Add instance-delete to OSC

This change adds database support to the python-openstackclient
project for the instance-delete command.

The trove command delete is now:
    openstack database instance delete

Change-Id: Id052d14190e9fbdfe10db4e043fa78d6aef83ba9
Partially-Implements: trove-support-in-python-openstackclient

releasenotes/notes/add-instance-delete-to-osc-bf8de501c8945d58.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The command ``trove delete`` is now available to use in
+    the python-openstackclient CLI as ``openstack database instance delete``

setup.cfg

@@ -38,6 +38,7 @@ openstack.database.v1 =
     database_configuration_show = troveclient.osc.v1.database_configurations:ShowDatabaseConfiguration
     database_flavor_list = troveclient.osc.v1.database_flavors:ListDatabaseFlavors
     database_flavor_show = troveclient.osc.v1.database_flavors:ShowDatabaseFlavor
+    database_instance_delete = troveclient.osc.v1.database_instances:DeleteDatabaseInstance
     database_instance_list = troveclient.osc.v1.database_instances:ListDatabaseInstances
     database_instance_show = troveclient.osc.v1.database_instances:ShowDatabaseInstance
     database_limit_list = troveclient.osc.v1.database_limits:ListDatabaseLimits

troveclient/osc/v1/database_instances.py

@@ -13,6 +13,7 @@
 """Database v1 Instances action implementations"""
 
 from osc_lib.command import command
+from osc_lib import exceptions
 from osc_lib import utils as osc_utils
 import six
 
@@ -133,3 +134,28 @@ class ShowDatabaseInstance(command.ShowOne):
         instance = osc_utils.find_resource(db_instances, parsed_args.instance)
         instance = set_attributes_for_print_detail(instance)
         return zip(*sorted(six.iteritems(instance)))
+
+
+class DeleteDatabaseInstance(command.Command):
+
+    _description = _("Deletes an instance.")
+
+    def get_parser(self, prog_name):
+        parser = super(DeleteDatabaseInstance, self).get_parser(prog_name)
+        parser.add_argument(
+            'instance',
+            metavar='<instance>',
+            help=_('ID or name of the Instance'),
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        db_instances = self.app.client_manager.database.instances
+        try:
+            instance = osc_utils.find_resource(db_instances,
+                                               parsed_args.instance)
+            db_instances.delete(instance)
+        except Exception as e:
+            msg = (_("Failed to delete instance %(instance)s: %(e)s")
+                   % {'instance': parsed_args.instance, 'e': e})
+            raise exceptions.CommandError(msg)

troveclient/tests/osc/v1/test_database_instances.py

@@ -10,6 +10,11 @@
 #   License for the specific language governing permissions and limitations
 #   under the License.
 
+import mock
+
+from osc_lib import exceptions
+from osc_lib import utils
+
 from troveclient import common
 from troveclient.osc.v1 import database_instances
 from troveclient.tests.osc.v1 import fakes
@@ -77,3 +82,29 @@ class TestInstanceShow(TestInstances):
         columns, data = self.cmd.take_action(parsed_args)
         self.assertEqual(self.columns, columns)
         self.assertEqual(self.values, data)
+
+
+class TestDatabaseInstanceDelete(TestInstances):
+
+    def setUp(self):
+        super(TestDatabaseInstanceDelete, self).setUp()
+        self.cmd = database_instances.DeleteDatabaseInstance(self.app, None)
+
+    @mock.patch.object(utils, 'find_resource')
+    def test_instance_delete(self, mock_find):
+        args = ['instance1']
+        mock_find.return_value = args[0]
+        parsed_args = self.check_parser(self.cmd, args, [])
+        result = self.cmd.take_action(parsed_args)
+        self.instance_client.delete.assert_called_with('instance1')
+        self.assertIsNone(result)
+
+    @mock.patch.object(utils, 'find_resource')
+    def test_instance_delete_with_exception(self, mock_find):
+        args = ['fakeinstance']
+        parsed_args = self.check_parser(self.cmd, args, [])
+
+        mock_find.side_effect = exceptions.CommandError
+        self.assertRaises(exceptions.CommandError,
+                          self.cmd.take_action,
+                          parsed_args)