250 lines
8.0 KiB
Python
250 lines
8.0 KiB
Python
"""
|
|
TestCases for python DB Btree key comparison function.
|
|
"""
|
|
|
|
import sys, os, re
|
|
import test_all
|
|
from cStringIO import StringIO
|
|
|
|
import unittest
|
|
try:
|
|
# For Pythons w/distutils pybsddb
|
|
from bsddb3 import db, dbshelve
|
|
except ImportError:
|
|
# For Python 2.3
|
|
from bsddb import db, dbshelve
|
|
|
|
lexical_cmp = cmp
|
|
|
|
def lowercase_cmp(left, right):
|
|
return cmp (left.lower(), right.lower())
|
|
|
|
def make_reverse_comparator (cmp):
|
|
def reverse (left, right, delegate=cmp):
|
|
return - delegate (left, right)
|
|
return reverse
|
|
|
|
_expected_lexical_test_data = ['', 'CCCP', 'a', 'aaa', 'b', 'c', 'cccce', 'ccccf']
|
|
_expected_lowercase_test_data = ['', 'a', 'aaa', 'b', 'c', 'CC', 'cccce', 'ccccf', 'CCCP']
|
|
|
|
class ComparatorTests (unittest.TestCase):
|
|
def comparator_test_helper (self, comparator, expected_data):
|
|
data = expected_data[:]
|
|
data.sort (comparator)
|
|
self.failUnless (data == expected_data,
|
|
"comparator `%s' is not right: %s vs. %s"
|
|
% (comparator, expected_data, data))
|
|
def test_lexical_comparator (self):
|
|
self.comparator_test_helper (lexical_cmp, _expected_lexical_test_data)
|
|
def test_reverse_lexical_comparator (self):
|
|
rev = _expected_lexical_test_data[:]
|
|
rev.reverse ()
|
|
self.comparator_test_helper (make_reverse_comparator (lexical_cmp),
|
|
rev)
|
|
def test_lowercase_comparator (self):
|
|
self.comparator_test_helper (lowercase_cmp,
|
|
_expected_lowercase_test_data)
|
|
|
|
class AbstractBtreeKeyCompareTestCase (unittest.TestCase):
|
|
env = None
|
|
db = None
|
|
|
|
def setUp (self):
|
|
self.filename = self.__class__.__name__ + '.db'
|
|
homeDir = os.path.join (os.path.dirname (sys.argv[0]), 'db_home')
|
|
self.homeDir = homeDir
|
|
try:
|
|
os.mkdir (homeDir)
|
|
except os.error:
|
|
pass
|
|
|
|
env = db.DBEnv ()
|
|
env.open (homeDir,
|
|
db.DB_CREATE | db.DB_INIT_MPOOL
|
|
| db.DB_INIT_LOCK | db.DB_THREAD)
|
|
self.env = env
|
|
|
|
def tearDown (self):
|
|
self.closeDB ()
|
|
if self.env is not None:
|
|
self.env.close ()
|
|
self.env = None
|
|
import glob
|
|
map (os.remove, glob.glob (os.path.join (self.homeDir, '*')))
|
|
|
|
def addDataToDB (self, data):
|
|
i = 0
|
|
for item in data:
|
|
self.db.put (item, str (i))
|
|
i = i + 1
|
|
|
|
def createDB (self, key_comparator):
|
|
self.db = db.DB (self.env)
|
|
self.setupDB (key_comparator)
|
|
self.db.open (self.filename, "test", db.DB_BTREE, db.DB_CREATE)
|
|
|
|
def setupDB (self, key_comparator):
|
|
self.db.set_bt_compare (key_comparator)
|
|
|
|
def closeDB (self):
|
|
if self.db is not None:
|
|
self.db.close ()
|
|
self.db = None
|
|
|
|
def startTest (self):
|
|
pass
|
|
|
|
def finishTest (self, expected = None):
|
|
if expected is not None:
|
|
self.check_results (expected)
|
|
self.closeDB ()
|
|
|
|
def check_results (self, expected):
|
|
curs = self.db.cursor ()
|
|
try:
|
|
index = 0
|
|
rec = curs.first ()
|
|
while rec:
|
|
key, ignore = rec
|
|
self.failUnless (index < len (expected),
|
|
"to many values returned from cursor")
|
|
self.failUnless (expected[index] == key,
|
|
"expected value `%s' at %d but got `%s'"
|
|
% (expected[index], index, key))
|
|
index = index + 1
|
|
rec = curs.next ()
|
|
self.failUnless (index == len (expected),
|
|
"not enough values returned from cursor")
|
|
finally:
|
|
curs.close ()
|
|
|
|
class BtreeKeyCompareTestCase (AbstractBtreeKeyCompareTestCase):
|
|
def runCompareTest (self, comparator, data):
|
|
self.startTest ()
|
|
self.createDB (comparator)
|
|
self.addDataToDB (data)
|
|
self.finishTest (data)
|
|
|
|
def test_lexical_ordering (self):
|
|
self.runCompareTest (lexical_cmp, _expected_lexical_test_data)
|
|
|
|
def test_reverse_lexical_ordering (self):
|
|
expected_rev_data = _expected_lexical_test_data[:]
|
|
expected_rev_data.reverse ()
|
|
self.runCompareTest (make_reverse_comparator (lexical_cmp),
|
|
expected_rev_data)
|
|
|
|
def test_compare_function_useless (self):
|
|
self.startTest ()
|
|
def socialist_comparator (l, r):
|
|
return 0
|
|
self.createDB (socialist_comparator)
|
|
self.addDataToDB (['b', 'a', 'd'])
|
|
# all things being equal the first key will be the only key
|
|
# in the database... (with the last key's value fwiw)
|
|
self.finishTest (['b'])
|
|
|
|
|
|
class BtreeExceptionsTestCase (AbstractBtreeKeyCompareTestCase):
|
|
def test_raises_non_callable (self):
|
|
self.startTest ()
|
|
self.assertRaises (TypeError, self.createDB, 'abc')
|
|
self.assertRaises (TypeError, self.createDB, None)
|
|
self.finishTest ()
|
|
|
|
def test_set_bt_compare_with_function (self):
|
|
self.startTest ()
|
|
self.createDB (lexical_cmp)
|
|
self.finishTest ()
|
|
|
|
def check_results (self, results):
|
|
pass
|
|
|
|
def test_compare_function_incorrect (self):
|
|
self.startTest ()
|
|
def bad_comparator (l, r):
|
|
return 1
|
|
# verify that set_bt_compare checks that comparator('', '') == 0
|
|
self.assertRaises (TypeError, self.createDB, bad_comparator)
|
|
self.finishTest ()
|
|
|
|
def verifyStderr(self, method, successRe):
|
|
"""
|
|
Call method() while capturing sys.stderr output internally and
|
|
call self.fail() if successRe.search() does not match the stderr
|
|
output. This is used to test for uncatchable exceptions.
|
|
"""
|
|
stdErr = sys.stderr
|
|
sys.stderr = StringIO()
|
|
try:
|
|
method()
|
|
finally:
|
|
temp = sys.stderr
|
|
sys.stderr = stdErr
|
|
errorOut = temp.getvalue()
|
|
if not successRe.search(errorOut):
|
|
self.fail("unexpected stderr output:\n"+errorOut)
|
|
|
|
def _test_compare_function_exception (self):
|
|
self.startTest ()
|
|
def bad_comparator (l, r):
|
|
if l == r:
|
|
# pass the set_bt_compare test
|
|
return 0
|
|
raise RuntimeError, "i'm a naughty comparison function"
|
|
self.createDB (bad_comparator)
|
|
#print "\n*** test should print 2 uncatchable tracebacks ***"
|
|
self.addDataToDB (['a', 'b', 'c']) # this should raise, but...
|
|
self.finishTest ()
|
|
|
|
def test_compare_function_exception(self):
|
|
self.verifyStderr(
|
|
self._test_compare_function_exception,
|
|
re.compile('(^RuntimeError:.* naughty.*){2}', re.M|re.S)
|
|
)
|
|
|
|
def _test_compare_function_bad_return (self):
|
|
self.startTest ()
|
|
def bad_comparator (l, r):
|
|
if l == r:
|
|
# pass the set_bt_compare test
|
|
return 0
|
|
return l
|
|
self.createDB (bad_comparator)
|
|
#print "\n*** test should print 2 errors about returning an int ***"
|
|
self.addDataToDB (['a', 'b', 'c']) # this should raise, but...
|
|
self.finishTest ()
|
|
|
|
def test_compare_function_bad_return(self):
|
|
self.verifyStderr(
|
|
self._test_compare_function_bad_return,
|
|
re.compile('(^TypeError:.* return an int.*){2}', re.M|re.S)
|
|
)
|
|
|
|
|
|
def test_cannot_assign_twice (self):
|
|
|
|
def my_compare (a, b):
|
|
return 0
|
|
|
|
self.startTest ()
|
|
self.createDB (my_compare)
|
|
try:
|
|
self.db.set_bt_compare (my_compare)
|
|
assert False, "this set should fail"
|
|
|
|
except RuntimeError, msg:
|
|
pass
|
|
|
|
def test_suite ():
|
|
res = unittest.TestSuite ()
|
|
|
|
res.addTest (unittest.makeSuite (ComparatorTests))
|
|
if db.version () >= (3, 3, 11):
|
|
res.addTest (unittest.makeSuite (BtreeExceptionsTestCase))
|
|
res.addTest (unittest.makeSuite (BtreeKeyCompareTestCase))
|
|
return res
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main (defaultTest = 'suite')
|