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"""Stress test diskcache.persistent.Deque."""
import collections as co
import functools as ft
import random
import diskcache as dc
OPERATIONS = 1000
SEED = 0
SIZE = 10
functions = []
def register(function):
functions.append(function)
return function
def lencheck(function):
@ft.wraps(function)
def wrapper(sequence, deque):
assert len(sequence) == len(deque)
if not deque:
return
function(sequence, deque)
return wrapper
@register
@lencheck
def stress_get(sequence, deque):
index = random.randrange(len(sequence))
assert sequence[index] == deque[index]
@register
@lencheck
def stress_set(sequence, deque):
index = random.randrange(len(sequence))
value = random.random()
sequence[index] = value
deque[index] = value
@register
@lencheck
def stress_del(sequence, deque):
index = random.randrange(len(sequence))
del sequence[index]
del deque[index]
@register
def stress_iadd(sequence, deque):
values = [random.random() for _ in range(5)]
sequence += values
deque += values
@register
def stress_iter(sequence, deque):
assert all(alpha == beta for alpha, beta in zip(sequence, deque))
@register
def stress_reversed(sequence, deque):
reversed_sequence = reversed(sequence)
reversed_deque = reversed(deque)
pairs = zip(reversed_sequence, reversed_deque)
assert all(alpha == beta for alpha, beta in pairs)
@register
def stress_append(sequence, deque):
value = random.random()
sequence.append(value)
deque.append(value)
@register
def stress_appendleft(sequence, deque):
value = random.random()
sequence.appendleft(value)
deque.appendleft(value)
@register
@lencheck
def stress_pop(sequence, deque):
assert sequence.pop() == deque.pop()
register(stress_pop)
register(stress_pop)
@register
@lencheck
def stress_popleft(sequence, deque):
assert sequence.popleft() == deque.popleft()
register(stress_popleft)
register(stress_popleft)
@register
def stress_reverse(sequence, deque):
sequence.reverse()
deque.reverse()
assert all(alpha == beta for alpha, beta in zip(sequence, deque))
@register
@lencheck
def stress_rotate(sequence, deque):
assert len(sequence) == len(deque)
steps = random.randrange(len(deque))
sequence.rotate(steps)
deque.rotate(steps)
assert all(alpha == beta for alpha, beta in zip(sequence, deque))
def stress(sequence, deque):
for count in range(OPERATIONS):
function = random.choice(functions)
function(sequence, deque)
if count % 100 == 0:
print('\r', len(sequence), ' ' * 7, end='')
print()
def test():
random.seed(SEED)
sequence = co.deque(range(SIZE))
deque = dc.Deque(range(SIZE))
stress(sequence, deque)
assert all(alpha == beta for alpha, beta in zip(sequence, deque))
if __name__ == '__main__':
test()
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