sqlalchemy/test/base/test_except.py

"""Tests exceptions and DB-API exception wrapping."""
from sqlalchemy import exc as sa_exceptions
from sqlalchemy.test import TestBase

# Py3K
#StandardError = BaseException
# Py2K
from exceptions import StandardError, KeyboardInterrupt, SystemExit
# end Py2K

class Error(StandardError):
    """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(TestBase):
    def test_db_error_normal(self):
        try:
            raise sa_exceptions.DBAPIError.instance(
                '', [], OperationalError())
        except sa_exceptions.DBAPIError:
            self.assert_(True)
    
    def test_tostring(self):
        try:
            raise sa_exceptions.DBAPIError.instance(
                'this is a message', None, OperationalError())
        except sa_exceptions.DBAPIError, 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())
        except sa_exceptions.DBAPIError, 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())
        except sa_exceptions.DBAPIError, 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())
        except sa_exceptions.DBAPIError, exc:
            assert 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}]", str(exc)

        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())
        except sa_exceptions.DBAPIError, exc:
            assert str(exc) == "(OperationalError)  'this is a message' [{1: 1}, {1: 1}] ... and a total of 11 bound parameter sets"

        try:
            raise sa_exceptions.DBAPIError.instance(
                'this is a message', [(1,), (1,), (1,), (1,), (1,), (1,), (1,), (1,), (1,), (1,)], OperationalError())
        except sa_exceptions.DBAPIError, exc:
            assert 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())
        except sa_exceptions.DBAPIError, exc:
            assert str(exc) == "(OperationalError)  'this is a message' [(1,), (1,)] ... and a total of 11 bound parameter sets"
        
    def test_db_error_busted_dbapi(self):
        try:
            raise sa_exceptions.DBAPIError.instance(
                '', [], ProgrammingError())
        except sa_exceptions.DBAPIError, 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())
        except sa_exceptions.DBAPIError, e:
            self.assert_(e.__class__ is sa_exceptions.DBAPIError)
        except OutOfSpec:
            self.assert_(False)

        # Make sure the DatabaseError recognition logic is limited to
        # subclasses of sqlalchemy.exceptions.DBAPIError
        try:
            raise sa_exceptions.DBAPIError.instance(
                '', [], sa_exceptions.ArgumentError())
        except sa_exceptions.DBAPIError, 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())
        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())
        except sa_exceptions.DBAPIError:
            self.assert_(False)
        except SystemExit:
            self.assert_(True)