def test_queues(self):
cb = CircularBuffer()
for i in range(12):
cb.queue(i)
assert cb.read == 0
assert cb.dequeue() == 0
assert cb.read == 1
assert cb.dequeue() == 1
# Overwriting
for i in range(12):
cb.queue(i)
assert cb.read == 0
assert cb.dequeue() == 0
assert cb.read == 1
assert cb.dequeue() == 1
# Let's keep dequeueing
assert cb.dequeue() == 2
assert cb.dequeue() == 3
assert cb.dequeue() == 4
assert cb.dequeue() == 5
assert cb.dequeue() == 6
assert cb.dequeue() == 7
assert cb.dequeue() == 8
assert cb.dequeue() == 9
assert cb.dequeue() == 10
assert cb.dequeue() == 11
assert cb.dequeue() is None
assert cb.dequeue() is None
assert cb.read == 11
assert cb.write == 0
def test_write_and_read_movement(self):
cb = CircularBuffer(['A', 'B', 'C'])
assert cb.write == 3
assert cb.read == 0 # This better not be moving
cb.queue('D')
assert cb.write == 4
assert cb.read == 0
cb.dequeue() # Should not do anything
assert cb.write == 4
assert cb.read == 1
cb = CircularBuffer() # Clearing
for i in range(11):
cb.queue(i)
assert cb.write == 11
assert cb.read == 0
cb.queue(11)
assert cb.write == 0
assert cb.read == 0
assert cb.dequeue() == 0
# Should BOTH move
cb.queue(12)
assert cb.write == 1
assert cb.read == 1
assert cb.dequeue() == 1