### Question:
StaggeredAnimationGroup extends Group { public final void setPartialDelay(int partialDelay) { this.partialDelay = partialDelay; } StaggeredAnimationGroup(Context context);  StaggeredAnimationGroup(Context context, AttributeSet attrs);  StaggeredAnimationGroup(Context context, AttributeSet attrs, int defStyleAttr); final void show(); final void show(boolean inReversedOrder); final void hide(); final void hide(boolean inReversedOrder); final void setPartialTransitionFactory(@NonNull PartialTransitionFactory factory); final void clearPartialTransitionFactory(); final void setOnTransitionPreparedListener(@NonNull OnTransitionPreparedListener listener); final void clearOnTransitionPreparedListener(); final void setPartialDuration(int partialDuration); final void setPartialDelay(int partialDelay); final void setPartialInterpolator(TimeInterpolator partialInterpolator);  }### Answer:
@Test public void partialDelay_isModified_when_setPartialDelay_isCalled() { StaggeredAnimationGroup spiedGroup = prepareSpiedGroup(); int testDelay = 100; spiedGroup.setPartialDelay(testDelay); assertThat(spiedGroup.partialDelay).isEqualTo(testDelay); }