Implement restore operation

This adds new methods to manage snapshot restoration.

blueprint stack-snapshot
Co-Authored-By: ala.rezmerita@cloudwatt.com

Change-Id: I917c5d89f586110c0614e05e134bebde27d4db55

heatclient/tests/test_shell.py

@@ -1844,6 +1844,32 @@ class ShellTestUserPass(ShellBase):
         resp = self.shell('snapshot-delete teststack/1 2')
         self.assertEqual("", resp)
 
+    @httpretty.activate
+    def test_stack_restore(self):
+        self.register_keystone_auth_fixture()
+
+        stack_dict = {"stack": {
+            "id": "1",
+            "stack_name": "teststack",
+            "stack_status": 'CREATE_COMPLETE',
+            "creation_time": "2012-10-25T01:58:47Z"
+        }}
+
+        resp = fakes.FakeHTTPResponse(
+            204,
+            'No Content',
+            {},
+            None)
+        http.HTTPClient.json_request(
+            'GET', '/stacks/teststack/1').AndReturn((resp, stack_dict))
+        http.HTTPClient.json_request(
+            'POST',
+            '/stacks/teststack/1/snapshots/2/restore').AndReturn((resp, {}))
+
+        self.m.ReplayAll()
+        resp = self.shell('stack-restore teststack/1 2')
+        self.assertEqual("", resp)
+
     @httpretty.activate
     def test_snapshot_list(self):
         self.register_keystone_auth_fixture()

heatclient/tests/test_stacks.py

@@ -125,6 +125,13 @@ class StackOperationsTest(testtools.TestCase):
         manager.snapshot_delete.assert_called_once_with(
             'the_stack/abcd1234', 'snap1234')
 
+    def test_restore(self):
+        manager = MagicMock()
+        stack = mock_stack(manager, 'the_stack', 'abcd1234')
+        stack.restore('snap1234')
+        manager.restore.assert_called_once_with(
+            'the_stack/abcd1234', 'snap1234')
+
     def test_snapshot_list(self):
         manager = MagicMock()
         stack = mock_stack(manager, 'the_stack', 'abcd1234')

heatclient/v1/shell.py

@@ -942,6 +942,19 @@ def do_snapshot_delete(hc, args):
         raise exc.CommandError('Stack or snapshot not found')
 
 
+@utils.arg('id', metavar='<NAME or ID>',
+           help='Name or ID of the stack containing the snapshot.')
+@utils.arg('snapshot', metavar='<SNAPSHOT>',
+           help='The ID of the snapshot to restore.')
+def do_stack_restore(hc, args):
+    '''Restore a snapshot of a stack.'''
+    fields = {'stack_id': args.id, 'snapshot_id': args.snapshot}
+    try:
+        hc.stacks.restore(**fields)
+    except exc.HTTPNotFound:
+        raise exc.CommandError('Stack or snapshot not found')
+
+
 @utils.arg('id', metavar='<NAME or ID>',
            help='Name or ID of the stack containing the snapshots.')
 def do_snapshot_list(hc, args):

heatclient/v1/stacks.py

@@ -47,6 +47,9 @@ class Stack(base.Resource):
     def snapshot_delete(self, snapshot_id):
         return self.manager.snapshot_delete(self.identifier, snapshot_id)
 
+    def restore(self, snapshot_id):
+        return self.manager.restore(self.identifier, snapshot_id)
+
     def snapshot_list(self):
         return self.manager.snapshot_list(self.identifier)
 
@@ -176,6 +179,14 @@ class StackManager(base.BaseManager):
             '/stacks/%s/snapshots/%s' % (stack.identifier, snapshot_id))
         return body
 
+    def restore(self, stack_id, snapshot_id):
+        stack = self.get(stack_id)
+        resp, body = self.client.json_request(
+            'POST',
+            '/stacks/%s/snapshots/%s/restore' % (stack.identifier,
+                                                 snapshot_id))
+        return body
+
     def snapshot_list(self, stack_id):
         stack = self.get(stack_id)
         resp, body = self.client.json_request(