"""
TestCases for exercising a Queue DB.
"""
import os, string
from pprint import pprint
import unittest
from test_all import db, verbose, get_new_database_path
#----------------------------------------------------------------------
class SimpleQueueTestCase(unittest.TestCase):
def setUp(self):
self.filename = get_new_database_path()
def tearDown(self):
try:
os.remove(self.filename)
except os.error:
pass
def test01_basic(self):
# Basic Queue tests using the deprecated DBCursor.consume method.
if verbose:
print '\n', '-=' * 30
print "Running %s.test01_basic..." % self.__class__.__name__
d = db.DB()
d.set_re_len(40) # Queues must be fixed length
d.open(self.filename, db.DB_QUEUE, db.DB_CREATE)
if verbose:
print "before appends" + '-' * 30
pprint(d.stat())
for x in string.letters:
d.append(x * 40)
self.assertEqual(len(d), len(string.letters))
d.put(100, "some more data")
d.put(101, "and some more ")
d.put(75, "out of order")
d.put(1, "replacement data")
self.assertEqual(len(d), len(string.letters)+3)
if verbose:
print "before close" + '-' * 30
pprint(d.stat())
d.close()
del d
d = db.DB()
d.open(self.filename)
if verbose:
print "after open" + '-' * 30
pprint(d.stat())
# Test "txn" as a positional parameter
d.append("one more", None)
# Test "txn" as a keyword parameter
d.append("another one", txn=None)
c = d.cursor()
if verbose:
print "after append" + '-' * 30
pprint(d.stat())
rec = c.consume()
while rec:
if verbose:
print rec
rec = c.consume()
c.close()
if verbose:
print "after consume loop" + '-' * 30
pprint(d.stat())
self.assertEqual(len(d), 0, \
"if you see this message then you need to rebuild " \
"Berkeley DB 3.1.17 with the patch in patches/qam_stat.diff")
d.close()
def test02_basicPost32(self):
# Basic Queue tests using the new DB.consume method in DB 3.2+
# (No cursor needed)
if verbose:
print '\n', '-=' * 30
print "Running %s.test02_basicPost32..." % self.__class__.__name__
d = db.DB()
d.set_re_len(40) # Queues must be fixed length
d.open(self.filename, db.DB_QUEUE, db.DB_CREATE)
if verbose:
print "before appends" + '-' * 30
pprint(d.stat())
for x in string.letters:
d.append(x * 40)
self.assertEqual(len(d), len(string.letters))
d.put(100, "some more data")
d.put(101, "and some more ")
d.put(75, "out of order")
d.put(1, "replacement data")
self.assertEqual(len(d), len(string.letters)+3)
if verbose:
print "before close" + '-' * 30
pprint(d.stat())
d.close()
del d
d = db.DB()
d.open(self.filename)
#d.set_get_returns_none(true)
if verbose:
print "after open" + '-' * 30
pprint(d.stat())
d.append("one more")
if verbose:
print "after append" + '-' * 30
pprint(d.stat())
rec = d.consume()
while rec:
if verbose:
print rec
rec = d.consume()
if verbose:
print "after consume loop" + '-' * 30
pprint(d.stat())
d.close()
#----------------------------------------------------------------------
def test_suite():
return unittest.makeSuite(SimpleQueueTestCase)
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')