def DS_queue(self):
try:
length = int(input(" Enter the length of your Queue: "))
except:
return self.DS_queue()
# Queue instantiation with the given length
queue = Queue(length)
while True:
print(
'\n [QUEUE OPERATIONS] \n\n 1. Enqueue\n 2. Dequeue\n 3. Display\n 4. Count\n 5. Back\n'
)
try:
selectedNumber = int(input("Select a number: "))
except:
print("\nPlease enter a valid input\n")
input("Press [Enter] to continue...")
self.DS_queue()
if selectedNumber == 1:
value = int(
input("Enter the value that you want to enqueue: "))
queue.enqueue(value)
print("Success!")
input("Press [Enter] to continue...")
elif selectedNumber == 2:
queue.dequeue()
print("Success!")
input("Press [Enter] to continue...")
elif selectedNumber == 3:
queue.display()
input("Press [Enter] to continue...")
elif selectedNumber == 4:
queue.countQueue()
input("Press [Enter] to continue...")
elif selectedNumber == 5:
self.DS_main()
else:
print(
"The number you entered is not in the choices... Going back to the main screen instead..."
)
input("Press [Enter] to continue...")
self.DS_main()
def test_queue(self): queue = Queue(5) # Check instantiation default values self.assertEqual(queue.front, -1) self.assertEqual(queue.rear, -1) self.assertEqual(queue.length, 5) self.assertEqual(queue.data, [0,0,0,0,0]) self.assertEqual(queue.count, 0) # Check if isEmpty() self.assertTrue(queue.isEmpty()) # Check if isFull() self.assertFalse(queue.isFull()) # Check if enqueue operation is working properly queue.enqueue(5) self.assertEqual(queue.data, [5,0,0,0,0]) # Check count again if incremented self.assertEqual(queue.count, 1) # Check if front and rear is incremented self.assertEqual(queue.front, 0) self.assertEqual(queue.rear, 0) # Enqueue again to check if rear is working properly queue.enqueue(6) self.assertEqual(queue.rear, 1) self.assertEqual(queue.count, 2) # Check is countQueue() is working properly self.assertEqual(queue.countQueue(), 2) # Check if dequeue() is working properly queue.dequeue() self.assertEqual(queue.data, [0,6,0,0,0]) self.assertEqual(queue.count, 1)