def test_get_related_deals_returns_empty_list_upon_exception(Redis):
(u"Get related deals should return an empty list if "
"redis raises an exception")
# Given an instance of Redis connection
connection = Redis.return_value
# And that by calling connection.zrange it raises an exception
connection.zrange.side_effect = ConnectionError("BOOM!")
# When I get related deals from a given deal
deal = Deal()
deal.id = 55
related_deals = deal.get_related_deals()
# Then related deals is an empty list
related_deals.should.equal([])
# And zrange was called appropriately
connection.zrange.assert_called_once_with(
"yipit:related-deals:55", 0, -1,
)
def test_get_related_deals_from_redis(Redis, deal_queryset):
(u"Get related deals should fetch data from redis")
# Given an instance of Redis connection
connection = Redis.return_value
# And that by calling connection.zrange it returns a list of ids
connection.zrange.return_value = [777]
# And that by Deal.objects.get it returns a Fake deal
deal_queryset.get.return_value = "Deal wannabe"
# When I get related deals from a given deal
deal = Deal()
deal.id = 42
related_deals = deal.get_related_deals()
# Then related deals is a list of one faked deal
related_deals.should.equal(["Deal wannabe"])
# And zrange was called appropriately
connection.zrange.assert_called_once_with(
"yipit:related-deals:42", 0, -1,
)