def calc_similar_podcasts(podcast, num=20):
"""
calculates and returns a list of podcasts that seem to be similar
to the given one.
Probably an expensive operation
"""
users = subscribed_users(podcast)
podcasts = Counter()
for user_id in users:
user_subscriptions = subscribed_podcast_ids_by_user_id(user_id)
user_counter = Counter(user_subscriptions)
podcasts.update(user_counter)
return podcasts.most_common(num)
def test_merge_podcasts(self):
self.podcast2.subscribe(self.user, self.device)
# merge podcast2 into podcast1
pm = PodcastMerger([self.podcast1, self.podcast2], Counter(), [])
pm.merge()
# seems that setting delayed_commit = false in the CouchDB config, as
# well as a delay here fix the intermittent failures.
# TODO: further investiation needed
import time
time.sleep(2)
# get podcast for URL of podcast2 and unsubscribe from it
p = podcast_for_url(self.P2_URL)
p.unsubscribe(self.user, self.device)
subscriptions = subscribed_podcast_ids_by_user_id(self.user._id)
self.assertEqual(0, len(subscriptions))
