spelled…using the Java programming language.…When you write an Android app, you are using…the Java core functionality with additional code…provided by the Android operating system.…Java is a widely used language,…and the Java part of your app can be executed…on any machine that runs a Java Virtual Machine, the JVM.…This includes your computer,…whether the is a desktop or a laptop.…
However, to run and therefore test an Android app,…you will need an Android device,…either a physical one or an emulator.…In either case, when you run your test,…you will need to transfer your app…and test code from the host computer to the device…and install it.…This takes time,…therefore, it is genuinely desirable to organize your code…such that you can compartmentalize the Java code,…the part without any Android libraries…into separate modules,…and test them with JVM unit tests.…
That is the fastest kind of test you can run,…and it's a great way to test business logic code.…But because the JVM does not have any knowledge…
Author
Chiu-Ki Chan
Released
8/30/2017Looking for study partners?
Join the Associate Android Developer Exam study groupThere's a difference between knowing how to implement testing and knowing when and why to do it. In this project-based course, get acquainted with best practices for testing Android apps by walking through a development workflow where testing is integrated throughout the process. As instructor Chiu-Ki Chan shows how to build the app, she explores the differences between JVM and on-device tests, explaining when to use each one. She also explores advanced techniques such as the MVP pattern. By demonstrating how testing fits into an app development workflow, she helps you bolster your ability to catch bugs—and determine where and when you should test.
- Why test?
- Local vs. on-device
- Code coverage
- UI testing
- RecyclerView
- Hermetic environment
- Dependency injection
- Testing with MVP
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m
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1. Testing Considerations
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Why test?1m 10s
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Types of tests1m 10s
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Local vs. on-device4m 54s
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2. Test as You Go
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The sample app1m 32s
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Smallest unit first2m 20s
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Code coverage5m 20s
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3. UI Testing
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RecyclerView7m
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RecipeActivity: Layout2m 38s
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Vector drawable: Create3m 7s
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Vector drawable: Use2m 8s
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SharedPreferencesFavorites5m 22s
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Favorite: OnClickListener1m 40s
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4. Hermetic Environment
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Test doubles2m 10s
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Dependency injection1m 3s
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InMemoryFavorites4m 30s
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RecipeApplication3m 18s
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TestRecipeApplication1m 51s
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CustomTestRunner2m 26s
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Test state: Setup2m 17s
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Test state: Test3m 47s
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5. Robot Pattern
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What vs. How56s
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ScreenRobot3m 4s
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RecipeRobot6m 12s
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Clear favorites6m 55s
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Separation of concerns1m 40s
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6. Model-View-Presenter
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Introduction1m 19s
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Refactor: Load recipe2m 58s
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Refactor: Show error6m 1s
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Refactor: Show recipe7m 6s
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Refactor: Toggle favorite3m 31s
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Mockito: Intro1m 18s
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Mockito: Setup4m 29s
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Testing with MVP: Exception2m 26s
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Summary1m 14s
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Conclusion
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Next steps23s
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Video: Local vs. on-device