def test_spy():
"""Test the measure spy working.
"""
q = Queue()
data = TaskDatabase()
spy = MeasureSpy(queue=q, observed_database=data,
observed_entries=('test',))
data.notifier(('test', 1))
assert q.get()
data.notifier(('test2', 1))
assert q.empty()
spy.close()
assert q.get() == ('', '')
