def test_rollover(self):
cb = CircularBuffer(5, ['A', 'B', 'C', 'D', 'E'])
assert cb.front() == 'A'
assert cb.length() == 5
assert cb.is_full() is True
cb.enqueue('X')
assert cb.front() == 'X'
assert cb.length() == 5
assert cb.is_full() is True
def test_is_full(self):
c = CircularBuffer(3)
assert c.is_full() is False
c.enqueue('A')
assert c.is_full() is False
c.enqueue('B')
assert c.is_full() is False
c.enqueue('C')
assert c.is_full() is True
c.dequeue()
assert c.is_full() is False
def test_is_full(self):
cb = CircularBuffer(3)
assert not cb.is_full()
cb.enqueue('test')
assert not cb.is_full()
cb.enqueue('other test')
assert not cb.is_full()
cb.enqueue(12345)
assert cb.is_full()
cb.dequeue()
assert not cb.is_full()
def test_init(self):
c = CircularBuffer(3)
assert c.max_size == 3
assert c.size == 0
assert c.start == 0
assert c.end == 0
assert c.is_empty() is True
assert c.is_full() is False
def test_enqueue(self):
cb = CircularBuffer(4)
cb.enqueue(3)
assert cb.size == 1
assert len(cb) == 4
assert cb.is_empty() == False
cb.enqueue(1)
assert cb.size == 2
cb.enqueue(4)
assert cb.size == 3
cb.enqueue(1)
assert cb.size == 4
assert cb.is_full() == True
cb.enqueue(5)
assert cb.size == 4
def test_enqueue(self):
c = CircularBuffer(3)
c.enqueue('A')
assert c.size == 1
assert c.start == 0
assert c.end == 1
assert c.front() == 'A'
c.enqueue('B')
assert c.size == 2
assert c.start == 0
assert c.end == 2
assert c.front() == 'A'
c.enqueue('C')
assert c.size == 3
assert c.start == 0
assert c.end == 0
assert c.front() == 'A'
assert c.is_full() is True
with self.assertRaises(ValueError):
c.enqueue('D')