- [Instructor] In step three,…we show an error when the recipe is null.…Look at line 35, though.…We don't know what is recipe anymore…because we're hiding it inside the presenter.…This is fine, because we will move this null check…into the presenter.…Copy line 36 to line 38.…Switch to the presenter.…Inside loadRecipe, in line 15,…we are going to add the null check here.…
If recipe equals null,…we are going to paste in the line that we copied.…And, actually, we don't need the return line,…so we can delete that.…Android Studio is not happy…because it doesn't know what is the titleView…and what is the descriptionView.…This is fair, since they are TextView…and Android-specific, and the presenter doesn't have…a handle on it.…To keep the presenter Java only,…we will need to show error via the view interface.…Open RecipeContract.…
Inside the interface view, in line five,…we will add the new function,…void showRecipeNotFoundError.…Then, we will switch back to the presenter,…and instead of directly manipulating…the title and the view,…
Author
Released
8/30/2017- Why test?
- Local vs. on-device
- Code coverage
- UI testing
- RecyclerView
- Hermetic environment
- Dependency injection
- Testing with MVP
Skill Level Intermediate
Duration
Views
Related Courses
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Android App Development: Data Persistence Libraries
with Annyce Davis4h 52m Intermediate
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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: Refactor: Show error