How to test animation

[Adam Styrc]

Hello,
I'd like to test my UI properties such as Views visibility. The actions of showing/hiding views are wrapped into Animations. How to test it ?
I tried to use ShadowSystemClock.sleep() method to wait until animation ends but it doesn't seem to work as I expected.

    @Test
    public void testHideSearch() throws Exception {
        mListFragment.hideSearch();                                                     //<--- animation launched here
        sleep(1000);
        View searchEditText = mListFragment.getView().findViewById(R.id.filterEditText);
        assertFalse(searchEditText.getVisibility() == View.VISIBLE);
    }

What is the correct approach to the issue ?

[Graham Holker]

Hey Adam,

Try: Robolectric.getUiThreadScheduler().advanceBy(1000);

Hope this helps,

Graham

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Graham Holker

Agile Engineer 

Pivotal Labs, Toronto

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416.574.1384

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[Adam Styrc]

That's exactly what ShadowSystemClock.sleep() does ;)

Not solving problem.

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[Graham Holker]

Ah, my bad. AdvanceBy has worked for me.

Can you give more information about the animation? Where do you change the visibility of the view?

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Graham Holker

Agile Engineer 

Pivotal Labs, Toronto

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[Adam Styrc]

    public void hideSearch() {
        Animation animation = AnimationUtils.loadAnimation(getActivity(), R.anim.slide_in_top);
        mSearchEditTextContainer.startAnimation(animation);

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

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                mSearchEditTextContainer.setVisibility(View.INVISIBLE);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
    }

And R.anim.slide_in_top is:

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="200"
        android:fromYDelta="0%"
        android:toYDelta="-100%" />
    <alpha
        android:duration="200"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>

[Graham Holker]

You can use the ShadowAnimation to trigger the animation end callback.

shadowOf(view.getAnimation()).invokeEnd();

If you use animators (instead of Animation) the sleep or advanceBy should work. 

I wrote these tests to verify, so I'm including them for reference: 

   @Test
    public void testAnimation() {
        final boolean[] hasRun = {false};

 

        Animation animation = AnimationUtils.makeOutAnimation(Robolectric.application, true);
        animation.setDuration(200);

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

                hasRun[0] = true;

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

        View view = new View(Robolectric.application);
        view.startAnimation(animation);
        shadowOf(view.getAnimation()).invokeEnd();

 

        assertThat(hasRun[0]).isTrue();
    }

    @Test
    public void testAnimator() {
        final boolean[] hasRun = {false};

 

        View view = new View(Robolectric.application);
        ValueAnimator animator = ObjectAnimator.ofFloat(view, "alpha", 0, 1)
                .setDuration(200);
        animator.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {
            }
            @Override
            public void onAnimationEnd(Animator animator) {
                hasRun[0] = true;
            }
            @Override
            public void onAnimationCancel(Animator animator) {
            }
            @Override
            public void onAnimationRepeat(Animator animator) {
            }
        });
        animator.start();
        Robolectric.getUiThreadScheduler().advanceBy(200);
        
        assertThat(hasRun[0]).isTrue();
    }

--

Graham Holker

Agile Engineer 

Pivotal Labs, Toronto

gho...@pivotallabs.com

416.574.1384

[Adam Styrc]

invokeEnd() works as desired. Thanks ! :)

[Graham Holker]

Cheers :)

--

Graham Holker

Agile Engineer 

Pivotal Labs, Toronto

gho...@pivotallabs.com

416.574.1384

[stanisl...@theappbusiness.com]

Robolectric no more supports shadowOf(Animation)

any ideas how to replace it?

Cheers :)

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[Jonathan Gerrish]

What are you trying to test?

Can you show an example of some code you'd ideally like to write but can't right now?

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[stanisl...@theappbusiness.com]

Yeah, sorry for replying so late (easter holidays).

So this thread suggested to use shadowOf(animationObject).invokeEnd() in order to invoke end to an animation which runs runtime while testing with robolectric.

I need to invoke end so that I can test that the view has full alfa after the animation ends, like this:

(animation gets triggered: alpha 0 -> 1 in 500ms

    shadowOf(loadingIndicator!!.animation).invokeEnd()
    assertThat(loadingIndicator!!.alpha).isEqualTo(1f)

However, since animation object cannot be a shadow I'm unable to do that and I'm stuck on this and no other approaches seem to work for me.

shadowOf supports so many things from Choreographer to TextToSpeech objects, but no Animation (If I go to class Shadows.java and search for word "Anim" I won't find anything). 

[stanisl...@theappbusiness.com]

I have also tried

    Robolectric.getForegroundThreadScheduler().advanceBy(1000, TimeUnit.MILLISECONDS)
    Robolectric.flushBackgroundThreadScheduler()

and 

getShadowMainLooper().idle(1, TimeUnit.SECONDS)

with no luck.

The animation looks like:

ObjectAnimator.ofFloat(ins_loading_view, "alpha", 1f).apply {
    duration = INS_LOADING_APPEAR_DUR
    start()
}

and I just want to test, that the result of the animation is that the alpha of the view is 1f.

Help please

[stanisl...@theappbusiness.com]

Ok, I have also tried

shadowOf(Looper.getMainLooper()).idle(1, TimeUnit.SECONDS)

and was looking for shadowOf(animation) in add-on dependencies of Robolectric 4.

Still no luck