Convergence soft delete stack after delete action is completed

In an convergence enabled environment, when an stack-delete
action is completed, the stack was not soft deleted from DB.

This patch soft deletes the stack after all the required
stack-delete operations are completed.

Change-Id: I36d2b76223d3fc5f313b953b3976282d0923e92e

heat/engine/stack.py

@@ -1615,7 +1615,7 @@ class Stack(collections.Mapping):
                  self.name, self.id, traversal_id)
 
         prev_prev_id = self.prev_raw_template_id
-        self.prev_raw_template_id = self.t.id
+        self.prev_raw_template_id = None
         self.store()
 
         if (prev_prev_id is not None and
@@ -1625,3 +1625,8 @@ class Stack(collections.Mapping):
 
         reason = 'Stack %s completed successfully' % self.action
         self.state_set(self.action, self.COMPLETE, reason)
+        if self.action == self.DELETE:
+            try:
+                stack_object.Stack.delete(self.context, self.id)
+            except exception.NotFound:
+                pass

heat/tests/test_stack.py

@@ -2037,8 +2037,9 @@ class StackTest(common.HeatTestCase):
         self.assertEqual('foo', params.get('param1'))
         self.assertEqual('bar', params.get('param2'))
 
+    @mock.patch.object(stack_object.Stack, 'delete')
     @mock.patch.object(raw_template_object.RawTemplate, 'delete')
-    def test_mark_complete_create(self, mock_delete):
+    def test_mark_complete_create(self, mock_tmpl_delete, mock_stack_delete):
         tmpl = template.Template({
             'HeatTemplateFormatVersion': '2012-12-12',
             'Resources': {
@@ -2048,16 +2049,21 @@ class StackTest(common.HeatTestCase):
 
         tmpl_stack = stack.Stack(self.ctx, 'test', tmpl)
         tmpl_stack.store()
+        tmpl_stack.action = tmpl_stack.CREATE
+        tmpl_stack.status = tmpl_stack.IN_PROGRESS
         tmpl_stack.current_traversal = 'some-traversal'
         tmpl_stack.mark_complete('some-traversal')
         self.assertEqual(tmpl_stack.prev_raw_template_id,
-                         tmpl_stack.t.id)
-        self.assertFalse(mock_delete.called)
+                         None)
+        self.assertFalse(mock_tmpl_delete.called)
+        self.assertFalse(mock_stack_delete.called)
         self.assertEqual(tmpl_stack.status, tmpl_stack.COMPLETE)
 
+    @mock.patch.object(stack_object.Stack, 'delete')
     @mock.patch.object(raw_template_object.RawTemplate, 'delete')
     @mock.patch.object(stack.Stack, 'store')
-    def test_mark_complete_update(self, mock_store, mock_delete):
+    def test_mark_complete_update(self, mock_store, mock_tmpl_delete,
+                                  mock_stack_delete):
         tmpl = template.Template({
             'HeatTemplateFormatVersion': '2012-12-12',
             'Resources': {
@@ -2069,16 +2075,45 @@ class StackTest(common.HeatTestCase):
         tmpl_stack.id = 2
         tmpl_stack.t.id = 2
         tmpl_stack.prev_raw_template_id = 1
+        tmpl_stack.action = tmpl_stack.UPDATE
+        tmpl_stack.status = tmpl_stack.IN_PROGRESS
         tmpl_stack.current_traversal = 'some-traversal'
         tmpl_stack.mark_complete('some-traversal')
         self.assertEqual(tmpl_stack.prev_raw_template_id,
-                         tmpl_stack.t.id)
-        mock_delete.assert_called_once_with(self.ctx, 1)
+                         None)
+        self.assertFalse(mock_stack_delete.called)
+        mock_tmpl_delete.assert_called_once_with(self.ctx, 1)
         self.assertEqual(tmpl_stack.status, tmpl_stack.COMPLETE)
 
+    @mock.patch.object(stack_object.Stack, 'delete')
     @mock.patch.object(raw_template_object.RawTemplate, 'delete')
     @mock.patch.object(stack.Stack, 'store')
-    def test_mark_complete_stale_traversal(self, mock_store, mock_delete):
+    def test_mark_complete_update_delete(self, mock_store, mock_tmpl_delete,
+                                         mock_stack_delete):
+        tmpl = template.Template({
+            'HeatTemplateFormatVersion': '2012-12-12',
+            'Description': 'Empty Template'
+        })
+
+        tmpl_stack = stack.Stack(self.ctx, 'test', tmpl)
+        tmpl_stack.id = 2
+        tmpl_stack.t.id = 2
+        tmpl_stack.prev_raw_template_id = 1
+        tmpl_stack.action = tmpl_stack.DELETE
+        tmpl_stack.status = tmpl_stack.IN_PROGRESS
+        tmpl_stack.current_traversal = 'some-traversal'
+        tmpl_stack.mark_complete('some-traversal')
+        self.assertEqual(tmpl_stack.prev_raw_template_id,
+                         None)
+        mock_tmpl_delete.assert_called_once_with(self.ctx, 1)
+        mock_stack_delete.assert_called_once_with(self.ctx, 2)
+        self.assertEqual(tmpl_stack.status, tmpl_stack.COMPLETE)
+
+    @mock.patch.object(stack_object.Stack, 'delete')
+    @mock.patch.object(raw_template_object.RawTemplate, 'delete')
+    @mock.patch.object(stack.Stack, 'store')
+    def test_mark_complete_stale_traversal(self, mock_store, mock_tmpl_delete,
+                                           mock_stack_delete):
         tmpl = template.Template({
             'HeatTemplateFormatVersion': '2012-12-12',
             'Resources': {
@@ -2089,7 +2124,8 @@ class StackTest(common.HeatTestCase):
         tmpl_stack = stack.Stack(self.ctx, 'test', tmpl)
         tmpl_stack.current_traversal = 'new-traversal'
         tmpl_stack.mark_complete('old-traversal')
-        self.assertFalse(mock_delete.called)
+        self.assertFalse(mock_tmpl_delete.called)
+        self.assertFalse(mock_stack_delete.called)
         self.assertIsNone(tmpl_stack.prev_raw_template_id)
         self.assertFalse(mock_store.called)