def test_buffer_fill_size_return(self):
'''
Test that buffer fill size is
correctly returned under various
use scenarios
'''
# Test that buffer fill size is returned as
# 0 when buffer is empty
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
fill_size = buffer.get_buffer_fill()
self.assertEqual(fill_size, 0)
# Test that buffer fill size is returned as
# the number of elements pushed when the
# buffer is neither empty nor full
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
for i in range(0, int(random_size / 2)):
buffer.push(i)
fill_size = buffer.get_buffer_fill()
self.assertEqual(fill_size, int(random_size / 2))
# Test that buffer fill size is correctly
# returned when buffer is full
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
for i in range(0, random_size):
buffer.push(i)
fill_size = buffer.get_buffer_fill()
self.assertEqual(fill_size, random_size)
def test_push(self):
'''
Test that buffer push works
'''
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
buffer.push(0)
def test_pop(self):
'''
Test that buffer pop returns pushed value
'''
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
buffer.push(0)
returned_element = buffer.pop()
self.assertEqual(returned_element, 0)
def test_get_capacity(self):
'''
Test that get_capacity method
returns correct values
'''
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
for i in range(0, random.randrange(1, random_size)):
buffer.push(i)
buffer_capacity = buffer.get_capacity()
self.assertEqual(buffer_capacity, random_size)
def test_push_full_fail(self):
'''
Test that pushing into a full
buffer raises Runtime Exception
and the "buffer full" message
'''
with pytest.raises(RuntimeError) as excinfo:
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
for i in range(0, random_size + 1):
buffer.push(i)
self.assertEqual(str(excinfo.value), 'Buffer is full!')
def test_clear(self):
'''
Test that clear() method clears
the buffer properly
'''
random_size = random.randrange(1, 100)
buffer = RingBuffer(random_size)
for i in range(0, random.randrange(1, random_size)):
buffer.push(i)
buffer.clear()
self.assertTrue(buffer.is_empty())
self.assertFalse(buffer.is_full())
self.assertEqual(buffer.get_capacity(), random_size)
self.assertEqual(buffer.get_buffer_fill(), 0)