Add token auth test

Add a ClientManager test for Token authentication (specifically
keystoneauth's admin_token) that got dropped in the move from
OSC because OSC uses its own token_endpoint plugin loader, but
creates the same AdminToken object.

This would have prevented the issues seen with the merging of
https://review.openstack.org/452711 that were subsequently reverted
in https://review.openstack.org/458586.

Change-Id: I516682057d759d4becd8f6675cf7fa262d224eb9

osc_lib/tests/test_clientmanager.py

@@ -21,6 +21,7 @@ from keystoneauth1 import exceptions as ksa_exceptions
 from keystoneauth1.identity import generic as generic_plugin
 from keystoneauth1.identity.v3 import k2k
 from keystoneauth1 import loading
+from keystoneauth1 import token_endpoint
 from os_client_config import cloud_config
 
 from osc_lib.api import auth
@@ -71,6 +72,35 @@ class TestClientCache(utils.TestCase):
 
 class TestClientManager(utils.TestClientManager):
 
+    def test_client_manager_admin_token(self):
+        token_auth = {
+            'endpoint': fakes.AUTH_URL,
+            'token': fakes.AUTH_TOKEN,
+        }
+        client_manager = self._make_clientmanager(
+            auth_args=token_auth,
+            auth_plugin_name='admin_token',
+        )
+
+        self.assertEqual(
+            fakes.AUTH_URL,
+            client_manager._cli_options.config['auth']['endpoint'],
+        )
+        self.assertEqual(
+            fakes.AUTH_TOKEN,
+            client_manager.auth.get_token(None),
+        )
+        self.assertIsInstance(
+            client_manager.auth,
+            token_endpoint.Token,
+        )
+        # NOTE(dtroyer): This is intentionally not assertFalse() as the return
+        #                value from is_service_available() may be == None
+        self.assertNotEqual(
+            False,
+            client_manager.is_service_available('network'),
+        )
+
     def test_client_manager_password(self):
         client_manager = self._make_clientmanager()