How do you run a Robolectric test?
3. Exercise: Using Robolectric and Android Studio to test your activity
- 3.1. Project setup. Create an application called com.
- 3.2. Activity to test. Adjust your activity to the following:
- 3.3. Create a unit test for the ativity.
- 3.4. Create the run configuration.
- 3.5. Extend the tests.
Is Robolectric deprecated?
At some point the Robolectric equivalents will be deprecated and removed. Using the AndroidX Test APIs reduces the cognitive load for you as a developer, with just one set of APIs to learn for the same Android concept, no matter if you are writing an Robolectric test or an instrumentation test.
Is Robolectric unit test?
Unlike traditional emulator-based Android tests, Robolectric tests run inside a sandbox which allows the Android environment to be precisely configured to the desired conditions for each test, isolates each test from its neighbors, and extends the Android framework with test APIs which provide minute control over the …
What is the significance of Robolectric?
Robolectric provides a JVM compile version of the android. jar file. Robolectric handles views, resource loading, and many other things that are implemented in the Android native. This enables you to run your Android tests in your development environment, without requiring any other setup to run the test.
How do you write a Robolectric test case?
First, add Robolectric using Gradle or Maven. To write a test, create a Java Class in your project test folder. Add RunWith and Config annotations. Use a Before annotation for setting up your activity, and use Test annotations for each test stub.
Where do Robolectric properties go?
properties File. To configure all Robolectric tests within a package or group of packages, create a file named robolectric. properties in the appropriate package. Generally, this file would be placed within the appropriate package directory under src/test/resources in your project tree.
What is AndroidX test?
AndroidX Test is a collection of Jetpack libraries that lets you run tests against Android apps. It also provides a series of tools to help you write these tests. For example, AndroidX Test provides JUnit4 rules to start activities and interact with them in JUnit4 tests.
What is activity test rule?
When launchActivity is set to true in the constructor, the Activity under test will be launched before each test annotated with Test and before methods annotated with Before , and it will be terminated after the test is completed and methods annotated with After are finished.
What is Robolectric shadow?
Robolectric works by creating a runtime environment that includes the real Android framework code. This means when your tests or code under test calls into the Android framework you get a more realistic experience as for the most part the same code is executed as would be on a real device.
What are shadows in Robolectric?
Robolectric fills these gaps with a set of classes known as Shadows. Each shadow can modify or extend the behavior of a corresponding class in the Android OS. When an Android class is instantiated, Robolectric looks for a corresponding shadow class, and if it finds one it creates a shadow object to associate with it.
How do you get context in Robolectric?
To get application context you must do the following:
- annotate @RunWith(RobolectricTestRunner. class)
- RuntimeEnvironment. application. getApplicationContext()