Use more specific asserts in tests

Instead of assertTrue and assertFalse use more specific asserts.
They are compatible with Python 2.7[1] and 3.4[2]

[1]: https://docs.python.org/2.7/library/unittest.html
[2]: https://docs.python.org/3.4/library/unittest.html

Change-Id: Ifee66714db561fb329911395b2cfdd90c689b609

heat/tests/api/test_wsgi.py

@@ -380,7 +380,7 @@ class JSONRequestDeserializerTest(common.HeatTestCase):
     def test_from_json_exceeds_max_json_mb(self):
         cfg.CONF.set_override('max_json_body_size', 10, enforce_type=True)
         body = json.dumps(['a'] * cfg.CONF.max_json_body_size)
-        self.assertTrue(len(body) > cfg.CONF.max_json_body_size)
+        self.assertGreater(len(body), cfg.CONF.max_json_body_size)
         error = self.assertRaises(exception.RequestLimitExceeded,
                                   wsgi.JSONRequestDeserializer().from_json,
                                   body)

heat/tests/autoscaling/test_heat_scaling_group.py

@@ -523,7 +523,7 @@ class RollingUpdatePolicyTest(common.HeatTestCase):
         tmpl_batch_sz = int(tmpl_policy['max_batch_size'])
         policy = stack['my-group'].properties['rolling_updates']
         self.assertTrue(policy)
-        self.assertTrue(len(policy) == 3)
+        self.assertEqual(3, len(policy))
         self.assertEqual(1, int(policy['min_in_service']))
         self.assertEqual(tmpl_batch_sz, int(policy['max_batch_size']))
         self.assertEqual(1, policy['pause_time'])

heat/tests/autoscaling/test_scaling_group.py

@@ -631,7 +631,8 @@ class RollingUpdatePolicyTest(common.HeatTestCase):
         self.assertEqual(1, len(grp.update_policy))
         self.assertIn('AutoScalingRollingUpdate', grp.update_policy)
         policy = grp.update_policy['AutoScalingRollingUpdate']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(1, int(policy['MinInstancesInService']))
         self.assertEqual(tmpl_batch_sz, int(policy['MaxBatchSize']))
         self.assertEqual('PT1S', policy['PauseTime'])
@@ -646,7 +647,8 @@ class RollingUpdatePolicyTest(common.HeatTestCase):
         self.assertEqual(1, len(grp.update_policy))
         self.assertIn('AutoScalingRollingUpdate', grp.update_policy)
         policy = grp.update_policy['AutoScalingRollingUpdate']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(0, int(policy['MinInstancesInService']))
         self.assertEqual(1, int(policy['MaxBatchSize']))
         self.assertEqual('PT0S', policy['PauseTime'])

heat/tests/aws/test_instance.py

@@ -175,7 +175,7 @@ class InstancesTest(common.HeatTestCase):
         instance = self._create_test_instance(return_server,
                                               'in_create')
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         expected_ip = return_server.networks['public'][0]
         expected_az = getattr(return_server, 'OS-EXT-AZ:availability_zone')
@@ -197,7 +197,7 @@ class InstancesTest(common.HeatTestCase):
         instance = self._create_test_instance(return_server,
                                               'create_with_bdm')
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         expected_ip = return_server.networks['public'][0]
         expected_az = getattr(return_server, 'OS-EXT-AZ:availability_zone')
@@ -375,7 +375,7 @@ class InstancesTest(common.HeatTestCase):
         scheduler.TaskRunner(instance.create)()
 
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         expected_ip = return_server.networks['public'][0]
         expected_az = getattr(return_server, 'OS-EXT-AZ:availability_zone')
@@ -638,7 +638,7 @@ class InstancesTest(common.HeatTestCase):
                 return_server)
         self.m.ReplayAll()
         scheduler.TaskRunner(instance.create)()
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
         self.m.VerifyAll()
 
     def test_instance_validate(self):
@@ -671,7 +671,7 @@ class InstancesTest(common.HeatTestCase):
         instance.status = vm_status
 
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         d1 = {'server': self.fc.client.get_servers_detail()[1]['servers'][0]}
         d1['server']['status'] = vm_status
@@ -706,7 +706,7 @@ class InstancesTest(common.HeatTestCase):
         instance.resource_id = '1234'
 
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         self.m.StubOutWithMock(self.fc.client, 'delete_servers_1234')
         self.fc.client.delete_servers_1234().AndRaise(

heat/tests/aws/test_instance_network.py

@@ -168,7 +168,7 @@ class instancesTest(common.HeatTestCase):
         instance.resource_id = '1234'
         instance.status = vm_status
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         expected_ip = return_server.networks['public'][0]
         self.assertEqual(expected_ip, instance.FnGetAtt('PublicIp'))
@@ -324,7 +324,7 @@ class instancesTest(common.HeatTestCase):
             return_server, 'in_create_wnic')
 
         # this makes sure the auto increment worked on instance creation
-        self.assertTrue(instance.id > 0)
+        self.assertGreater(instance.id, 0)
 
         expected_ip = return_server.networks['public'][0]
         self.assertEqual(expected_ip, instance.FnGetAtt('PublicIp'))

heat/tests/clients/test_clients.py

@@ -365,8 +365,8 @@ class TestClientPluginsInitialise(common.HeatTestCase):
             self.assertEqual({}, plugin._client_instances)
             self.assertTrue(clients.has_client(plugin_name))
             self.assertIsInstance(plugin.service_types, list)
-            self.assertTrue(len(plugin.service_types) >= 1,
-                            'service_types is not defined for plugin')
+            self.assertGreaterEqual(len(plugin.service_types), 1,
+                                    'service_types is not defined for plugin')
 
     @mock.patch.object(client_plugin.ClientPlugin, 'invalidate')
     def test_invalidate_all_clients(self, mock_invalidate):

heat/tests/clients/test_swift_client.py

@@ -82,7 +82,7 @@ class SwiftUtilsTest(SwiftClientPluginTestCase):
         self.assertThat(url, matchers.MatchesRegex(regexp))
 
         timeout = int(url.split('=')[-1])
-        self.assertTrue(timeout < swift.MAX_EPOCH)
+        self.assertLess(timeout, swift.MAX_EPOCH)
 
     def test_get_temp_url_no_account_key(self):
         self.swift_client.url = ("http://fake-host.com:8080/v1/"

heat/tests/constraints/test_heat_constraints.py

@@ -61,8 +61,8 @@ class ResourceTypeConstraintTest(common.HeatTestCase):
 
         # Verify
         self.assertFalse(result)
-        self.assertTrue('OS::Heat::None,OS::Heat::RandomString'
-                        in self.constraint._error_message)
+        self.assertIn('OS::Heat::None,OS::Heat::RandomString',
+                      self.constraint._error_message)
         self.mock_env.get_class.assert_has_calls([mock.call(value[0]),
                                                   mock.call(value[1])])
 

heat/tests/engine/test_dependencies.py

@@ -183,7 +183,7 @@ class dependenciesTest(common.HeatTestCase):
         for n in ('last', 'middle'):
             self.assertIn(n, order,
                           "'%s' not found in dependency order" % n)
-        self.assertTrue(order.index('last') > order.index('middle'))
+        self.assertGreater(order.index('last'), order.index('middle'))
 
     def test_simple_multilevel_partial(self):
         d = dependencies.Dependencies([('last', 'middle'),

heat/tests/engine/test_scheduler.py

@@ -1283,8 +1283,8 @@ class TimeoutTest(common.HeatTestCase):
         eventlet.sleep(0.01)
         later = scheduler.Timeout(task, 10)
 
-        self.assertTrue(earlier < later)
-        self.assertTrue(later > earlier)
+        self.assertLess(earlier, later)
+        self.assertGreater(later, earlier)
         self.assertEqual(earlier, earlier)
         self.assertNotEqual(earlier, later)
 

heat/tests/openstack/cinder/test_volume.py

@@ -1019,7 +1019,7 @@ class CinderVolumeTest(vt_base.BaseVolumeTest):
         self.patchobject(rsrc, '_store_config_default_properties')
         scheduler.TaskRunner(rsrc.create)()
         # this makes sure the auto increment worked on volume creation
-        self.assertTrue(rsrc.id > 0)
+        self.assertGreater(rsrc.id, 0)
 
         self.m.VerifyAll()
 

heat/tests/openstack/heat/test_instance_group_update_policy.py

@@ -181,7 +181,8 @@ class InstanceGroupTest(common.HeatTestCase):
         self.assertEqual(1, len(grp.update_policy))
         self.assertIn('RollingUpdate', grp.update_policy)
         policy = grp.update_policy['RollingUpdate']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(1, int(policy['MinInstancesInService']))
         self.assertEqual(2, int(policy['MaxBatchSize']))
         self.assertEqual('PT1S', policy['PauseTime'])
@@ -196,7 +197,8 @@ class InstanceGroupTest(common.HeatTestCase):
         self.assertEqual(1, len(grp.update_policy))
         self.assertIn('RollingUpdate', grp.update_policy)
         policy = grp.update_policy['RollingUpdate']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(0, int(policy['MinInstancesInService']))
         self.assertEqual(1, int(policy['MaxBatchSize']))
         self.assertEqual('PT0S', policy['PauseTime'])

heat/tests/openstack/heat/test_random_string.py

@@ -92,7 +92,7 @@ Resources:
         return stack
 
     def assert_min(self, pattern, string, minimum):
-        self.assertTrue(len(re.findall(pattern, string)) >= minimum)
+        self.assertGreaterEqual(len(re.findall(pattern, string)), minimum)
 
     def test_random_string(self):
         stack = self.create_stack(self.template_random_string)

heat/tests/openstack/heat/test_resource_group.py

@@ -992,7 +992,8 @@ class RollingUpdatePolicyTest(common.HeatTestCase):
         self.assertEqual(2, len(grp.update_policy))
         self.assertIn('rolling_update', grp.update_policy)
         policy = grp.update_policy['rolling_update']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(1, int(policy['min_in_service']))
         self.assertEqual(tmpl_batch_sz, int(policy['max_batch_size']))
         self.assertEqual(1, policy['pause_time'])
@@ -1006,7 +1007,8 @@ class RollingUpdatePolicyTest(common.HeatTestCase):
         self.assertEqual(2, len(grp.update_policy))
         self.assertIn('rolling_update', grp.update_policy)
         policy = grp.update_policy['rolling_update']
-        self.assertTrue(policy and len(policy) > 0)
+        self.assertIsNotNone(policy)
+        self.assertGreater(len(policy), 0)
         self.assertEqual(0, int(policy['min_in_service']))
         self.assertEqual(1, int(policy['max_batch_size']))
         self.assertEqual(0, policy['pause_time'])

heat/tests/openstack/nova/test_server.py

@@ -394,7 +394,7 @@ class ServersTest(common.HeatTestCase):
         server = self._create_test_server(return_server, server_name)
 
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
         interfaces = [
             self._create_fake_iface('1234', 'fa:16:3e:8c:22:aa', '4.5.6.7'),
@@ -1066,7 +1066,7 @@ class ServersTest(common.HeatTestCase):
         _, kwargs = mock_create.call_args
         self.assertEqual(kwargs['scheduler_hints'], scheduler_hints)
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
     def test_check_maximum(self):
         msg = 'test_check_maximum'
@@ -1451,7 +1451,7 @@ class ServersTest(common.HeatTestCase):
         server.resource_id = '1234'
 
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
         side_effect = [server, fakes_nova.fake_exception()]
         self.patchobject(self.fc.servers, 'get', side_effect=side_effect)
@@ -1465,7 +1465,7 @@ class ServersTest(common.HeatTestCase):
         server.resource_id = '1234'
 
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
         self.patchobject(self.fc.client, 'delete_servers_1234',
                          side_effect=fakes_nova.fake_exception())
@@ -1479,7 +1479,7 @@ class ServersTest(common.HeatTestCase):
         server.resource_id = '1234'
 
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
         def make_error(*args):
             return_server.status = "ERROR"
@@ -1525,7 +1525,7 @@ class ServersTest(common.HeatTestCase):
         server.resource_id = '1234'
 
         # this makes sure the auto increment worked on server creation
-        self.assertTrue(server.id > 0)
+        self.assertGreater(server.id, 0)
 
         def make_soft_delete(*args):
             return_server.status = "SOFT_DELETED"

heat/tests/openstack/nova/test_server_group.py

@@ -73,7 +73,7 @@ class NovaServerGroupTest(common.HeatTestCase):
             n = name
 
             def fake_create(name, policies):
-                self.assertTrue(len(name) > 1)
+                self.assertGreater(len(name), 1)
                 return FakeGroup(n)
             self.sg_mgr.create = fake_create
         scheduler.TaskRunner(self.sg.create)()

heat/tests/openstack/swift/test_container.py

@@ -153,7 +153,7 @@ class SwiftTest(common.HeatTestCase):
 
         # Verify Expected Calls
         mock_put.assert_called_once_with(container_name, {})
-        self.assertTrue(mock_head.call_count > 0)
+        self.assertGreater(mock_head.call_count, 0)
 
     @mock.patch('swiftclient.client.Connection.put_container')
     def test_public_read(self, mock_put):

heat/tests/test_engine_service.py

@@ -122,7 +122,7 @@ class StackCreateTest(common.HeatTestCase):
         stack.create()
 
         self.assertIsNotNone(stack['WebServer'])
-        self.assertTrue(int(stack['WebServer'].resource_id) > 0)
+        self.assertGreater(int(stack['WebServer'].resource_id), 0)
         self.assertNotEqual(stack['WebServer'].ipaddress, '0.0.0.0')
 
     def test_wordpress_single_instance_stack_adopt(self):
@@ -188,7 +188,7 @@ class StackCreateTest(common.HeatTestCase):
         self.assertIsNotNone(db_s)
 
         self.assertIsNotNone(stack['WebServer'])
-        self.assertTrue(int(stack['WebServer'].resource_id) > 0)
+        self.assertGreater(int(stack['WebServer'].resource_id), 0)
 
         self.patchobject(fc.servers, 'delete',
                          side_effect=fakes_nova.fake_exception())

heat/tests/test_lifecycle_plugin_utils.py

@@ -56,7 +56,7 @@ class LifecyclePluginUtilsTest(common.HeatTestCase):
         self.assertIsNotNone(pp_cinstances)
         self.assertTrue(self.is_iterable(pp_cinstances),
                         "not iterable: %s" % pp_cinstances)
-        self.assertTrue(len(pp_cinstances) == 1)
+        self.assertEqual(1, len(pp_cinstances))
         self.assertEqual(TestLifecycleCallout1, pp_cinstances[0].__class__)
 
     def test_do_pre_and_post_callouts(self):

heat/tests/test_metadata_refresh.py

@@ -284,7 +284,7 @@ class WaitConditionMetadataUpdateTest(common.HeatTestCase):
             jsonutils.loads(inst.metadata_get(refresh=True)['test']))
 
         # Verify outgoing calls
-        self.assertTrue(mock_available.call_count > 0)
+        self.assertGreater(mock_available.call_count, 0)
         self.assertEqual(2, mock_handle.call_count)
         self.assertEqual(2, mock_check.call_count)
 

heat/tests/test_resource.py

@@ -4229,7 +4229,7 @@ class TestResourceMapping(common.HeatTestCase):
             type_elements = r_type.split('::')
             # type has fixed format
             # Platform type::Service/Type::Optional Sub-sections::Name
-            self.assertTrue(len(type_elements) >= 3)
+            self.assertGreaterEqual(len(type_elements), 3)
             # type should be OS or AWS
             self.assertIn(type_elements[0], ('AWS', 'OS'))
             # check that value is a class object
@@ -4257,4 +4257,4 @@ class TestResourceMapping(common.HeatTestCase):
         # that there is no regressions
         # It's soft check and should not be a cause of the merge conflict
         # Feel free to update it in some separate patch
-        self.assertTrue(num_of_types >= 137)
+        self.assertGreaterEqual(num_of_types, 137)

heat/tests/test_template_format.py

@@ -47,9 +47,10 @@ class JsonToYamlTest(common.HeatTestCase):
             if template_test_count >= self.expected_test_count:
                 break
 
-        self.assertTrue(template_test_count >= self.expected_test_count,
-                        'Expected at least %d templates to be tested, not %d' %
-                        (self.expected_test_count, template_test_count))
+        self.assertGreaterEqual(
+            template_test_count, self.expected_test_count,
+            'Expected at least %d templates to be tested, not %d' %
+            (self.expected_test_count, template_test_count))
 
     def compare_json_vs_yaml(self, json_str, yml_str):
         yml = template_format.parse(yml_str)
@@ -103,7 +104,7 @@ class YamlMinimalTest(common.HeatTestCase):
             config.cfg.CONF.max_template_size / 3)
         limit = config.cfg.CONF.max_template_size
         long_yaml = yaml.safe_dump(template)
-        self.assertTrue(len(long_yaml) > limit)
+        self.assertGreater(len(long_yaml), limit)
         ex = self.assertRaises(exception.RequestLimitExceeded,
                                template_format.parse, long_yaml)
         msg = ('Request limit exceeded: Template size (%(actual_len)s '

heat/tests/test_watch.py

@@ -512,7 +512,7 @@ class WatchRuleTest(common.HeatTestCase):
         actions = wr.evaluate()
         self.assertEqual('ALARM', wr.state)
         self.assertEqual(['DummyAction'], actions)
-        self.assertTrue(mock_get_resource.call_count > 0)
+        self.assertGreater(mock_get_resource.call_count, 0)
 
     @mock.patch('heat.engine.stack.Stack.resource_by_refid')
     def test_rule_actions_alarm_two_actions(self, mock_get_resource):
@@ -542,7 +542,7 @@ class WatchRuleTest(common.HeatTestCase):
         actions = wr.evaluate()
         self.assertEqual('ALARM', wr.state)
         self.assertEqual(['DummyAction', 'DummyAction'], actions)
-        self.assertTrue(mock_get_resource.call_count > 0)
+        self.assertGreater(mock_get_resource.call_count, 0)
 
     @mock.patch('heat.engine.stack.Stack.resource_by_refid')
     def test_rule_actions_ok_alarm(self, mock_get_resource):
@@ -583,7 +583,7 @@ class WatchRuleTest(common.HeatTestCase):
         actions = wr.evaluate()
         self.assertEqual('NORMAL', wr.state)
         self.assertEqual(['DummyAction'], actions)
-        self.assertTrue(mock_get_resource.call_count > 0)
+        self.assertGreater(mock_get_resource.call_count, 0)
 
     @mock.patch('heat.engine.stack.Stack.resource_by_refid')
     def test_rule_actions_nodata(self, mock_get_resource):
@@ -622,7 +622,7 @@ class WatchRuleTest(common.HeatTestCase):
         actions = wr.evaluate()
         self.assertEqual('NODATA', wr.state)
         self.assertEqual(['DummyAction'], actions)
-        self.assertTrue(mock_get_resource.call_count > 0)
+        self.assertGreater(mock_get_resource.call_count, 0)
 
     @mock.patch('heat.engine.stack.Stack.resource_by_refid')
     def test_to_ceilometer(self, mock_get_resource):
@@ -951,7 +951,7 @@ class WatchRuleTest(common.HeatTestCase):
 
         actions = wr.set_watch_state(watchrule.WatchRule.ALARM)
         self.assertEqual(['DummyAction'], actions)
-        self.assertTrue(mock_get_resource.call_count > 0)
+        self.assertGreater(mock_get_resource.call_count, 0)
 
     def test_set_watch_state_invalid(self):
         # Setup

heat_integrationtests/functional/test_resource_chain.py

@@ -58,7 +58,7 @@ class ResourceChainTests(functional_base.FunctionalTestsBase):
 
         # Verify
         stack = self.client.stacks.get(stack_id)
-        self.assertTrue(stack is not None)
+        self.assertIsNotNone(stack)
 
         # Top-level resource for chain
         expected = {'my-chain': 'OS::Heat::ResourceChain'}
@@ -74,15 +74,15 @@ class ResourceChainTests(functional_base.FunctionalTestsBase):
 
         # Outputs
         resource_ids = self._stack_output(stack, 'resource-ids')
-        self.assertTrue(resource_ids is not None)
+        self.assertIsNotNone(resource_ids)
         self.assertEqual(2, len(resource_ids))
 
         resource_value = self._stack_output(stack, 'resource-0-value')
-        self.assertTrue(resource_value is not None)
+        self.assertIsNotNone(resource_value)
         self.assertEqual(8, len(resource_value))  # from parameter
 
         resource_attrs = self._stack_output(stack, 'all-resource-attrs')
-        self.assertTrue(resource_attrs is not None)
+        self.assertIsNotNone(resource_attrs)
         self.assertIsInstance(resource_attrs, dict)
         self.assertEqual(2, len(resource_attrs))
         self.assertEqual(8, len(resource_attrs['0']))

heat_integrationtests/functional/test_stack_events.py

@@ -74,7 +74,7 @@ outputs:
                 stack_event.resource_name)
 
             # Resource events are a subset of the original stack event list
-            self.assertTrue(len(resource_events) < len(stack_events))
+            self.assertLess(len(resource_events), len(stack_events))
 
             # Get the event details for each resource event
             for resource_event in resource_events:

heat_integrationtests/scenario/test_server_software_config.py

@@ -100,7 +100,7 @@ class SoftwareConfigIntegrationTest(scenario_base.ScenarioTestsBase):
             res1['result'])
         self.assertEqual(0, res1['status_code'])
         self.assertEqual('Output to stderr\n', res1['stderr'])
-        self.assertTrue(len(res1['stdout']) > 0)
+        self.assertGreater(len(res1['stdout']), 0)
 
         res2 = self._stack_output(stack, 'res2')
         self.assertEqual(
@@ -118,7 +118,7 @@ class SoftwareConfigIntegrationTest(scenario_base.ScenarioTestsBase):
             res3['result'])
         self.assertEqual(0, res3['status_code'])
         self.assertEqual('', res3['stderr'])
-        self.assertTrue(len(res1['stdout']) > 0)
+        self.assertGreater(len(res1['stdout']), 0)
 
         dep1_resource = self.client.resources.get(sid, 'dep1')
         dep1_id = dep1_resource.physical_resource_id