'Test the aggregated feed by comparing the aggregator class
to the output of the feed'

@implementation
def test_add_activity(self):

    for activity in self.activities:
        self.test_feed.insert_activity(activity)
        self.test_feed.add(activity)
    results = self.test_feed[:3]
    aggregator = self.test_feed.get_aggregator()
    aggregated_activities = aggregator.aggregate(self.activities)
    assert (results[0].actor_ids == aggregated_activities[0].actor_ids)
