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from pylru import *
import random
class simplelrucache:
def __init__(self, size):
# Initialize the cache as empty.
self.cache = []
self.size = size
def __contains__(self, key):
for x in self.cache:
if x[0] == key:
return True
return False
def __getitem__(self, key):
for i in range(len(self.cache)):
x = self.cache[i]
if x[0] == key:
del self.cache[i]
self.cache.append(x)
return x[1]
assert False
def __setitem__(self, key, obj):
for i in range(len(self.cache)):
x = self.cache[i]
if x[0] == key:
x[1] = obj
del self.cache[i]
self.cache.append(x)
return
if len(self.cache) == self.size:
self.cache = self.cache[1:]
self.cache.append([key, obj])
return
def __delitem__(self, key):
for i in range(len(self.cache)):
if self.cache[i][0] == key:
del self.cache[i]
return
return
def basictest():
a = lrucache(128)
b = simplelrucache(128)
for i in range(500):
x = random.randint(0, 512)
y = random.randint(0, 512)
a[x] = y
b[x] = y
verify(a, b)
for i in range(1000):
x = random.randint(0, 512)
if x in a:
assert x in b
z = a[x]
z += b[x]
else:
assert x not in b
verify(a, b)
for i in range(256):
x = random.randint(0, 512)
if x in a:
assert x in b
del a[x]
del b[x]
else:
assert x not in b
verify(a, b)
def verify2(x, q, n):
for i in range(n):
tmp1 = None
tmp2 = None
try:
tmp1 = x[i]
except KeyError:
tmp1 = None
try:
tmp2 = q[i]
except KeyError:
tmp2 = None
assert tmp1 == tmp2
def wraptest():
q = dict()
x = lruwrap(q, 32)
for i in range(256):
a = random.randint(0, 128)
b = random.randint(0, 256)
x[a] = b
verify2(x, q, 128)
def wraptest2():
q = dict()
x = lruwrap(q, 32, True)
for i in range(256):
a = random.randint(0, 128)
b = random.randint(0, 256)
x[a] = b
x.sync()
verify2(x, q, 128)
def wraptest3():
q = dict()
with lruwrap(q, 32, True) as x:
for i in range(256):
a = random.randint(0, 128)
b = random.randint(0, 256)
x[a] = b
verify2(x, q, 128)
@lrudecorator(25)
def square(x):
return x*x
def testDecorator():
for i in range(500):
x = random.randint(0, 100)
assert square(x) == x*x
def verify(a, b):
q = []
z = a.head
for j in range(len(a.table)):
q.append([z.key, z.obj])
z = z.next
if q != b.cache[::-1]:
assert False
if __name__ == '__main__':
random.seed()
basictest()
wraptest()
wraptest2()
wraptest3()
testDecorator()
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