Unit test for skipping network disconnect.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

compose/service.py

@@ -535,7 +535,7 @@ class Service(object):
 
     def _get_aliases(self, network, container=None):
         if container and container.labels.get(LABEL_ONE_OFF) == "True":
-            return set()
+            return []
 
         return list(
             {self.name} |

tests/integration/project_test.py

@@ -565,7 +565,11 @@ class ProjectTest(DockerClientTestCase):
                 'name': 'web',
                 'image': 'busybox:latest',
                 'command': 'top',
-                'networks': {'foo': None, 'bar': None, 'baz': None},
+                'networks': {
+                    'foo': None,
+                    'bar': None,
+                    'baz': {'aliases': ['extra']},
+                },
             }],
             volumes={},
             networks={
@@ -581,15 +585,23 @@ class ProjectTest(DockerClientTestCase):
             config_data=config_data,
         )
         project.up()
-        self.assertEqual(len(project.containers()), 1)
+
+        containers = project.containers()
+        assert len(containers) == 1
+        container, = containers
 
         for net_name in ['foo', 'bar', 'baz']:
             full_net_name = 'composetest_{}'.format(net_name)
             network_data = self.client.inspect_network(full_net_name)
-            self.assertEqual(network_data['Name'], full_net_name)
+            assert network_data['Name'] == full_net_name
+
+        aliases_key = 'NetworkSettings.Networks.{net}.Aliases'
+        assert 'web' in container.get(aliases_key.format(net='composetest_foo'))
+        assert 'web' in container.get(aliases_key.format(net='composetest_baz'))
+        assert 'extra' in container.get(aliases_key.format(net='composetest_baz'))
 
         foo_data = self.client.inspect_network('composetest_foo')
-        self.assertEqual(foo_data['Driver'], 'bridge')
+        assert foo_data['Driver'] == 'bridge'
 
     @v2_only()
     def test_up_with_ipam_config(self):

tests/unit/service_test.py

@@ -643,6 +643,35 @@ class ServiceTest(unittest.TestCase):
         assert service.image_name == 'testing_foo'
 
 
+class TestServiceNetwork(object):
+
+    def test_connect_container_to_networks_short_aliase_exists(self):
+        mock_client = mock.create_autospec(docker.Client)
+        service = Service(
+            'db',
+            mock_client,
+            'myproject',
+            image='foo',
+            networks={'project_default': {}})
+        container = Container(
+            None,
+            {
+                'Id': 'abcdef',
+                'NetworkSettings': {
+                    'Networks': {
+                        'project_default': {
+                            'Aliases': ['analias', 'abcdef'],
+                        },
+                    },
+                },
+            },
+            True)
+        service.connect_container_to_networks(container)
+
+        assert not mock_client.disconnect_container_from_network.call_count
+        assert not mock_client.connect_container_to_network.call_count
+
+
 def sort_by_name(dictionary_list):
     return sorted(dictionary_list, key=lambda k: k['name'])