Add unit tests for "server lock" command.

Change-Id: I0396fc4836ee918298bbe3860b7c1f42d3b97e33
Implements: blueprint osc-unit-test-framework-improvement

Author: tang-chen

openstackclient/tests/compute/v2/test_server.py

@@ -611,6 +611,26 @@ def test_server_image_create_name(self):
         self.assertEqual(datalist, data)
 
 
+class TestServerLock(TestServer):
+
+    def setUp(self):
+        super(TestServerLock, self).setUp()
+
+        # Get the command object to test
+        self.cmd = server.LockServer(self.app, None)
+
+        # Set methods to be tested.
+        self.methods = {
+            'lock': None,
+        }
+
+    def test_server_lock_one_server(self):
+        self.run_method_with_servers('lock', 1)
+
+    def test_server_lock_multi_servers(self):
+        self.run_method_with_servers('lock', 3)
+
+
 class TestServerPause(TestServer):
 
     def setUp(self):