What is Robolectric?

What is Robolectric?

Robolectric is a framework that allows you to write unit tests and run them on a desktop JVM while still using Android API. This enables you to run your Android tests in your continuous integration environment without any additional setup. Robolectric supports resource handling, e.g., inflation of views .

What is Robolectric used for?

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.

Is Robolectric deprecated?

At some point the Robolectric equivalents will be deprecated and removed. Using the AndroidX Test APIs reduces the cognative 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.

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 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.

How do you get context in Robolectric?

To get application context you must do the following:

1. annotate @RunWith(RobolectricTestRunner. class)
2. RuntimeEnvironment. application. getApplicationContext()

What is InstantTaskExecutorRule?

InstantTaskExecutorRule is a JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which executes each task synchronously.

What is AndroidJUnit4?

Testing with AndroidJUnitRunner + AndroidJUnit4 AndroidJUnitRunner is a test runner that allows you to run JUnit3 or JUnit4 tests on Android devices. It serves as the basis for all instrumented tests and through it, we can have access to Android framework classes in our tests. Reporting test results.

How do you run a Robolectric test?

Running Robolectric Tests

1. Open the Gradle window and find testDebug under Tasks => verification.
2. Right click and select Run.

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.

How do you use shadows in Robolectric?

Custom Shadows get hooked up to Robolectric using the @Config annotation on the test class or test method, using the shadows array attribute. To use the MyShadowBitmap class mentioned in the previous section, you would annotate the test in question with @Config(shadows={MyShadowBitmap.