Test network_aliases feature

Signed-off-by: Joffrey F <joffrey@docker.com>

compose/project.py

@@ -73,7 +73,9 @@ class Project(object):
 
             service_dict.pop('networks', None)
             links = project.get_links(service_dict)
-            network_mode = project.get_network_mode(service_dict, service_networks.keys())
+            network_mode = project.get_network_mode(
+                service_dict, list(service_networks.keys())
+            )
             volumes_from = get_volumes_from(project, service_dict)
 
             if config_data.version != V1:

tests/acceptance/cli_test.py

@@ -445,6 +445,33 @@ class CLITestCase(DockerClientTestCase):
 
         assert networks[0]['Options']['com.docker.network.bridge.enable_icc'] == 'false'
 
+    def test_up_with_network_aliases(self):
+        filename = 'network-aliases.yml'
+        self.base_dir = 'tests/fixtures/networks'
+        self.dispatch(['-f', filename, 'up', '-d'], None)
+        back_name = '{}_back'.format(self.project.name)
+        front_name = '{}_front'.format(self.project.name)
+
+        networks = [
+            n for n in self.client.networks()
+            if n['Name'].startswith('{}_'.format(self.project.name))
+        ]
+
+        # Two networks were created: back and front
+        assert sorted(n['Name'] for n in networks) == [back_name, front_name]
+        web_container = self.project.get_service('web').containers()[0]
+
+        back_aliases = web_container.get(
+            'NetworkSettings.Networks.{}.Aliases'.format(back_name)
+        )
+        assert 'web' in back_aliases
+        front_aliases = web_container.get(
+            'NetworkSettings.Networks.{}.Aliases'.format(front_name)
+        )
+        assert 'web' in front_aliases
+        assert 'forward_facing' in front_aliases
+        assert 'ahead' in front_aliases
+
     @v2_only()
     def test_up_with_networks(self):
         self.base_dir = 'tests/fixtures/networks'

tests/fixtures/networks/network-aliases.yml

@@ -0,0 +1,18 @@
+version: "2"
+
+services:
+  web:
+    image: busybox
+    command: top
+    networks:
+      - front
+      - back
+
+    network_aliases:
+      front:
+        - forward_facing
+        - ahead
+
+networks:
+  front: {}
+  back: {}

tests/unit/config/config_test.py

@@ -543,6 +543,27 @@ class ConfigTest(unittest.TestCase):
         assert services[1]['name'] == 'db'
         assert services[2]['name'] == 'web'
 
+    def test_invalid_network_alias(self):
+        config_details = build_config_details({
+            'version': '2',
+            'services': {
+                'web': {
+                    'image': 'busybox',
+                    'networks': ['hello'],
+                    'network_aliases': {
+                        'world': ['planet', 'universe']
+                    }
+                }
+            },
+            'networks': {
+                'hello': {},
+                'world': {}
+            }
+        })
+        with pytest.raises(ConfigurationError) as exc:
+            config.load(config_details)
+        assert 'not declared in the networks list' in exc.exconly()
+
     def test_config_build_configuration(self):
         service = config.load(
             build_config_details(