1 files changed, 62 insertions, 0 deletions
diff --git a/tests/test_errors.py b/tests/test_errors.py
new file mode 100755
index 0000000..5645e18
--- /dev/null
+++ b/tests/test_errors.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+# test_errors.py - unit test for psycopg2.errors module
+#
+# Copyright (C) 2018 Daniele Varrazzo  <daniele.varrazzo@gmail.com>
+#
+# 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
+
+
+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
+
+        from psycopg2.errors import UndefinedTable
+        self.assert_(isinstance(e, UndefinedTable), type(e))
+        self.assert_(isinstance(e, self.conn.ProgrammingError))
+
+    def test_exception_class_fallback(self):
+        cur = self.conn.cursor()
+
+        from psycopg2 import errors
+        x = errors._by_sqlstate.pop('42P01')
+        try:
+            cur.execute("select * from nonexist")
+        except psycopg2.Error as exc:
+            e = exc
+        finally:
+            errors._by_sqlstate['42P01'] = x
+
+        self.assertEqual(type(e), self.conn.ProgrammingError)
+
+
+def test_suite():
+    return unittest.TestLoader().loadTestsFromName(__name__)
+
+if __name__ == "__main__":
+    unittest.main()