Add action 'user password set' for identiy v3

This new action will allow a user to change their own password by
either providing the new password as an argument (--password) or by
being prompted to enter the new password.
In both cases user will be prompted to enter their current password
as required by the v3 API.

Closes-Bug: #1337245
Change-Id: I5e1e0fd2b46a4502318da57f7cce2b236fb2d93d

3 files changed, 83 insertions, 3 deletions

diff --git a/openstackclient/common/utils.py b/openstackclient/common/utils.py
index 0258f931..54a06b04 100644
--- a/openstackclient/common/utils.py
+++ b/openstackclient/common/utils.py
@@ -233,12 +233,15 @@ def get_effective_log_level():
     return min_log_lvl
 
 
-def get_password(stdin):
+def get_password(stdin, prompt=None, confirm=True):
+    message = prompt or "User Password:"
     if hasattr(stdin, 'isatty') and stdin.isatty():
         try:
             while True:
-                first_pass = getpass.getpass("User password: ")
-                second_pass = getpass.getpass("Repeat user password: ")
+                first_pass = getpass.getpass(message)
+                if not confirm:
+                    return first_pass
+                second_pass = getpass.getpass("Repeat " + message)
                 if first_pass == second_pass:
                     return first_pass
                 print("The passwords entered were not the same")
diff --git a/openstackclient/identity/v3/user.py b/openstackclient/identity/v3/user.py
index 38c34973..6ba54368 100644
--- a/openstackclient/identity/v3/user.py
+++ b/openstackclient/identity/v3/user.py
@@ -323,6 +323,35 @@ class SetUser(command.Command):
         return
 
 
+class SetPasswordUser(command.Command):
+    """Change current user password"""
+
+    log = logging.getLogger(__name__ + '.SetPasswordUser')
+
+    def get_parser(self, prog_name):
+        parser = super(SetPasswordUser, self).get_parser(prog_name)
+        parser.add_argument(
+            '--password',
+            metavar='<new-password>',
+            help='New user password'
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        self.log.debug('take_action(%s)', parsed_args)
+        identity_client = self.app.client_manager.identity
+
+        current_password = utils.get_password(
+            self.app.stdin, prompt="Current Password:", confirm=False)
+
+        password = parsed_args.password
+        if password is None:
+            password = utils.get_password(
+                self.app.stdin, prompt="New Password:")
+
+        identity_client.users.update_password(current_password, password)
+
+
 class ShowUser(show.ShowOne):
     """Show user details"""
 
diff --git a/openstackclient/tests/identity/v3/test_user.py b/openstackclient/tests/identity/v3/test_user.py
index 569d9140..42df5773 100644
--- a/openstackclient/tests/identity/v3/test_user.py
+++ b/openstackclient/tests/identity/v3/test_user.py
@@ -13,7 +13,9 @@
 #   under the License.
 #
 
+import contextlib
 import copy
+
 import mock
 
 from openstackclient.identity.v3 import user
@@ -944,6 +946,52 @@ class TestUserSet(TestUser):
         )
 
 
+class TestUserSetPassword(TestUser):
+
+    def setUp(self):
+        super(TestUserSetPassword, self).setUp()
+        self.cmd = user.SetPasswordUser(self.app, None)
+
+    @staticmethod
+    @contextlib.contextmanager
+    def _mock_get_password(*passwords):
+        mocker = mock.Mock(side_effect=passwords)
+        with mock.patch("openstackclient.common.utils.get_password", mocker):
+            yield
+
+    def test_user_password_change(self):
+        current_pass = 'old_pass'
+        new_pass = 'new_pass'
+        arglist = [
+            '--password', new_pass,
+        ]
+        verifylist = [
+            ('password', new_pass),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        # Mock getting user current password.
+        with self._mock_get_password(current_pass):
+            self.cmd.take_action(parsed_args)
+
+        self.users_mock.update_password.assert_called_with(
+            current_pass, new_pass
+        )
+
+    def test_user_create_password_prompt(self):
+        current_pass = 'old_pass'
+        new_pass = 'new_pass'
+        parsed_args = self.check_parser(self.cmd, [], [])
+
+        # Mock getting user current and new password.
+        with self._mock_get_password(current_pass, new_pass):
+            self.cmd.take_action(parsed_args)
+
+        self.users_mock.update_password.assert_called_with(
+            current_pass, new_pass
+        )
+
+
 class TestUserShow(TestUser):
 
     def setUp(self):