Jake Wharton ActivityRule -> Support Lib ActivityTestRule

gistfile1.java

import android.app.Activity;
import android.content.Intent;
import android.support.test.InstrumentationRegistry;
import android.support.test.rule.ActivityTestRule;

/**
 * Matches the intent returned by Jake Wharton's ActivityRule but is layered on top of new support lib rules
 *
 * @see {https://gist.github.com/JakeWharton/1c2f2cadab2ddd97f9fb}
 * @see {https://code.google.com/p/android-test-kit/wiki/JUnit4RulesInATSL}
 */
public abstract class BaseActivityTestRule<T extends Activity> extends ActivityTestRule<T> {

    private final Class<T> activityClass;

    public BaseActivityTestRule(Class<T> activityClass) {
        super(activityClass);
        this.activityClass = activityClass;
    }

    public BaseActivityTestRule(Class<T> activityClass, boolean initialTouchMode) {
        super(activityClass, initialTouchMode);
        this.activityClass = activityClass;
    }

    public BaseActivityTestRule(Class<T> activityClass, boolean initialTouchMode, boolean launchActivity) {
        super(activityClass, initialTouchMode, launchActivity);
        this.activityClass = activityClass;
    }

    @Override
    protected Intent getActivityIntent() {
        Intent intent = super.getActivityIntent();
        intent.setClassName(getTargetPackage(), getActivityClassName());
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        return intent;
    }

    private String getTargetPackage() {
        return InstrumentationRegistry.getTargetContext().getPackageName();
    }

    private String getActivityClassName() {
        return activityClass.getClass().getName();
    }
}