/** Given the history is empty, when I remove tags, then nothing happens. */
@Test
public void testRemoveTagsFromEmptyHistory() {
tagHistory = new TagHistoryView(context);
tagHistory.getAdapter().registerAdapterDataObserver(observer);
for (int i = 0; i < 3; i++) {
tagHistory.pop();
}
assertEquals("No tags are removed from an empty history", 0, observer.itemRemovedCount);
}
/**
* When I add several tags to the history, then I am notified for each one and the history has the
* correct views.
*/
@Test
public void testAddTags() {
tagHistory = new TagHistoryView(context);
tagHistory.getAdapter().registerAdapterDataObserver(observer);
for (int i = 0; i < 5; i++) {
Tag tag = new Tag(String.valueOf(i), String.valueOf(i * 2));
tagHistory.push(tag);
}
assertEquals("The correct number of tags are inserted", 5, observer.itemInsertedCount);
assertEquals(
"The history has the correct number of tags", 5, tagHistory.getAdapter().getItemCount());
}
@After
public void unregisterObservers() {
if (tagHistory != null && observer != null) {
tagHistory.getAdapter().unregisterAdapterDataObserver(observer);
}
}