Join Chiu-Ki Chan for an in-depth discussion in this video Dependency injection, part of Effective Android Testing for Mobile Developers.
- [Instructor] Dependency injection sounds really fancy, but at the core, what it means is that when the class needs a dependency, instead of creating it itself, it asks someone else to provide it. In our case, in recipe activity, you can see that in line 35 we are creating shared preferences favorites itself. We will pull that out so that it is provided by the application instead. After the dependency favorite is outside activity, we can slap in a different one during testing.
In Android, you can subclass the application to override the provide method. To use this test application, we will also need a custom test runner. I know this is a lot to take in. We'll build up step-by-step during the demo and I'll explain each part again as we do it. Next we're going to start with the first step, which is in memory favorites.
- Why test?
- Local vs. on-device
- Code coverage
- UI testing
- Hermetic environment
- Dependency injection
- Testing with MVP
Skill Level Intermediate
Android App Development: Unit Testingwith James P White2h 58m Intermediate
Android Studio Essential Trainingwith David Gassner3h 41m Beginner
Android App Development: Data Persistence Librarieswith Annyce Davis4h 52m Intermediate
1. Testing Considerations
2. Test as You Go
3. UI Testing
4. Hermetic Environment
5. Robot Pattern
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