What is ActivityTestRule

Defining ActivityTestRule

• This rule is used to launch an activity in instrumentation testing.
• Basically this test rule provides functional testing of a single activity.

Gradle

androidTestImplementation ‘com.android.support.test:rules:1.0.2’

Usage in code

// Global declaration
@Rule
public ActivityTestRule<SampleActivity> activityRule = new ActivityTestRule<>(SampleActivity.class, true, false);

// In Each test or in the @before block
Intent i = new Intent(activityRule.getActivity(), SampleActivity.class);
activityRule.launchActivity(i);