def test06count(self):
'QueueNull.count()'
qn = QueueNull()
qn.add('foo1')
assert qn.count() == 0
qn.add('foo2')
assert qn.count() == 0
def test02add(self):
'QueueNull.add()'
data = 'foo bar'
qn = QueueNull()
elem = qn.add(data)
assert elem == ""
