95 lines
3.1 KiB
Python
Executable File
95 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python
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# test_errors.py - unit test for psycopg2.errors module
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#
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# Copyright (C) 2018-2019 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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# Copyright (C) 2020-2021 The Psycopg Team
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# In addition, as a special exception, the copyright holders give
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# permission to link this program with the OpenSSL library (or with
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# modified versions of OpenSSL that use the same license as OpenSSL),
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# and distribute linked combinations including the two.
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#
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# You must obey the GNU Lesser General Public License in all respects for
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# all of the code used other than OpenSSL.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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import unittest
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from .testutils import ConnectingTestCase
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import psycopg2
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from psycopg2 import errors
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from psycopg2._psycopg import sqlstate_errors
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from psycopg2.errors import UndefinedTable
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class ErrorsTests(ConnectingTestCase):
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def test_exception_class(self):
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cur = self.conn.cursor()
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try:
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cur.execute("select * from nonexist")
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except psycopg2.Error as exc:
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e = exc
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self.assert_(isinstance(e, UndefinedTable), type(e))
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self.assert_(isinstance(e, self.conn.ProgrammingError))
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def test_exception_class_fallback(self):
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cur = self.conn.cursor()
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x = sqlstate_errors.pop('42P01')
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try:
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cur.execute("select * from nonexist")
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except psycopg2.Error as exc:
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e = exc
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finally:
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sqlstate_errors['42P01'] = x
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self.assertEqual(type(e), self.conn.ProgrammingError)
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def test_lookup(self):
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self.assertIs(errors.lookup('42P01'), errors.UndefinedTable)
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with self.assertRaises(KeyError):
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errors.lookup('XXXXX')
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def test_connection_exceptions_backwards_compatibility(self):
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err = errors.lookup('08000')
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# connection exceptions are classified as operational errors
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self.assert_(issubclass(err, errors.OperationalError))
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# previously these errors were classified only as DatabaseError
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self.assert_(issubclass(err, errors.DatabaseError))
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def test_has_base_exceptions(self):
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excs = []
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for n in dir(psycopg2):
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obj = getattr(psycopg2, n)
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if isinstance(obj, type) and issubclass(obj, Exception):
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excs.append(obj)
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self.assert_(len(excs) > 8, str(excs))
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excs.append(psycopg2.extensions.QueryCanceledError)
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excs.append(psycopg2.extensions.TransactionRollbackError)
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for exc in excs:
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self.assert_(hasattr(errors, exc.__name__))
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self.assert_(getattr(errors, exc.__name__) is exc)
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def test_suite():
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return unittest.TestLoader().loadTestsFromName(__name__)
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if __name__ == "__main__":
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unittest.main()
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