[2518] Organize isc::Exception-s in a hierarchy

src/lib/dns/python/pydnspp.cc

@@ -244,7 +244,8 @@ initModulePart_Name(PyObject* mod) {
     // Add the exceptions to the module
     try {
         po_NameParserException =
-            PyErr_NewException("pydnspp.NameParserException", NULL, NULL);
+            PyErr_NewException("pydnspp.NameParserException",
+                               po_IscException, NULL);
         PyObjectContainer(po_NameParserException)
             .installToModule(mod, "NameParserException");
 
@@ -875,14 +876,14 @@ PyInit_pydnspp(void) {
         PyObjectContainer(po_IscException).installToModule(mod, "IscException");
 
         po_InvalidOperation = PyErr_NewException("pydnspp.InvalidOperation",
-                                                 NULL, NULL);
-        PyObjectContainer(po_InvalidOperation).installToModule(
-            mod, "InvalidOperation");
+                                                 po_IscException, NULL);
+        PyObjectContainer(po_InvalidOperation)
+	    .installToModule(mod, "InvalidOperation");
 
         po_InvalidParameter = PyErr_NewException("pydnspp.InvalidParameter",
-                                                 NULL, NULL);
-        PyObjectContainer(po_InvalidParameter).installToModule(
-            mod, "InvalidParameter");
+                                                 po_IscException, NULL);
+        PyObjectContainer(po_InvalidParameter)
+	    .installToModule(mod, "InvalidParameter");
     } catch (const std::exception& ex) {
         const std::string ex_what =
             "Unexpected failure in pydnspp initialization: " +

src/lib/dns/python/tests/Makefile.am

@@ -6,6 +6,7 @@ PYTESTS += name_python_test.py
 PYTESTS += nsec3hash_python_test.py
 PYTESTS += question_python_test.py
 PYTESTS += opcode_python_test.py
+PYTESTS += pydnspp_python_test.py
 PYTESTS += rcode_python_test.py
 PYTESTS += rdata_python_test.py
 PYTESTS += rrclass_python_test.py

src/lib/dns/python/tests/pydnspp_python_test.py

@@ -0,0 +1,30 @@
+# Copyright (C) 2014  Internet Systems Consortium.
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SYSTEMS CONSORTIUM
+# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# INTERNET SYSTEMS CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+# FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+#
+# Tests for the common part of the pydnspp module
+#
+
+import unittest
+import os
+from pydnspp import *
+
+class CommonTest(unittest.TestCase):
+    def test_exception_hierarchy(self):
+        self.assertTrue(isinstance(InvalidOperation(), IscException))
+        self.assertTrue(isinstance(InvalidParameter(), IscException))
+
+if __name__ == '__main__':
+    unittest.main()