Introduce WouldBlockForever test exception

It is thrown if a blocking read is requested on empty fake_session.
Fixed tests that depended on wrong fake_session behaviour/sideeffected
on it.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac349@3111 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/bind10/bind10.8

@@ -1,7 +1,7 @@
 '\" t
 .\"     Title: bind10
 .\"    Author: [see the "AUTHORS" section]
-.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
+.\" Generator: DocBook XSL Stylesheets v1.76.0 <http://docbook.sf.net/>
 .\"      Date: July 29, 2010
 .\"    Manual: BIND10
 .\"    Source: BIND10
@@ -9,6 +9,15 @@
 .\"
 .TH "BIND10" "8" "July 29, 2010" "BIND10" "BIND10"
 .\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
 .\" * set default formatting
 .\" -----------------------------------------------------------------
 .\" disable hyphenation

src/lib/python/isc/config/tests/ccsession_test.py

@@ -125,6 +125,8 @@ class TestModuleCCSession(unittest.TestCase):
         self.assertTrue("Spec1" in fake_session.subscriptions)
 
         self.assertEqual(len(fake_session.message_queue), 0)
+        fake_session.group_sendmsg(None, 'Spec1')
+        fake_session.group_sendmsg(None, 'Spec1')
         self.assertRaises(ModuleCCSessionError, mccs.start)
         self.assertEqual(len(fake_session.message_queue), 2)
         self.assertEqual({'command': ['module_spec', {'module_name': 'Spec1'}]},
@@ -150,6 +152,8 @@ class TestModuleCCSession(unittest.TestCase):
         fake_session = FakeModuleCCSession()
         mccs = self.create_session("spec2.spec", None, None, fake_session)
         self.assertEqual(len(fake_session.message_queue), 0)
+        fake_session.group_sendmsg(None, 'Spec2')
+        fake_session.group_sendmsg(None, 'Spec2')
         self.assertRaises(ModuleCCSessionError, mccs.start)
         self.assertEqual(len(fake_session.message_queue), 2)
         self.assertEqual({'command': ['module_spec', mccs.specification._module_spec]},
@@ -173,6 +177,8 @@ class TestModuleCCSession(unittest.TestCase):
         mccs = self.create_session("spec2.spec", None, None, fake_session)
         mccs.set_config_handler(self.my_config_handler_ok)
         self.assertEqual(len(fake_session.message_queue), 0)
+        fake_session.group_sendmsg(None, 'Spec2')
+        fake_session.group_sendmsg(None, 'Spec2')
         self.assertRaises(ModuleCCSessionError, mccs.start)
         self.assertEqual(len(fake_session.message_queue), 2)
         self.assertEqual({'command': ['module_spec', mccs.specification._module_spec]},
@@ -196,6 +202,8 @@ class TestModuleCCSession(unittest.TestCase):
         mccs = self.create_session("spec2.spec", None, None, fake_session)
         mccs.set_config_handler(self.my_config_handler_ok)
         self.assertEqual(len(fake_session.message_queue), 0)
+        fake_session.group_sendmsg(None, 'Spec2')
+        fake_session.group_sendmsg(None, 'Spec2')
         self.assertRaises(ModuleCCSessionError, mccs.start)
         self.assertEqual(len(fake_session.message_queue), 2)
         self.assertEqual({'command': ['module_spec', mccs.specification._module_spec]},
@@ -382,6 +390,7 @@ class TestModuleCCSession(unittest.TestCase):
         self.assertRaises(ModuleCCSessionError, mccs.get_remote_config_value, "Spec2", "item1")
 
         self.assertFalse("Spec2" in fake_session.subscriptions)
+        fake_session.group_sendmsg(None, 'Spec2')
         rmodname = mccs.add_remote_config(self.spec_file("spec2.spec"))
         self.assertTrue("Spec2" in fake_session.subscriptions)
         self.assertEqual("Spec2", rmodname)
@@ -395,6 +404,7 @@ class TestModuleCCSession(unittest.TestCase):
         self.assertRaises(ModuleCCSessionError, mccs.get_remote_config_value, "Spec2", "item1")
 
         # test if unsubscription is alse sent when object is deleted
+        fake_session.group_sendmsg({'result' : [0]}, 'Spec2')
         rmodname = mccs.add_remote_config(self.spec_file("spec2.spec"))
         self.assertTrue("Spec2" in fake_session.subscriptions)
         mccs = None
@@ -405,6 +415,7 @@ class TestModuleCCSession(unittest.TestCase):
         fake_session = FakeModuleCCSession()
         mccs = self.create_session("spec1.spec", None, None, fake_session)
         mccs.set_command_handler(self.my_command_handler_ok)
+        fake_session.group_sendmsg(None, 'Spec2')
         rmodname = mccs.add_remote_config(self.spec_file("spec2.spec"))
 
         # remove the 'get config' from the queue

src/lib/python/isc/config/tests/cfgmgr_test.py

@@ -255,6 +255,7 @@ class TestConfigManager(unittest.TestCase):
                          self.fake_session.get_message(self.name, None))
         self.assertEqual(len(self.fake_session.message_queue), 0)
 
+        self.fake_session.group_sendmsg(None, 'ConfigManager')
         self._handle_msg_helper({ "command": [ "set_config", [ ] ] },
                                 {'result': [1, 'Wrong number of arguments']} )
         self._handle_msg_helper({ "command": [ "set_config", [ self.name, { "test": 125 }] ] },

src/lib/python/isc/config/tests/unittest_fakesession.py

@@ -17,6 +17,13 @@
 
 import isc
 
+class WouldBlockForever(Exception):
+    """
+    This is thrown by the FakeModuleCCSession if it would need
+    to block forever for incoming message.
+    """
+    pass
+
 #
 # We can probably use a more general version of this
 #
@@ -64,13 +71,18 @@ class FakeModuleCCSession:
         if 'group' in env:
             self.message_queue.append([ env['group'], None, msg])
 
-    def group_recvmsg(self, blocking, seq = None):
+    def group_recvmsg(self, nonblock=True, seq = None):
         for qm in self.message_queue:
-            if qm[0] in self.subscriptions and (qm[1] == None or qm[1] in self.subscriptions[qm[0]]):
+            if qm[0] in self.subscriptions and (qm[1] == None or qm[1] in
+                self.subscriptions[qm[0]]):
                 self.message_queue.remove(qm)
                 return qm[2], {'group': qm[0], 'from': qm[1]}
         if self._timeout == 0:
-            return None, None
+            if nonblock:
+                return None, None
+            else:
+                raise WouldBlockForever(
+                    "Blocking read without timeout and no message ready")
         else:
             raise isc.cc.SessionTimeout("Timeout set but no data to "
                                  "return to group_recvmsg()")