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test.py
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#!/usr/bin/env python
import random
import unittest
import shutil
import os
from cachefs import FileDataCache, CacheMiss, create_db, open_db
test_base = ".test_dir"
cache_base = os.path.join(test_base, 'cache.db')
try:
shutil.rmtree(cache_base)
except OSError:
pass
os.makedirs(cache_base)
db = create_db(cache_base)
test_num = 0
class TestFileDataCache(unittest.TestCase):
#decorator to give tests a cache object
def setUp(self):
self.db = db
filename = os.path.join(cache_base,self._testMethodName)
open(filename, 'a+').close()
inode_id = os.stat(filename).st_ino
self.cache = FileDataCache(self.db, cache_base, os.path.join(test_base,self._testMethodName), os.O_RDWR, inode_id)
def assertData(self, data, offset = 0):
self.assertEqual(self.cache.read(len(data), offset), data)
def test_multi_update_read(self):
data = bytes([1, 2, 3, 4, 5])
self.cache.update(data, 0)
self.cache.update(data, len(data))
try:
self.assertData(data, 0)
self.assertData(data, len(data))
except:
print("\nData: %s\nlen: %d" % (data, len(data)))
print("olb: ", self.cache.__overlapping_block__(len(data)))
self.cache.report()
raise
def test_simple_miss(self):
self.assertRaises(CacheMiss,
self.cache.read, 1, 0)
def test_not_enough_data_mss(self):
data = bytes(list(range(10)))
self.cache.update(data, 0)
self.assertRaises(CacheMiss,
self.cache.read, 2*len(data), 0)
def test_inner_read(self):
data = bytes(list(range(10)))
self.cache.update(data, 0)
self.assertData(data[1:], 1)
def test_add_block_1(self):
data1 = b'1234567890'
data2 = b'1234567890'
result= b'123456789067890'
self.cache.update(data1, 10)
self.cache.update(data2, 5)
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[5] == 15)
self.assertTrue(self.cache.read(15, 5) == result)
def test_add_block_2(self):
data1 = b'1234567890'
data2 = b'12345678901234567890'
result= b'12345678901234567890'
self.cache.update(data1, 10)
self.cache.update(data2, 5)
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[5] == len(result))
self.assertTrue(self.cache.read(len(result), 5) == result)
def test_add_block_3(self):
data1 = b'1234567890'
data2 = b'12345'
result= b'123451234567890'
self.cache.update(data1, 10)
self.cache.update(data2, 5)
try:
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[5] == len(result))
self.assertTrue(self.cache.read(len(result), 5) == result)
except:
self.cache.report()
raise
def test_add_block_4(self):
data1 = b'1234567890'
data2 = b'12345'
results= ((b'12345', 5),(b'1234567890', 11))
self.cache.update(data1, 11)
self.cache.update(data2, 5)
try:
self.assertTrue(len(self.cache.known_offsets()) == 2)
for result, offset in results:
self.assertTrue(self.cache.known_offsets()[offset] == len(result))
self.assertTrue(self.cache.read(len(result), offset) == result)
except:
self.cache.report()
raise
def test_add_block_6(self):
data1 = b'1234567890'
data2 = b'54321'
result= b'5432167890'
self.cache.update(data1, 0)
self.cache.update(data2, 0)
try:
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[0] == len(result))
self.assertTrue(self.cache.read(len(result), 0) == result)
except:
self.cache.report()
raise
def test_add_block_7(self):
data1 = b'1234567890'
data2 = b'54321'
result= b'1235432190'
self.cache.update(data1, 0)
self.cache.update(data2, 3)
try:
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[0] == len(result))
self.assertTrue(self.cache.read(len(result), 0) == result)
except:
self.cache.report()
raise
def test_add_block_8(self):
data1 = b'1234567890'
data2 = b'54321'
result= b'1234554321'
self.cache.update(data1, 0)
self.cache.update(data2, 5)
try:
self.assertTrue(len(self.cache.known_offsets()) == 1)
self.assertTrue(self.cache.known_offsets()[0] == len(result))
self.assertTrue(self.cache.read(len(result), 0) == result)
except:
self.cache.report()
raise
def test_add_block_9(self):
data1 = b'1234567890'
data2 = b'54321'
data3 = b'54321'
results= ((b'123456789054321', 0),(b'54321', 17))
self.cache.update(data1, 0)
self.cache.update(data2, 17)
self.cache.update(data3, 10)
try:
self.assertTrue(len(self.cache.known_offsets()) == 2)
for result, offset in results:
self.assertTrue(self.cache.known_offsets()[offset] == len(result))
self.assertTrue(self.cache.read(len(result), offset) == result)
except:
self.cache.report()
raise
def cmp_bufs(self, buf1, buf2):
if len(buf1) != len(buf2):
return False
for i in range(len(buf1)):
if buf1[i] != buf2[i]:
return False
return True
def verify_add_blocks(self, inputs, results, truncate = None):
for space, bytes in inputs:
self.cache.update(bytes, len(space))
if truncate:
self.cache.truncate(truncate)
try:
self.assertTrue(len(self.cache.known_offsets()) == len(results))
for space, result in list(results.items()):
try:
offset = len(space)
self.assertTrue(self.cache.known_offsets()[offset] == len(result))
self.assertTrue(self.cmp_bufs(self.cache.read(len(result),
offset),
result))
except:
print("\n\nresult: %s, offset: %d, len: %d" % (result,
offset,
len(result)))
print("buffer: %s\n" % self.cache.read(len(result), offset))
print(self.cmp_bufs(self.cache.read(len(result), offset),
result))
raise
except:
self.cache.report()
raise
def test_add_block_10(self):
inputs = (('', b'1234567890'),
(' ', b'54321'),
(' ', b'54321'))
results= {'': b'123456789054321',
' ': b'54321'}
self.verify_add_blocks(inputs, results)
def test_add_block_11(self):
inputs = (('', b'54321'),
(' ', b'54321'),
(' ', b'1234567890'))
results= {'': b'54321123456789054321'}
self.verify_add_blocks(inputs, results)
def test_add_block_12(self):
inputs = (('', b'54321'),
(' ', b'54321'),
(' ', b'1234567890'))
results= {'': b'543212345678904321'}
self.verify_add_blocks(inputs, results)
def test_add_block_13(self):
inputs = (('', b'54321'),
(' ', b'54321'),
(' ', b'12345678901234567890'))
results= {'': b'543212345678901234567890'}
self.verify_add_blocks(inputs, results)
def test_add_truncate_1(self):
inputs = (('', b'54321'),
(' ', b'54321'),
(' ', b'12345678901234567890'))
truncate = len(' ')
results = {'': b'543212345678'}
self.verify_add_blocks(inputs, results, truncate)
def test_add_truncate_2(self):
inputs = (('', b'54321'),
(' ', b'54321'))
truncate = len(' ')
results = {'': b'54321'}
def test_add_truncate_3(self):
inputs = (('', b'54321'),
(' ', b'54321'))
truncate = len(' ')
results = {'': b'54321',
' ': b'5'}
def test_add_truncate_4(self):
inputs = (('', b'54321'),
(' ', b'54321'))
truncate = len(' ')
results = {'': b'54321',
' ': b'54321'}
self.verify_add_blocks(inputs, results, truncate)
def test_perf(self):
inputs = (('', b'54321'),
(' ', b'54321'),
(' ', b'1234567890'))
results= {'': b'543212345678904321'}
self.verify_add_blocks(inputs, results)
for i in range(1000):
self.cache.read(0, 10)
if __name__ == '__main__':
# import cProfile
# cProfile.run('unittest.main()')
unittest.main()