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Kirill Smelkov
ZODB
Commits
d6750225
Commit
d6750225
authored
Feb 11, 2002
by
Jeremy Hylton
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A few trivial tests of the cPickleCache.
parent
a6c36f62
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src/ZODB/tests/testCache.py
src/ZODB/tests/testCache.py
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src/ZODB/tests/testCache.py
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d6750225
"""A few simple tests of the public cache API.
Each DB Connection has a separate PickleCache. The Cache serves two
purposes. It acts like a memo for unpickling. It also keeps recent
objects in memory under the assumption that they may be used again.
"""
import
random
import
time
import
types
import
unittest
import
ZODB
import
ZODB.MappingStorage
from
ZODB.PersistentMapping
import
PersistentMapping
from
ZODB.tests.MinPO
import
MinPO
from
ZODB.utils
import
p64
class
CacheTestBase
(
unittest
.
TestCase
):
def
setUp
(
self
):
store
=
ZODB
.
MappingStorage
.
MappingStorage
()
self
.
db
=
ZODB
.
DB
(
store
,
cache_size
=
self
.
CACHE_SIZE
,
cache_deactivate_after
=
self
.
CACHE_DEACTIVATE_AFTER
)
self
.
conns
=
[]
def
tearDown
(
self
):
for
conn
in
self
.
conns
:
conn
.
close
()
self
.
db
.
close
()
NUM_COLLECTIONS
=
10
MAX_OBJECTS
=
100
CACHE_SIZE
=
20
CACHE_DEACTIVATE_AFTER
=
5
def
noodle_new_connection
(
self
):
"""Do some reads and writes on a new connection."""
c
=
self
.
db
.
open
()
self
.
noodle_connection
(
c
)
def
noodle_connection
(
self
,
c
):
r
=
c
.
root
()
i
=
random
.
randrange
(
0
,
self
.
NUM_COLLECTIONS
)
d
=
r
.
get
(
i
)
if
d
is
None
:
d
=
r
[
i
]
=
PersistentMapping
()
get_transaction
().
commit
()
for
i
in
range
(
random
.
randrange
(
10
,
20
)):
j
=
random
.
randrange
(
0
,
self
.
MAX_OBJECTS
)
o
=
d
.
get
(
j
)
if
o
is
None
:
o
=
d
[
j
]
=
MinPO
(
j
)
o
.
value
+=
1
get_transaction
().
commit
()
class
DBMethods
(
CacheTestBase
):
__super_setUp
=
CacheTestBase
.
setUp
def
setUp
(
self
):
self
.
__super_setUp
()
for
i
in
range
(
4
):
self
.
noodle_new_connection
()
def
checkCacheDetail
(
self
):
for
name
,
count
in
self
.
db
.
cacheDetail
():
self
.
assert_
(
isinstance
(
name
,
types
.
StringType
))
self
.
assert_
(
isinstance
(
count
,
types
.
IntType
))
def
checkCacheExtremeDetail
(
self
):
expected
=
[
'conn_no'
,
'id'
,
'oid'
,
'rc'
,
'klass'
,
'state'
]
for
dict
in
self
.
db
.
cacheExtremeDetail
():
for
k
,
v
in
dict
.
items
():
self
.
assert_
(
k
in
expected
)
# XXX not really sure how to do a black box test of the cache.
# should the full sweep and minimize calls always remove things?
# The sleep(3) call is based on the implementation of the cache.
# It's measures time in units of three seconds, so something used
# within the last three seconds looks like something that is
# currently being used. Three seconds old is the youngest
# something can be and still be collected.
def
checkFullSweep
(
self
):
old_size
=
self
.
db
.
cacheSize
()
time
.
sleep
(
3
)
self
.
db
.
cacheFullSweep
(
0
)
new_size
=
self
.
db
.
cacheSize
()
self
.
assert_
(
new_size
<
old_size
,
"%s < %s"
%
(
old_size
,
new_size
))
def
checkMinimize
(
self
):
old_size
=
self
.
db
.
cacheSize
()
time
.
sleep
(
3
)
self
.
db
.
cacheMinimize
(
0
)
new_size
=
self
.
db
.
cacheSize
()
self
.
assert_
(
new_size
<
old_size
,
"%s < %s"
%
(
old_size
,
new_size
))
# XXX don't have an explicit test for incrgc, because the
# connection and database call it internally
# XXX same for the get and invalidate methods
def
test_suite
():
return
unittest
.
makeSuite
(
DBMethods
,
'check'
)
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