Replace stubout with fixtures

blueprint remove-mox

The last step in removing mox is to remove stubout usage. Lucky for us,
the fixtures library, which we are already using, can take on the
challenge quite well.

Change-Id: Id33cc8988935a1905f9a14351964f0bb24ef82e3

neutron/common/exceptions.py

@@ -19,8 +19,6 @@
 Neutron base exception handling.
 """
 
-_FATAL_EXCEPTION_FORMAT_ERRORS = False
-
 
 class NeutronException(Exception):
     """Base Neutron Exception.
@@ -36,7 +34,7 @@ class NeutronException(Exception):
             super(NeutronException, self).__init__(self.message % kwargs)
             self.msg = self.message % kwargs
         except Exception:
-            if _FATAL_EXCEPTION_FORMAT_ERRORS:
+            if self.use_fatal_exceptions():
                 raise
             else:
                 # at least get the core message out if something happened
@@ -45,6 +43,9 @@ class NeutronException(Exception):
     def __unicode__(self):
         return unicode(self.msg)
 
+    def use_fatal_exceptions(self):
+        return False
+
 
 class BadRequest(NeutronException):
     message = _('Bad %(resource)s request: %(msg)s')

neutron/tests/base.py

@@ -24,17 +24,18 @@ import os
 import eventlet.timeout
 import fixtures
 from oslo.config import cfg
-import stubout
 import testtools
 
-from neutron.common import exceptions
-
 
 CONF = cfg.CONF
 TRUE_STRING = ['True', '1']
 LOG_FORMAT = "%(asctime)s %(levelname)8s [%(name)s] %(message)s"
 
 
+def fake_use_fatal_exceptions(*args):
+    return True
+
+
 class BaseTestCase(testtools.TestCase):
 
     def setUp(self):
@@ -72,8 +73,9 @@ class BaseTestCase(testtools.TestCase):
         if os.environ.get('OS_STDERR_CAPTURE') in TRUE_STRING:
             stderr = self.useFixture(fixtures.StringStream('stderr')).stream
             self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
-        self.stubs = stubout.StubOutForTesting()
-        self.stubs.Set(exceptions, '_FATAL_EXCEPTION_FORMAT_ERRORS', True)
+        self.useFixture(fixtures.MonkeyPatch(
+            'neutron.common.exceptions.NeutronException.use_fatal_exceptions',
+            fake_use_fatal_exceptions))
 
     def config(self, **kw):
         """Override some configuration values.

neutron/tests/unit/linuxbridge/test_rpcapi.py

@@ -18,13 +18,12 @@
 Unit Tests for linuxbridge rpc
 """
 
+import fixtures
 from oslo.config import cfg
-import stubout
 
 from neutron.agent import rpc as agent_rpc
 from neutron.common import topics
 from neutron.openstack.common import context
-from neutron.openstack.common import rpc
 from neutron.plugins.linuxbridge import lb_neutron_plugin as plb
 from neutron.tests import base
 
@@ -49,8 +48,8 @@ class rpcApiTestCase(base.BaseTestCase):
             if expected_retval:
                 return expected_retval
 
-        self.stubs = stubout.StubOutForTesting()
-        self.stubs.Set(rpc, rpc_method, _fake_rpc_method)
+        self.useFixture(fixtures.MonkeyPatch(
+            'neutron.openstack.common.rpc.' + rpc_method, _fake_rpc_method))
 
         retval = getattr(rpcapi, method)(ctxt, **kwargs)
 

neutron/tests/unit/mlnx/test_rpcapi.py

@@ -19,13 +19,12 @@
 Unit Tests for Mellanox RPC (major reuse of linuxbridge rpc unit tests)
 """
 
+import fixtures
 from oslo.config import cfg
-import stubout
 
 from neutron.agent import rpc as agent_rpc
 from neutron.common import topics
 from neutron.openstack.common import context
-from neutron.openstack.common import rpc
 from neutron.plugins.mlnx import agent_notify_api
 from neutron.tests import base
 
@@ -51,8 +50,8 @@ class rpcApiTestCase(base.BaseTestCase):
             if expected_retval:
                 return expected_retval
 
-        self.stubs = stubout.StubOutForTesting()
-        self.stubs.Set(rpc, rpc_method, _fake_rpc_method)
+        self.useFixture(fixtures.MonkeyPatch(
+            'neutron.openstack.common.rpc.' + rpc_method, _fake_rpc_method))
 
         retval = getattr(rpcapi, method)(ctxt, **kwargs)
 

neutron/tests/unit/openvswitch/test_ovs_rpcapi.py

@@ -18,12 +18,11 @@
 Unit Tests for openvswitch rpc
 """
 
-import stubout
+import fixtures
 
 from neutron.agent import rpc as agent_rpc
 from neutron.common import topics
 from neutron.openstack.common import context
-from neutron.openstack.common import rpc
 from neutron.plugins.openvswitch.common import constants
 from neutron.plugins.openvswitch import ovs_neutron_plugin as povs
 from neutron.tests import base
@@ -48,8 +47,8 @@ class rpcApiTestCase(base.BaseTestCase):
             if expected_retval:
                 return expected_retval
 
-        self.stubs = stubout.StubOutForTesting()
-        self.stubs.Set(rpc, rpc_method, _fake_rpc_method)
+        self.useFixture(fixtures.MonkeyPatch(
+            'neutron.openstack.common.rpc.' + rpc_method, _fake_rpc_method))
 
         retval = getattr(rpcapi, method)(ctxt, **kwargs)
 

neutron/tests/unit/test_extension_ext_gw_mode.py

@@ -18,9 +18,6 @@
 # @author: Salvatore Orlando, Nicira, Inc
 #
 
-import stubout
-
-import fixtures
 import mock
 from oslo.config import cfg
 from webob import exc
@@ -49,25 +46,6 @@ FAKE_ROUTER_PORT_ID = _uuid()
 FAKE_ROUTER_PORT_MAC = 'bb:bb:bb:bb:bb:bb'
 
 
-class StuboutFixture(fixtures.Fixture):
-    """Setup stubout and add unsetAll to cleanup."""
-
-    def setUp(self):
-        super(StuboutFixture, self).setUp()
-        self.stubs = stubout.StubOutForTesting()
-        self.addCleanup(self.stubs.UnsetAll)
-        self.addCleanup(self.stubs.SmartUnsetAll)
-
-
-def stubout_floating_ip_calls(stubs, fake_count=0):
-
-    def get_floatingips_count(_1, _2, filters):
-        return fake_count
-
-    stubs.Set(l3_db.L3_NAT_db_mixin, 'get_floatingips_count',
-              get_floatingips_count)
-
-
 class TestExtensionManager(object):
 
     def get_resources(self):
@@ -104,8 +82,6 @@ class TestL3GwModeMixin(base.BaseTestCase):
 
     def setUp(self):
         super(TestL3GwModeMixin, self).setUp()
-        stubout_fixture = self.useFixture(StuboutFixture())
-        self.stubs = stubout_fixture.stubs
         self.target_object = TestDbIntPlugin()
         # Patch the context
         ctx_patcher = mock.patch('neutron.context', autospec=True)

test-requirements.txt

@@ -5,7 +5,6 @@ coverage>=3.6
 discover
 fixtures>=0.3.14
 mock>=1.0
-mox>=0.5.3
 python-subunit
 sphinx>=1.1.2
 testrepository>=0.0.17