IdlingResource implementation for Android Espresso test framework. Waits for animation end, if view has one. Useful to test views that have animations.

AnimationIdlingResource.java

package com.exsoft.musarium.entity;

import android.support.test.espresso.IdlingResource;
import android.view.View;
import android.view.animation.Animation;

/**
 * Created by Dmitriy Gorodnytskiy on 13-Jan-16.
 */
public class AnimationIdlingResource implements IdlingResource {
    private ResourceCallback callback;

    public AnimationIdlingResource(View view) {
        if(view.getAnimation() == null) {
            callback.onTransitionToIdle();
            return;
        }

        view.getAnimation().setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) { }

            @Override
            public void onAnimationEnd(Animation animation) {
                callback.onTransitionToIdle();
            }

            @Override
            public void onAnimationRepeat(Animation animation) { }
        });
    }

    @Override
    public String getName() {
        return AnimationIdlingResource.class.getName();
    }

    @Override
    public boolean isIdleNow() {
        return true;
    }

    @Override
    public void registerIdleTransitionCallback(ResourceCallback callback) {
        this.callback = callback;
    }
}