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"""Tests exceptions and DB-API exception wrapping."""
from sqlalchemy import exc as sa_exceptions
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import eq_
from sqlalchemy.engine import default
class Error(Exception):
pass
class DatabaseError(Error):
pass
class OperationalError(DatabaseError):
pass
class ProgrammingError(DatabaseError):
def __str__(self):
return '<%s>' % self.bogus
class OutOfSpec(DatabaseError):
pass
# exception with a totally different name...
class WrongNameError(DatabaseError):
pass
# but they're going to call it their "IntegrityError"
IntegrityError = WrongNameError
# and they're going to subclass it!
class SpecificIntegrityError(WrongNameError):
pass
class WrapTest(fixtures.TestBase):
def _translating_dialect_fixture(self):
d = default.DefaultDialect()
d.dbapi_exception_translation_map = {
"WrongNameError": "IntegrityError"
}
return d
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:
eq_(
str(exc),
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message']")
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(
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: {")
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(
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: "
"[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),
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: [{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),
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: [{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),
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: [(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),
"(test.base.test_except.OperationalError) "
"[SQL: 'this is a message'] [parameters: [(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)
dialect = self._translating_dialect_fixture()
try:
raise sa_exceptions.DBAPIError.instance(
'', [],
sa_exceptions.ArgumentError(), DatabaseError,
dialect=dialect)
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_dbapi_uses_wrong_names(self):
dialect = self._translating_dialect_fixture()
try:
raise sa_exceptions.DBAPIError.instance(
'', [], IntegrityError(),
DatabaseError, dialect=dialect)
except sa_exceptions.DBAPIError as e:
self.assert_(e.__class__ is sa_exceptions.IntegrityError)
try:
raise sa_exceptions.DBAPIError.instance(
'', [], SpecificIntegrityError(),
DatabaseError, dialect=dialect)
except sa_exceptions.DBAPIError as e:
self.assert_(e.__class__ is sa_exceptions.IntegrityError)
try:
raise sa_exceptions.DBAPIError.instance(
'', [], SpecificIntegrityError(),
DatabaseError)
except sa_exceptions.DBAPIError as e:
# doesn't work without a dialect
self.assert_(e.__class__ is not sa_exceptions.IntegrityError)
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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