def test_dequeue():
pass
q = Queue()
q.enqueue("dog")
q.dequeue()
actual = q.is_empty
expected = True
def test_peek():
q = Queue()
q.enqueue("one")
q.enqueue("two")
q.enqueue("three")
q.dequeue()
q.dequeue()
actual = q.peek()
expected = "three"
assert actual == expected
def test_dequeue_multiple():
q = Queue()
q.enqueue("one")
q.enqueue("two")
q.enqueue("three")
q.enqueue("four")
q.dequeue()
actual = q.front.val
expected = "two"
assert actual == expected
def test_dequeue_three():
shelter = Queue()
shelter.enqueue({'type': 'dog', 'name': 'fido'})
shelter.enqueue({'type': 'cat', 'name': 'mittens'})
shelter.enqueue({'type': 'dog', 'name': 'bud'})
# import pdb; pdb.set_trace()
assert shelter.dequeue('cat') == 'mittens'
assert shelter.dequeue('dog') == 'fido'
assert shelter.dequeue('dog') == 'bud'
def test_dequeue_one():
shelter = Queue()
shelter.enqueue({'type': 'dog', 'name': 'fido'})
shelter.enqueue({'type': 'cat', 'name': 'mittens'})
shelter.enqueue({'type': 'dog', 'name': 'bud'})
assert shelter.dequeue('cat') == 'mittens'
def test_dequeue_missing_cat():
shelter = Queue()
shelter.enqueue("dog")
shelter.enqueue("dog")
shelter.enqueue("dog")
shelter.enqueue("dog")
actual = shelter.dequeue("cat")
expected = "Null"
assert actual == expected
def test_dequeue_invalid_preference():
shelter = Queue()
shelter.enqueue("dog")
shelter.enqueue("dog")
shelter.enqueue("dog")
shelter.enqueue("dog")
actual = shelter.dequeue("pig")
expected = "Null"
assert actual == expected
def test_dequeue_from_empty():
shelter = Queue()
actual = shelter.dequeue("cat")
expected = "No animals available"
assert actual == expected