Working DockerMixin for tests.

dev_requirements.txt

@@ -0,0 +1 @@
+docker[tls]==2.5.1

tests/testlib.py

@@ -1,11 +1,14 @@
 
 import os
+import random
 import sys
 import unittest
+import urlparse
 
 import mock
 
 import mitogen.master
+import docker
 
 
 DATA_DIR = os.path.join(os.path.dirname(__file__), 'data')
@@ -21,14 +24,51 @@ def data_path(suffix):
     return os.path.join(DATA_DIR, suffix)
 
 
-class BrokerMixin(object):
+class DockerizedSshDaemon(object):
+    def __init__(self):
+        self.docker = docker.from_env()
+        self.container_name = 'mitogen-test-%08x' % (random.getrandbits(64),)
+        self.container = self.docker.containers.run(
+            image='d2mw/mitogen-test',
+            detach=True,
+            remove=True,
+            publish_all_ports=True,
+        )
+        self.container.reload()
+        self.port = (self.container.attrs['NetworkSettings']['Ports']
+                                         ['22/tcp'][0]['HostPort'])
+        self.host = self.get_host()
+
+    def get_host(self):
+        parsed = urlparse.urlparse(self.docker.api.base_url)
+        return parsed.netloc.partition(':')[0]
+
+    def close(self):
+        self.container.stop()
+
+
+class RouterMixin(object):
     broker_class = mitogen.master.Broker
+    router_class = mitogen.master.Router
 
     def setUp(self):
-        super(BrokerMixin, self).setUp()
+        super(RouterMixin, self).setUp()
         self.broker = self.broker_class()
+        self.router = self.router_class(self.broker)
 
     def tearDown(self):
         self.broker.shutdown()
         self.broker.join()
-        super(BrokerMixin, self).tearDown()
+        super(RouterMixin, self).tearDown()
+
+
+class DockerMixin(RouterMixin):
+    @classmethod
+    def setUpClass(cls):
+        super(DockerMixin, cls).setUpClass()
+        cls.dockerized_ssh = DockerizedSshDaemon()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.dockerized_ssh.close()
+        super(DockerMixin, cls).tearDownClass()