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""" Python DB API 2.0 driver Two Phase Commit compliance test suite.
"""
import unittest
class TwoPhaseCommitTests(unittest.TestCase):
driver = None
def connect(self):
"""Make a database connection."""
raise NotImplementedError
_last_id = 0
_global_id_prefix = "dbapi20_tpc:"
def make_xid(self, con):
id = TwoPhaseCommitTests._last_id
TwoPhaseCommitTests._last_id += 1
return con.xid(42, "%s%d" % (self._global_id_prefix, id), "qualifier")
def test_xid(self):
con = self.connect()
try:
xid = con.xid(42, "global", "bqual")
except self.driver.NotSupportedError:
self.fail("Driver does not support transaction IDs.")
self.assertEquals(xid[0], 42)
self.assertEquals(xid[1], "global")
self.assertEquals(xid[2], "bqual")
# Try some extremes for the transaction ID:
xid = con.xid(0, "", "")
self.assertEquals(tuple(xid), (0, "", ""))
xid = con.xid(0x7fffffff, "a" * 64, "b" * 64)
self.assertEquals(tuple(xid), (0x7fffffff, "a" * 64, "b" * 64))
def test_tpc_begin(self):
con = self.connect()
try:
xid = self.make_xid(con)
try:
con.tpc_begin(xid)
except self.driver.NotSupportedError:
self.fail("Driver does not support tpc_begin()")
finally:
con.close()
def test_tpc_commit_without_prepare(self):
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
cursor = con.cursor()
cursor.execute("SELECT 1")
con.tpc_commit()
finally:
con.close()
def test_tpc_rollback_without_prepare(self):
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
cursor = con.cursor()
cursor.execute("SELECT 1")
con.tpc_rollback()
finally:
con.close()
def test_tpc_commit_with_prepare(self):
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
cursor = con.cursor()
cursor.execute("SELECT 1")
con.tpc_prepare()
con.tpc_commit()
finally:
con.close()
def test_tpc_rollback_with_prepare(self):
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
cursor = con.cursor()
cursor.execute("SELECT 1")
con.tpc_prepare()
con.tpc_rollback()
finally:
con.close()
def test_tpc_begin_in_transaction_fails(self):
con = self.connect()
try:
xid = self.make_xid(con)
cursor = con.cursor()
cursor.execute("SELECT 1")
self.assertRaises(self.driver.ProgrammingError,
con.tpc_begin, xid)
finally:
con.close()
def test_tpc_begin_in_tpc_transaction_fails(self):
con = self.connect()
try:
xid = self.make_xid(con)
cursor = con.cursor()
cursor.execute("SELECT 1")
self.assertRaises(self.driver.ProgrammingError,
con.tpc_begin, xid)
finally:
con.close()
def test_commit_in_tpc_fails(self):
# calling commit() within a TPC transaction fails with
# ProgrammingError.
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
self.assertRaises(self.driver.ProgrammingError, con.commit)
finally:
con.close()
def test_rollback_in_tpc_fails(self):
# calling rollback() within a TPC transaction fails with
# ProgrammingError.
con = self.connect()
try:
xid = self.make_xid(con)
con.tpc_begin(xid)
self.assertRaises(self.driver.ProgrammingError, con.rollback)
finally:
con.close()