Add identity.group_users method

Add method to list users of a group.

Change-Id: Ic2986b107c921752c9e174fe4b7209eec9bf7704

doc/source/user/proxies/identity_v3.rst

@@ -43,7 +43,7 @@ Group Operations
   :noindex:
   :members: create_group, update_group, delete_group, get_group, find_group,
             groups, add_user_to_group, remove_user_from_group,
-            check_user_in_group
+            check_user_in_group, group_users
 
 Policy Operations
 ^^^^^^^^^^^^^^^^^

openstack/identity/v3/_proxy.py

@@ -44,6 +44,7 @@ from openstack.identity.v3 import system as _system
 from openstack.identity.v3 import trust as _trust
 from openstack.identity.v3 import user as _user
 from openstack import proxy
+from openstack import utils
 
 
 class Proxy(proxy.Proxy):
@@ -405,6 +406,21 @@ class Proxy(proxy.Proxy):
         group = self._get_resource(_group.Group, group)
         return group.check_user(self, user)
 
+    def group_users(self, group, **attrs):
+        """List users in a group
+
+        :param group: Either the ID of a group or a
+            :class:`~openstack.identity.v3.group.Group` instance.
+        :param attrs: Only password_expires_at can be filter for result.
+
+        :return: List of :class:`~openstack.identity.v3.user.User`
+        """
+        group = self._get_resource(_group.Group, group)
+        base_path = utils.urljoin(
+            group.base_path, group.id, 'users')
+        users = self._list(_user.User, base_path=base_path, **attrs)
+        return users
+
     def create_policy(self, **attrs):
         """Create a new policy from attributes
 

openstack/tests/unit/identity/v3/test_proxy.py

@@ -168,6 +168,12 @@ class TestIdentityProxyGroup(TestIdentityProxyBase):
             ]
         )
 
+    def test_group_users(self):
+        self.verify_list(
+            self.proxy.group_users, user.User,
+            method_kwargs={"group": 'group', "attrs": 1},
+            expected_kwargs={"attrs": 1})
+
 
 class TestIdentityProxyPolicy(TestIdentityProxyBase):
 

releasenotes/notes/add-identity-group-users-proxy-method-e37f8983b2406819.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add possibility to list users in the group.