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"""Tests exceptions and DB-API exception wrapping."""
from sqlalchemy import exc as sa_exceptions
from sqlalchemy import util
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import eq_
if util.py2k:
from exceptions import StandardError, KeyboardInterrupt, SystemExit
else:
Exception = BaseException
class Error(Exception):
"""This class will be old-style on <= 2.4 and new-style on >=
2.5."""
class DatabaseError(Error):
pass
class OperationalError(DatabaseError):
pass
class ProgrammingError(DatabaseError):
def __str__(self):
return '<%s>' % self.bogus
class OutOfSpec(DatabaseError):
pass
class WrapTest(fixtures.TestBase):
def test_db_error_normal(self):
try:
raise sa_exceptions.DBAPIError.instance('', [],
OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError:
self.assert_(True)
def test_tostring(self):
try:
raise sa_exceptions.DBAPIError.instance('this is a message'
, None, OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
assert str(exc) \
== "(OperationalError) 'this is a message' None"
def test_tostring_large_dict(self):
try:
raise sa_exceptions.DBAPIError.instance('this is a message'
,
{'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5, 'f': 6, 'g': 7, 'h':
8, 'i': 9, 'j': 10, 'k': 11,
}, OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
assert str(exc).startswith("(OperationalError) 'this is a "
"message' {")
def test_tostring_large_list(self):
try:
raise sa_exceptions.DBAPIError.instance('this is a message',
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,],
OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
assert str(exc).startswith("(OperationalError) 'this is a "
"message' [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]")
def test_tostring_large_executemany(self):
try:
raise sa_exceptions.DBAPIError.instance('this is a message',
[{1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1},
{1: 1}, {1:1}, {1: 1}, {1: 1},],
OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
eq_(str(exc) ,
"(OperationalError) 'this is a message' [{1: 1}, "\
"{1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: "\
"1}, {1: 1}, {1: 1}]")
try:
raise sa_exceptions.DBAPIError.instance('this is a message', [
{1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1},
{1:1}, {1: 1}, {1: 1}, {1: 1},
], OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
eq_(str(exc) ,
"(OperationalError) 'this is a message' [{1: 1}, "
"{1: 1}, {1: 1}, {1: 1}, {1: 1}, {1: 1}, "
"{1: 1}, {1: 1} ... displaying 10 of 11 total "
"bound parameter sets ... {1: 1}, {1: 1}]"
)
try:
raise sa_exceptions.DBAPIError.instance('this is a message',
[
(1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ),
(1, ),
], OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
eq_(str(exc),
"(OperationalError) 'this is a message' [(1,), "\
"(1,), (1,), (1,), (1,), (1,), (1,), (1,), (1,), (1,)]")
try:
raise sa_exceptions.DBAPIError.instance('this is a message', [
(1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ), (1, ),
(1, ), (1, ),
], OperationalError(), DatabaseError)
except sa_exceptions.DBAPIError as exc:
eq_(str(exc),
"(OperationalError) 'this is a message' [(1,), "
"(1,), (1,), (1,), (1,), (1,), (1,), (1,) "
"... displaying 10 of 11 total bound "
"parameter sets ... (1,), (1,)]"
)
def test_db_error_busted_dbapi(self):
try:
raise sa_exceptions.DBAPIError.instance('', [],
ProgrammingError(), DatabaseError)
except sa_exceptions.DBAPIError as e:
self.assert_(True)
self.assert_('Error in str() of DB-API' in e.args[0])
def test_db_error_noncompliant_dbapi(self):
try:
raise sa_exceptions.DBAPIError.instance(
'', [], OutOfSpec(),
DatabaseError)
except sa_exceptions.DBAPIError as e:
# OutOfSpec subclasses DatabaseError
self.assert_(e.__class__ is sa_exceptions.DatabaseError)
except OutOfSpec:
self.assert_(False)
try:
raise sa_exceptions.DBAPIError.instance(
'', [],
sa_exceptions.ArgumentError(), DatabaseError)
except sa_exceptions.DBAPIError as e:
self.assert_(e.__class__ is sa_exceptions.DBAPIError)
except sa_exceptions.ArgumentError:
self.assert_(False)
def test_db_error_keyboard_interrupt(self):
try:
raise sa_exceptions.DBAPIError.instance('', [],
KeyboardInterrupt(), DatabaseError)
except sa_exceptions.DBAPIError:
self.assert_(False)
except KeyboardInterrupt:
self.assert_(True)
def test_db_error_system_exit(self):
try:
raise sa_exceptions.DBAPIError.instance('', [],
SystemExit(), DatabaseError)
except sa_exceptions.DBAPIError:
self.assert_(False)
except SystemExit:
self.assert_(True)
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