Fixes task_log_get and task_log_get_all signatures

Fixes signatures for the above methods in nova/db/api.py
based on the recent TaskLog refactor on sqlalchemy/api.py.
Also adds unit tests for TaskLog.

Fixes Bug 1102652.

Change-Id: Id7ce74b8941d9eb6a50dfbfaa62e0fe05dd467c2

nova/db/api.py

@@ -1705,16 +1705,14 @@ def task_log_end_task(context, task_name,
                         period_ending,
                         host,
                         errors,
-                        message=None,
-                        session=None):
+                        message=None):
     """Mark a task as complete for a given host/time period."""
     return IMPL.task_log_end_task(context, task_name,
                                   period_beginning,
                                   period_ending,
                                   host,
                                   errors,
-                                  message,
-                                  session)
+                                  message)
 
 
 def task_log_begin_task(context, task_name,
@@ -1722,25 +1720,23 @@ def task_log_begin_task(context, task_name,
                         period_ending,
                         host,
                         task_items=None,
-                        message=None,
-                        session=None):
+                        message=None):
     """Mark a task as started for a given host/time period."""
     return IMPL.task_log_begin_task(context, task_name,
                                     period_beginning,
                                     period_ending,
                                     host,
                                     task_items,
-                                    message,
-                                    session)
+                                    message)
 
 
 def task_log_get_all(context, task_name, period_beginning,
-                 period_ending, host=None, state=None, session=None):
+                 period_ending, host=None, state=None):
     return IMPL.task_log_get_all(context, task_name, period_beginning,
-                 period_ending, host, state, session)
+                 period_ending, host, state)
 
 
 def task_log_get(context, task_name, period_beginning,
-                 period_ending, host, state=None, session=None):
+                 period_ending, host, state=None):
     return IMPL.task_log_get(context, task_name, period_beginning,
-                 period_ending, host, state, session)
+                 period_ending, host, state)

nova/db/sqlalchemy/api.py

@@ -4770,15 +4770,15 @@ def _task_log_get_query(context, task_name, period_beginning,
 @require_admin_context
 def task_log_get(context, task_name, period_beginning, period_ending, host,
                  state=None):
-    return _task_log_get_query(task_name, period_beginning, period_ending,
-                               host, state).first()
+    return _task_log_get_query(context, task_name, period_beginning,
+                               period_ending, host, state).first()
 
 
 @require_admin_context
 def task_log_get_all(context, task_name, period_beginning, period_ending,
                      host=None, state=None):
-    return _task_log_get_query(task_name, period_beginning, period_ending,
-                               host, state).all()
+    return _task_log_get_query(context, task_name, period_beginning,
+                               period_ending, host, state).all()
 
 
 @require_admin_context

nova/tests/test_db_api.py

@@ -1671,3 +1671,47 @@ class VolumeUsageDBApiTestCase(test.TestCase):
         for key, value in expected_vol_usages.items():
             self.assertEqual(vol_usages[0][key], value)
         timeutils.clear_time_override()
+
+
+class TaskLogTestCase(test.TestCase):
+
+    def setUp(self):
+        super(TaskLogTestCase, self).setUp()
+        self.context = context.get_admin_context()
+        now = timeutils.utcnow()
+        self.begin = now - datetime.timedelta(seconds=10)
+        self.end = now - datetime.timedelta(seconds=5)
+        self.task_name = 'fake-task-name'
+        self.host = 'fake-host'
+        self.message = 'Fake task message'
+        db.task_log_begin_task(self.context, self.task_name, self.begin,
+                               self.end, self.host, message=self.message)
+
+    def test_task_log_get(self):
+        result = db.task_log_get(self.context, self.task_name, self.begin,
+                                 self.end, self.host)
+        self.assertEqual(result['task_name'], self.task_name)
+        self.assertEqual(result['period_beginning'], self.begin)
+        self.assertEqual(result['period_ending'], self.end)
+        self.assertEqual(result['host'], self.host)
+        self.assertEqual(result['message'], self.message)
+
+    def test_task_log_get_all(self):
+        result = db.task_log_get_all(self.context, self.task_name, self.begin,
+                                     self.end, host=self.host)
+        self.assertEqual(len(result), 1)
+
+    def test_task_log_begin_task(self):
+        db.task_log_begin_task(self.context, 'fake', self.begin,
+                               self.end, self.host, message=self.message)
+        result = db.task_log_get(self.context, 'fake', self.begin,
+                                 self.end, self.host)
+        self.assertEqual(result['task_name'], 'fake')
+
+    def test_task_log_end_task(self):
+        errors = 1
+        db.task_log_end_task(self.context, self.task_name, self.begin,
+                            self.end, self.host, errors, message=self.message)
+        result = db.task_log_get(self.context, self.task_name, self.begin,
+                                 self.end, self.host)
+        self.assertEqual(result['errors'], 1)