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