def test_dequeue_empty_after_multiple_dequeue():
q = PseudoQueue()
q.enqueue('monkey')
q.enqueue('business')
q.dequeue()
q.dequeue()
with pytest.raises(InvalidOperationError) as e:
q.dequeue()
assert str(e.value) == 'Method not allowed on an empty collection'
def test_enqueue_first_node():
q = PseudoQueue()
q.enqueue('monkey')
actual1 = q.front.peek()
expected1 = 'monkey'
assert actual1 == expected1
actual2 = q.rear.peek()
expected2 = 'monkey'
assert actual2 == expected2
def test_peek_2():
q = Queue()
q.enqueue("apple")
q.enqueue("banana")
q.enqueue("cucumber")
actual = q.peek()
expected = "apple"
assert actual == expected
def test_peek():
q = PseudoQueue()
q.enqueue("apple")
q.enqueue("banana")
q.enqueue("cucumber")
actual = q.stack1.peek()
expected = "apple"
assert actual == expected
def test_peek_post_dequeue():
q = PseudoQueue()
q.enqueue("apples")
q.enqueue("bananas")
q.dequeue()
actual = q.stack1.peek()
expected = "bananas"
assert actual == expected
def test_dequeue():
q = PseudoQueue()
q.enqueue("apple")
q.enqueue("banana")
actual = q.dequeue()
expected = "apple"
assert actual == expected
def test_dequeue_when_full():
q = PseudoQueue()
q.enqueue("apples")
q.enqueue("bananas")
actual = q.dequeue()
expected = "apples"
assert actual == expected
def test_dequeue_one():
q = PseudoQueue()
q.enqueue('monkey')
q.enqueue('business')
actual1 = q.dequeue()
expected1 = 'monkey'
assert actual1 == expected1
def test_pseudoqueue_enqueue_several():
q = PseudoQueue()
q.enqueue("orange")
q.enqueue("apple")
actual = q.input.peek()
expected = "apple"
assert actual == expected
def queue_test():
queue = PseudoQueue()
queue.enqueue(4)
queue.enqueue(3)
queue.enqueue(2)
queue.enqueue(1)
return queue
def test_enqueue_two():
q = PseudoQueue()
q.enqueue("apples")
q.enqueue("bananas")
actual = q.stack1.peek()
expected = "apples"
assert actual == expected
def test_peek_when_empty():
q = Queue()
with pytest.raises(InvalidOperationError):
q.peek()
def test_enqueue_one():
q = Queue()
q.enqueue("apples")
actual = q.peek()
expected = "apples"
assert actual == expected
def test_front_stack_empty(): q = PseudoQueue() assert q.front.top == None
def test_dequeue_empty_on_instantiate():
q = PseudoQueue()
with pytest.raises(InvalidOperationError) as e:
q.dequeue
assert str(e.value) == 'Method not allowed on an empty collection'
def test_enqueue_two():
q = PseudoQueue()
q.enqueue('monkey')
q.enqueue('business')
assert q.front.peek() == 'monkey'
assert q.rear.peek() == 'business'
def test_exhausted():
q = PseudoQueue()
q.enqueue("apple")
q.enqueue("banana")
q.enqueue("cucumber")
q.dequeue()
q.dequeue()
q.dequeue()
actual = q.stack1.is_empty()
expected = True
assert actual == expected
def test_enqueue():
q = Queue()
q.enqueue("apple")
actual = q.front.value
expected = "apple"
assert actual == expected
def test_pseudoqueue_dequeue_one():
q = PseudoQueue()
q.enqueue("orange")
actual = q.dequeue()
expected = "orange"
assert actual == expected
def test_dequeue_when_empty():
q = PseudoQueue()
with pytest.raises(InvalidOperationError):
q.dequeue()
def test_enqueue():
q = PseudoQueue()
q.enqueue("apple")
actual = q.stack1.top.value
expected = "apple"
assert actual == expected
def test_peek_when_empty():
q = PseudoQueue()
with pytest.raises(InvalidOperationError):
q.stack1.peek()
def test_pseudoqueue_dequeue_several():
q = PseudoQueue()
q.enqueue("orange")
q.enqueue("apple")
q.enqueue("lime")
q.dequeue()
q.dequeue()
actual = q.dequeue()
expected = "orange"
assert actual == expected
def test_is_empty():
q = PseudoQueue()
actual = q.stack1.is_empty()
expected = True
assert actual == expected
def test_queue_enqueue():
expected = "5"
queue = PseudoQueue()
queue.enqueue(5)
actual = f"{queue}"
assert actual == expected
def test_is_empty():
q = Queue()
actual = q.is_empty()
expected = True
assert actual == expected