Consistency of the --all argument for snapshots

This change is inspired by the volume.py.
It allow the user to use openstack snapshot list --all.

Closes-Bug: #1517386

Change-Id: I72a53fcd0c5c5af539cd88b37e71b4331fa67473

doc/source/command-objects/snapshot.rst

@@ -60,6 +60,11 @@ List snapshots
 .. code:: bash
 
     os snapshot list
+        [--all-projects]
+
+.. option:: --all-projects
+
+    Include all projects (admin only)
 
 .. option:: --long
 

openstackclient/tests/volume/v2/test_snapshot.py

@@ -225,6 +225,7 @@ class TestSnapshotList(TestSnapshot):
     def test_snapshot_list_without_options(self):
         arglist = []
         verifylist = [
+            ('all_projects', False),
             ("long", False)
         ]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
@@ -243,7 +244,7 @@ class TestSnapshotList(TestSnapshot):
 
     def test_snapshot_list_with_options(self):
         arglist = ["--long"]
-        verifylist = [("long", True)]
+        verifylist = [("long", True), ('all_projects', False)]
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
 
         columns, data = self.cmd.take_action(parsed_args)
@@ -263,3 +264,33 @@ class TestSnapshotList(TestSnapshot):
             volume_fakes.EXPECTED_SNAPSHOT.get("properties")
         ),)
         self.assertEqual(datalist, tuple(data))
+
+    def test_snapshot_list_all_projects(self):
+        arglist = [
+            '--all-projects',
+        ]
+        verifylist = [
+            ('long', False),
+            ('all_projects', True)
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        columns, data = self.cmd.take_action(parsed_args)
+
+        collist = [
+            "ID",
+            "Name",
+            "Description",
+            "Status",
+            "Size"
+        ]
+        self.assertEqual(collist, columns)
+
+        datalist = ((
+            volume_fakes.snapshot_id,
+            volume_fakes.snapshot_name,
+            volume_fakes.snapshot_description,
+            "available",
+            volume_fakes.snapshot_size
+        ), )
+        self.assertEqual(datalist, tuple(data))

openstackclient/volume/v1/snapshot.py

@@ -110,6 +110,12 @@ class ListSnapshot(lister.Lister):
 
     def get_parser(self, prog_name):
         parser = super(ListSnapshot, self).get_parser(prog_name)
+        parser.add_argument(
+            '--all-projects',
+            action='store_true',
+            default=False,
+            help='Include all projects (admin only)',
+        )
         parser.add_argument(
             '--long',
             action='store_true',
@@ -157,7 +163,12 @@ class ListSnapshot(lister.Lister):
             # Just forget it if there's any trouble
             pass
 
-        data = self.app.client_manager.volume.volume_snapshots.list()
+        search_opts = {
+            'all_tenants': parsed_args.all_projects,
+        }
+
+        data = self.app.client_manager.volume.volume_snapshots.list(
+            search_opts=search_opts)
         return (column_headers,
                 (utils.get_item_properties(
                     s, columns,

openstackclient/volume/v2/snapshot.py

@@ -107,6 +107,12 @@ class ListSnapshot(lister.Lister):
 
     def get_parser(self, prog_name):
         parser = super(ListSnapshot, self).get_parser(prog_name)
+        parser.add_argument(
+            '--all-projects',
+            action='store_true',
+            default=False,
+            help='Include all projects (admin only)',
+        )
         parser.add_argument(
             '--long',
             action='store_true',
@@ -149,7 +155,12 @@ class ListSnapshot(lister.Lister):
             # Just forget it if there's any trouble
             pass
 
-        data = self.app.client_manager.volume.volume_snapshots.list()
+        search_opts = {
+            'all_tenants': parsed_args.all_projects,
+        }
+
+        data = self.app.client_manager.volume.volume_snapshots.list(
+            search_opts=search_opts)
         return (column_headers,
                 (utils.get_item_properties(
                     s, columns,