Added validation of new password during changing in fuel-cli

Change-Id: I26f1a94d9137b246d248299b4842038ae293b43a
Closes-Bug: #1349734

fuelclient/cli/actions/user.py

@@ -14,6 +14,7 @@
 
 from fuelclient.cli.actions.base import Action
 import fuelclient.cli.arguments as Args
+from fuelclient.cli.error import ArgumentException
 from fuelclient.client import APIClient
 
 
@@ -37,4 +38,8 @@ class UserAction(Action):
         """To change user password:
                 fuel user change-password
         """
-        APIClient.update_own_password(params.newpass)
+        if params.newpass:
+            APIClient.update_own_password(params.newpass)
+        else:
+            raise ArgumentException(
+                "Expect password [--newpass NEWPASS]")

tests/test_client.py

@@ -128,6 +128,15 @@ class TestHandlers(BaseTestCase):
         )
 
 
+class TestUserActions(BaseTestCase):
+
+    def test_change_password_params(self):
+        cmd = "user --change-password"
+        msg = "Expect password [--newpass NEWPASS]"
+        result = self.run_cli_command(cmd, check_errors=True)
+        self.assertTrue(msg, result)
+
+
 class TestCharset(BaseTestCase):
 
     def test_charset_problem(self):