def test_peek(m_eq, m_lbh, m_hbl):
assert isinstance(m_eq.peek(), type(None))
assert m_lbh.peek() == -1
assert m_hbl.peek() == -1
# Only low priority items in the list.
q = Priority_Queue(2)
q.insert('eh', 1)
assert q.peek() == 'eh'
q.insert('again', 1)
assert q.peek() == 'eh'
def test_insert_into_empty_queue():
pq = Priority_Queue()
pq.insert(PNode("thirty", 30))
assert pq.peek() == "thirty"
def test_insert_into_empty_queue():
pq = Priority_Queue()
pq.insert(PNode('thirty', 30))
assert pq.peek() == 'thirty'
