@Test
public void addView_shouldClearViewAfterNumAccesses() {
// Access 1 time
subject.addView(view, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(1);
// Access 2-49 times
for (int i = 0; i < VisibilityTracker.NUM_ACCESSES_BEFORE_TRIMMING - 2; ++i) {
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
}
assertThat(trackedViews).hasSize(2);
// 50th time
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(2);
// 51-99
for (int i = 0; i < VisibilityTracker.NUM_ACCESSES_BEFORE_TRIMMING - 1; ++i) {
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
}
assertThat(trackedViews).hasSize(2);
// 100
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(1);
}
@Test
public void destroy_shouldCallClear_shouldRemoveListenerFromDecorView() throws Exception {
Activity activity1 = mock(Activity.class);
Window window = mock(Window.class);
View decorView = mock(View.class);
ViewTreeObserver viewTreeObserver = mock(ViewTreeObserver.class);
when(activity1.getWindow()).thenReturn(window);
when(window.getDecorView()).thenReturn(decorView);
when(decorView.getViewTreeObserver()).thenReturn(viewTreeObserver);
when(viewTreeObserver.isAlive()).thenReturn(true);
subject = new VisibilityTracker(activity1, trackedViews, visibilityChecker, visibilityHandler);
subject.addView(view, MIN_PERCENTAGE_VIEWED);
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(2);
subject.destroy();
assertThat(trackedViews).isEmpty();
verify(visibilityHandler).removeMessages(0);
verify(viewTreeObserver).removeOnPreDrawListener(any(OnPreDrawListener.class));
assertThat(subject.mOnPreDrawListener).isNull();
}
@Test
public void removeView_shouldRemoveFromTrackedViews() throws Exception {
subject.addView(view, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(1);
assertThat(trackedViews).containsKey(view);
subject.removeView(view);
assertThat(trackedViews).isEmpty();
}
@Test
public void
clear_shouldRemoveAllViewsFromTrackedViews_shouldRemoveMessagesFromVisibilityHandler_shouldResetIsVisibilityScheduled()
throws Exception {
subject.addView(view, MIN_PERCENTAGE_VIEWED);
subject.addView(view2, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(2);
subject.clear();
assertThat(trackedViews).isEmpty();
verify(visibilityHandler).removeMessages(0);
}
@Test
public void visibilityRunnable_run_withVisibleView_shouldCallOnVisibleCallback()
throws Exception {
subject.addView(view, MIN_PERCENTAGE_VIEWED);
subject.new VisibilityRunnable().run();
verify(visibilityTrackerListener)
.onVisibilityChanged(Lists.newArrayList(view), Lists.<View>newArrayList());
}
@Test
public void visibilityRunnable_run_withNonVisibleView_shouldCallOnNonVisibleCallback()
throws Exception {
when(view.getVisibility()).thenReturn(View.INVISIBLE);
subject.addView(view, MIN_PERCENTAGE_VIEWED);
subject.new VisibilityRunnable().run();
ArgumentCaptor<List> visibleCaptor = ArgumentCaptor.forClass(List.class);
ArgumentCaptor<List> invisibleCaptor = ArgumentCaptor.forClass(List.class);
verify(visibilityTrackerListener)
.onVisibilityChanged(visibleCaptor.capture(), invisibleCaptor.capture());
assertThat(visibleCaptor.getValue().size()).isEqualTo(0);
assertThat(invisibleCaptor.getValue().size()).isEqualTo(1);
}
@Before
public void setUp() throws Exception {
trackedViews = new WeakHashMap<View, TrackingInfo>();
visibilityChecker = new VisibilityChecker();
activity = new Activity();
view = createViewMock(View.VISIBLE, 100, 100, 100, 100, true, true);
view2 = createViewMock(View.VISIBLE, 100, 100, 100, 100, true, true);
// Add a proxy listener to that makes a safe copy of the listener args.
VisibilityTrackerListener proxyListener =
new VisibilityTrackerListener() {
@Override
public void onVisibilityChanged(List<View> visibleViews, List<View> invisibleViews) {
ArrayList<View> safeVisibleViews = new ArrayList<View>(visibleViews);
ArrayList<View> safeInVisibleViews = new ArrayList<View>(invisibleViews);
visibilityTrackerListener.onVisibilityChanged(safeVisibleViews, safeInVisibleViews);
}
};
subject = new VisibilityTracker(activity, trackedViews, visibilityChecker, visibilityHandler);
subject.setVisibilityTrackerListener(proxyListener);
// XXX We need this to ensure that our SystemClock starts
ShadowSystemClock.uptimeMillis();
}
@Test(expected = AssertionError.class)
public void addView_whenViewIsNull_shouldThrowNPE() throws Exception {
subject.addView(null, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).isEmpty();
}
@Test
public void addView_withVisibleView_shouldAddVisibleViewToTrackedViews() throws Exception {
subject.addView(view, MIN_PERCENTAGE_VIEWED);
assertThat(trackedViews).hasSize(1);
}