def test_peek(self):
"""Test peeking at the top of the queue."""
q = PriorityQueue()
q.push('item', 0)
q.push('item2', 1)
item, priority = q.peek()
self.assertEqual((item, priority), q.peek())
q.pop()
self.assertNotEqual((item, priority), q.peek())
q.pop()
self.assertRaises(IndexError, q.pop)
def test_peek(self):
"""Test peeking at the top of the queue."""
q = PriorityQueue()
q.push('item', 0)
q.push('item2', 1)
item, priority = q.peek()
self.assertEqual((item, priority), q.peek())
q.pop()
self.assertNotEqual((item, priority), q.peek())
q.pop()
self.assertRaises(IndexError, q.pop)
