def test_is_empty():
"""Ensure that is_empty reports emptiness as expected"""
empty_aggregate_feed = AggregateFeed()
non_empty_aggregate_feed = AggregateFeed()
non_empty_aggregate_feed.add("foo")
assert empty_aggregate_feed.is_empty() is True
assert non_empty_aggregate_feed.is_empty() is False
def test_add():
"""Add a xkcd_feed entry to the aggregate"""
entry = Mock()
subject = AggregateFeed()
subject.add(entry)
assert_equals(set([entry]), subject.entries)
def test_is_empty():
"""Unsure is empty works"""
aggregate_feed = AggregateFeed()
assert aggregate_feed.is_empty()
aggregate_feed.add("foo")
assert not aggregate_feed.is_empty()