Join Chiu-Ki Chan for an in-depth discussion in this video RecipeActivityTest: An espresso test, part of Effective Android Testing for Mobile Developers.
- [Instructor] So far, we have been…adding functionalities to our app.…Let's write some tests to make sure…that it is behaving as expected.…We will be using the Espresso library,…which we already included as a dependency…when we wrote our instrumentation unit test.…At that point, we only used Espresso…to get access to the context.…Espresso also lets us simulate user actions,…such as typing and clicking,…and also verify the state of the UI.…
We will create an Espresso test for recipe activity.…Scroll up, and point your cursor to recipe activity.…Press command shift T to create a new test.…Press okay, and then select the folder Android Test,…because we want to run it on an android device.…The first thing we need is a test rule.…At rule, and then public, activity test rule.…
After, type recipe activity.…We will call this variable activity rule.…Initialize it by calling new activity test rule,…delete the type, because we don't need it.…We will need to give it three parameters.…The first one is the class of activity we want to use.…
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There'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
- Hermetic environment
- Dependency injection
- Testing with MVP
Skill Level Intermediate
1. Testing Considerations
2. Test as You Go
3. UI Testing
4. Hermetic Environment
5. Robot Pattern
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