Add docker client module

Change-Id: I27e87cc601b08fa44e7b4c1a0b8c007f4708b59c

tobiko/tests/functional/docker/test_client.py

@@ -0,0 +1,54 @@
+# Copyright (c) 2019 Red Hat, Inc.
+#
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+from __future__ import absolute_import
+
+import testtools
+
+from docker import client as docker_client
+from docker.models import containers
+
+from tobiko import docker
+from tobiko.openstack import topology
+
+
+class DockerClientTest(testtools.TestCase):
+
+    ssh_client = None
+
+    def setUp(self):
+        super(DockerClientTest, self).setUp()
+        for node in topology.list_openstack_nodes(group='controller'):
+            self.ssh_client = ssh_client = node.ssh_client
+            break
+        else:
+            self.skip('Any controller node found from OpenStack topology')
+
+        if not docker.is_docker_running(ssh_client=ssh_client):
+            self.skip('Docker server is not running')
+
+    def test_get_docker_client(self):
+        client = docker.get_docker_client(ssh_client=self.ssh_client)
+        self.assertIsInstance(client, docker.DockerClientFixture)
+
+    def test_connect_docker_client(self):
+        client = docker.get_docker_client(ssh_client=self.ssh_client).connect()
+        self.assertIsInstance(client, docker_client.DockerClient)
+        client.ping()
+
+    def test_list_docker_containers(self):
+        for container in docker.list_docker_containers(
+                ssh_client=self.ssh_client):
+            self.assertIsInstance(container, containers.Container)