Allow to specify a network for functional tests

Currently the tests just attach instances to the first network returned
by "net-list". That might however not be the right thing in some
environments. This change allows to override the default network via the
environment variable "OS_NOVACLIENT_NETWORK". If not specified the
test will fallback to the old behaviour and just use the first network.

Closes-Bug: #1510975
Change-Id: Ie682111127584a33d8e96377d812d3a6352c760d

novaclient/tests/functional/api/test_servers.py

@@ -19,7 +19,8 @@ class TestServersAPI(base.ClientTestBase):
     def test_server_ips(self):
         server_name = "test_server"
         initial_server = self.client.servers.create(
-            server_name, self.image, self.flavor)
+            server_name, self.image, self.flavor,
+            nics=[{"net-id": self.network.id}])
         self.addCleanup(initial_server.delete)
 
         for x in range(60):
@@ -32,4 +33,4 @@ class TestServersAPI(base.ClientTestBase):
             self.fail("Server %s did not go ACTIVE after 60s" % server)
 
         ips = self.client.servers.ips(server)
-        self.assertIn('private', ips)
+        self.assertIn(self.network.label, ips)

novaclient/tests/functional/base.py

@@ -45,6 +45,16 @@ def pick_image(images):
     raise NoImageException()
 
 
+def pick_network(networks):
+    network_name = os.environ.get('OS_NOVACLIENT_NETWORK')
+    if network_name:
+        for network in networks:
+            if network.label == network_name:
+                return network
+        raise NoNetworkException()
+    return networks[0]
+
+
 class NoImageException(Exception):
     """We couldn't find an acceptable image."""
     pass
@@ -55,6 +65,11 @@ class NoFlavorException(Exception):
     pass
 
 
+class NoNetworkException(Exception):
+    """We couldn't find an acceptable network."""
+    pass
+
+
 class NoCloudConfigException(Exception):
     """We couldn't find a cloud configuration."""
     pass
@@ -163,6 +178,7 @@ class ClientTestBase(testtools.TestCase):
         # pick some reasonable flavor / image combo
         self.flavor = pick_flavor(self.client.flavors.list())
         self.image = pick_image(self.client.images.list())
+        self.network = pick_network(self.client.networks.list())
 
         # create a CLI client in case we'd like to do CLI
         # testing. tempest_lib does this really weird thing where it

novaclient/tests/functional/v2/legacy/test_instances.py

@@ -40,10 +40,9 @@ class TestInstanceCLI(base.ClientTestBase):
         name = self.name_generate('Instance')
 
         # Boot via the cli, as we're primarily testing the cli in this test
-        network = self.client.networks.list()[0]
         self.nova('boot',
                   params="--flavor %s --image %s %s --nic net-id=%s --poll" %
-                  (self.flavor.name, self.image.name, name, network.id))
+                  (self.flavor.name, self.image.name, name, self.network.id))
 
         # Be nice about cleaning up, however, use the API for this to avoid
         # parsing text.

novaclient/tests/functional/v2/legacy/test_servers.py

@@ -75,11 +75,11 @@ class TestServersListNovaClient(base.ClientTestBase):
     COMPUTE_API_VERSION = "2.1"
 
     def _create_servers(self, name, number):
-        network = self.client.networks.list()[0]
         servers = []
         for i in range(number):
             servers.append(self.client.servers.create(
-                name, self.image, self.flavor, nics=[{"net-id": network.id}]))
+                name, self.image, self.flavor,
+                nics=[{"net-id": self.network.id}]))
             shell._poll_for_status(
                 self.client.servers.get, servers[-1].id,
                 'building', ['active'])

tox.ini

@@ -36,12 +36,14 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 
 [testenv:functional]
 basepython = python2.7
+passenv = OS_NOVACLIENT_TEST_NETWORK
 setenv =
   OS_TEST_PATH = ./novaclient/tests/functional
 commands = python setup.py testr --testr-args='--concurrency=1 {posargs}'
 
 [testenv:functional-py34]
 basepython = python3.4
+passenv = OS_NOVACLIENT_TEST_NETWORK
 setenv =
   OS_TEST_PATH = ./novaclient/tests/functional
 commands = python setup.py testr --testr-args='--concurrency=1 {posargs}'