如何对具有View Animators的Android代码进行单元测试？

public static void regularFadeView(final Boolean show,final View view) {
    view.animate()
            .seTinterpolator(mDecelerateInterpolator)
            .alpha(show ? 1 : 0)
            .setListener(new SimpleAnimatorListener() {
                @Override
                public void onAnimationStart(Animator animation) {
                    if (show) view.setVisibility(View.VISIBLE);
                }

                @Override
                public void onAnimationEnd(Animator animation) {
                    if (!show) view.setVisibility(View.INVISIBLE);
                }
            })
            .start();
}

我认为你可以解决这个问题,重新安排方法.这是通过将SimpleAnimatorListener提取到受保护变量,然后基于该单元进行单元测试.就像是：

@VisibleForTesTing
SimpleAnimatorListener getAnimationListener(Boolean show,View view) {
   return new SimpleAnimatorListener() {
        @Override
        public void onAnimationStart(Animator animation) {
            if (show) view.setVisibility(View.VISIBLE);
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            if (!show) view.setVisibility(View.INVISIBLE);
        }
    }

public static void regularFadeView(Boolean show,View view) {
     view.animate()
        .seTinterpolator(mDecelerateInterpolator)
        .alpha(show ? 1 : 0)
        .setListener(getAnimationListener(show,view))
        .start();
}

然后在你的测试：

private void shouldShowViewWhenShowIsTrue() {
     View mockedView = mockito.mock(View.class);
     SimpleAnimatorListener animationListener = getAnimationListener(true,mockedView);
     animationlistener.onAnimationStart(null);
     mockito.verify(mockedView).setVisibility(View.VISIBLE);
}

更好的方法是使用getAnimationListener()等方法来创建一个扩展SimpleAnimatorListener的FadeAnimationListener,并将动画逻辑放在那里.

希望这可以帮助！