tempest/tempest/test.py

860 lines
34 KiB
Python

# Copyright 2012 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import atexit
import functools
import os
import re
import sys
import time
import urllib
import uuid
import fixtures
from oslo_log import log as logging
from oslo_serialization import jsonutils as json
from oslo_utils import importutils
import six
import testscenarios
import testtools
from tempest import clients
from tempest.common import cred_client
from tempest.common import credentials
from tempest.common import fixed_network
import tempest.common.generator.valid_generator as valid
import tempest.common.validation_resources as vresources
from tempest import config
from tempest import exceptions
LOG = logging.getLogger(__name__)
CONF = config.CONF
def attr(**kwargs):
"""A decorator which applies the testtools attr decorator
This decorator applies the testtools.testcase.attr if it is in the list of
attributes to testtools we want to apply.
"""
def decorator(f):
if 'type' in kwargs and isinstance(kwargs['type'], str):
f = testtools.testcase.attr(kwargs['type'])(f)
elif 'type' in kwargs and isinstance(kwargs['type'], list):
for attr in kwargs['type']:
f = testtools.testcase.attr(attr)(f)
return f
return decorator
def idempotent_id(id):
"""Stub for metadata decorator"""
if not isinstance(id, six.string_types):
raise TypeError('Test idempotent_id must be string not %s'
'' % type(id).__name__)
uuid.UUID(id)
def decorator(f):
f = testtools.testcase.attr('id-%s' % id)(f)
if f.__doc__:
f.__doc__ = 'Test idempotent id: %s\n%s' % (id, f.__doc__)
else:
f.__doc__ = 'Test idempotent id: %s' % id
return f
return decorator
def get_service_list():
service_list = {
'compute': CONF.service_available.nova,
'image': CONF.service_available.glance,
'baremetal': CONF.service_available.ironic,
'volume': CONF.service_available.cinder,
'orchestration': CONF.service_available.heat,
# NOTE(mtreinish) nova-network will provide networking functionality
# if neutron isn't available, so always set to True.
'network': True,
'identity': True,
'object_storage': CONF.service_available.swift,
'dashboard': CONF.service_available.horizon,
'telemetry': CONF.service_available.ceilometer,
'data_processing': CONF.service_available.sahara,
'database': CONF.service_available.trove
}
return service_list
def services(*args):
"""A decorator used to set an attr for each service used in a test case
This decorator applies a testtools attr for each service that gets
exercised by a test case.
"""
def decorator(f):
services = ['compute', 'image', 'baremetal', 'volume', 'orchestration',
'network', 'identity', 'object_storage', 'dashboard',
'telemetry', 'data_processing', 'database']
for service in args:
if service not in services:
raise exceptions.InvalidServiceTag('%s is not a valid '
'service' % service)
attr(type=list(args))(f)
@functools.wraps(f)
def wrapper(self, *func_args, **func_kwargs):
service_list = get_service_list()
for service in args:
if not service_list[service]:
msg = 'Skipped because the %s service is not available' % (
service)
raise testtools.TestCase.skipException(msg)
return f(self, *func_args, **func_kwargs)
return wrapper
return decorator
def stresstest(**kwargs):
"""Add stress test decorator
For all functions with this decorator a attr stress will be
set automatically.
@param class_setup_per: allowed values are application, process, action
``application``: once in the stress job lifetime
``process``: once in the worker process lifetime
``action``: on each action
@param allow_inheritance: allows inheritance of this attribute
"""
def decorator(f):
if 'class_setup_per' in kwargs:
setattr(f, "st_class_setup_per", kwargs['class_setup_per'])
else:
setattr(f, "st_class_setup_per", 'process')
if 'allow_inheritance' in kwargs:
setattr(f, "st_allow_inheritance", kwargs['allow_inheritance'])
else:
setattr(f, "st_allow_inheritance", False)
attr(type='stress')(f)
return f
return decorator
def requires_ext(**kwargs):
"""A decorator to skip tests if an extension is not enabled
@param extension
@param service
"""
def decorator(func):
@functools.wraps(func)
def wrapper(*func_args, **func_kwargs):
if not is_extension_enabled(kwargs['extension'],
kwargs['service']):
msg = "Skipped because %s extension: %s is not enabled" % (
kwargs['service'], kwargs['extension'])
raise testtools.TestCase.skipException(msg)
return func(*func_args, **func_kwargs)
return wrapper
return decorator
def is_extension_enabled(extension_name, service):
"""A function that will check the list of enabled extensions from config
"""
config_dict = {
'compute': CONF.compute_feature_enabled.api_extensions,
'volume': CONF.volume_feature_enabled.api_extensions,
'network': CONF.network_feature_enabled.api_extensions,
'object': CONF.object_storage_feature_enabled.discoverable_apis,
'identity': CONF.identity_feature_enabled.api_extensions
}
if len(config_dict[service]) == 0:
return False
if config_dict[service][0] == 'all':
return True
if extension_name in config_dict[service]:
return True
return False
at_exit_set = set()
def validate_tearDownClass():
if at_exit_set:
LOG.error(
"tearDownClass does not call the super's "
"tearDownClass in these classes: \n"
+ str(at_exit_set))
atexit.register(validate_tearDownClass)
class BaseTestCase(testtools.testcase.WithAttributes,
testtools.TestCase):
"""The test base class defines Tempest framework for class level fixtures.
`setUpClass` and `tearDownClass` are defined here and cannot be overwritten
by subclasses (enforced via hacking rule T105).
Set-up is split in a series of steps (setup stages), which can be
overwritten by test classes. Set-up stages are:
- skip_checks
- setup_credentials
- setup_clients
- resource_setup
Tear-down is also split in a series of steps (teardown stages), which are
stacked for execution only if the corresponding setup stage had been
reached during the setup phase. Tear-down stages are:
- clear_credentials (defined in the base test class)
- resource_cleanup
"""
setUpClassCalled = False
_service = None
# NOTE(andreaf) credentials holds a list of the credentials to be allocated
# at class setup time. Credential types can be 'primary', 'alt', 'admin' or
# a list of roles - the first element of the list being a label, and the
# rest the actual roles
credentials = []
# Resources required to validate a server using ssh
validation_resources = {}
network_resources = {}
# NOTE(sdague): log_format is defined inline here instead of using the oslo
# default because going through the config path recouples config to the
# stress tests too early, and depending on testr order will fail unit tests
log_format = ('%(asctime)s %(process)d %(levelname)-8s '
'[%(name)s] %(message)s')
@classmethod
def setUpClass(cls):
# It should never be overridden by descendants
if hasattr(super(BaseTestCase, cls), 'setUpClass'):
super(BaseTestCase, cls).setUpClass()
cls.setUpClassCalled = True
# Stack of (name, callable) to be invoked in reverse order at teardown
cls.teardowns = []
# All the configuration checks that may generate a skip
cls.skip_checks()
try:
# Allocation of all required credentials and client managers
cls.teardowns.append(('credentials', cls.clear_credentials))
cls.setup_credentials()
# Shortcuts to clients
cls.setup_clients()
# Additional class-wide test resources
cls.teardowns.append(('resources', cls.resource_cleanup))
cls.resource_setup()
except Exception:
etype, value, trace = sys.exc_info()
LOG.info("%s raised in %s.setUpClass. Invoking tearDownClass." % (
etype, cls.__name__))
cls.tearDownClass()
try:
six.reraise(etype, value, trace)
finally:
del trace # to avoid circular refs
@classmethod
def tearDownClass(cls):
at_exit_set.discard(cls)
# It should never be overridden by descendants
if hasattr(super(BaseTestCase, cls), 'tearDownClass'):
super(BaseTestCase, cls).tearDownClass()
# Save any existing exception, we always want to re-raise the original
# exception only
etype, value, trace = sys.exc_info()
# If there was no exception during setup we shall re-raise the first
# exception in teardown
re_raise = (etype is None)
while cls.teardowns:
name, teardown = cls.teardowns.pop()
# Catch any exception in tearDown so we can re-raise the original
# exception at the end
try:
teardown()
except Exception as te:
sys_exec_info = sys.exc_info()
tetype = sys_exec_info[0]
# TODO(andreaf): Till we have the ability to cleanup only
# resources that were successfully setup in resource_cleanup,
# log AttributeError as info instead of exception.
if tetype is AttributeError and name == 'resources':
LOG.info("tearDownClass of %s failed: %s" % (name, te))
else:
LOG.exception("teardown of %s failed: %s" % (name, te))
if not etype:
etype, value, trace = sys_exec_info
# If exceptions were raised during teardown, an not before, re-raise
# the first one
if re_raise and etype is not None:
try:
six.reraise(etype, value, trace)
finally:
del trace # to avoid circular refs
@classmethod
def skip_checks(cls):
"""Class level skip checks. Subclasses verify in here all
conditions that might prevent the execution of the entire test class.
Checks implemented here may not make use API calls, and should rely on
configuration alone.
In general skip checks that require an API call are discouraged.
If one is really needed it may be implemented either in the
resource_setup or at test level.
"""
identity_version = cls.get_identity_version()
if 'admin' in cls.credentials and not credentials.is_admin_available(
identity_version=identity_version):
msg = "Missing Identity Admin API credentials in configuration."
raise cls.skipException(msg)
if 'alt' in cls.credentials and not credentials.is_alt_available(
identity_version=identity_version):
msg = "Missing a 2nd set of API credentials in configuration."
raise cls.skipException(msg)
if hasattr(cls, 'identity_version'):
if cls.identity_version == 'v2':
if not CONF.identity_feature_enabled.api_v2:
raise cls.skipException("Identity api v2 is not enabled")
elif cls.identity_version == 'v3':
if not CONF.identity_feature_enabled.api_v3:
raise cls.skipException("Identity api v3 is not enabled")
@classmethod
def setup_credentials(cls):
"""Allocate credentials and the client managers from them.
A test class that requires network resources must override
setup_credentials and defined the required resources before super
is invoked.
"""
for credentials_type in cls.credentials:
# This may raise an exception in case credentials are not available
# In that case we want to let the exception through and the test
# fail accordingly
if isinstance(credentials_type, six.string_types):
manager = cls.get_client_manager(
credential_type=credentials_type)
setattr(cls, 'os_%s' % credentials_type, manager)
# Setup some common aliases
# TODO(andreaf) The aliases below are a temporary hack
# to avoid changing too much code in one patch. They should
# be removed eventually
if credentials_type == 'primary':
cls.os = cls.manager = cls.os_primary
if credentials_type == 'admin':
cls.os_adm = cls.admin_manager = cls.os_admin
if credentials_type == 'alt':
cls.alt_manager = cls.os_alt
elif isinstance(credentials_type, list):
manager = cls.get_client_manager(roles=credentials_type[1:],
force_new=True)
setattr(cls, 'os_roles_%s' % credentials_type[0], manager)
@classmethod
def setup_clients(cls):
"""Create links to the clients into the test object."""
# TODO(andreaf) There is a fair amount of code that could me moved from
# base / test classes in here. Ideally tests should be able to only
# specify which client is `client` and nothing else.
pass
@classmethod
def resource_setup(cls):
"""Class level resource setup for test cases.
"""
if hasattr(cls, "os"):
cls.validation_resources = vresources.create_validation_resources(
cls.os, cls.validation_resources)
else:
LOG.warn("Client manager not found, validation resources not"
" created")
@classmethod
def resource_cleanup(cls):
"""Class level resource cleanup for test cases.
Resource cleanup must be able to handle the case of partially setup
resources, in case a failure during `resource_setup` should happen.
"""
if cls.validation_resources:
if hasattr(cls, "os"):
vresources.clear_validation_resources(cls.os,
cls.validation_resources)
cls.validation_resources = {}
else:
LOG.warn("Client manager not found, validation resources not"
" deleted")
def setUp(self):
super(BaseTestCase, self).setUp()
if not self.setUpClassCalled:
raise RuntimeError("setUpClass does not calls the super's"
"setUpClass in the "
+ self.__class__.__name__)
at_exit_set.add(self.__class__)
test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
try:
test_timeout = int(test_timeout)
except ValueError:
test_timeout = 0
if test_timeout > 0:
self.useFixture(fixtures.Timeout(test_timeout, gentle=True))
if (os.environ.get('OS_STDOUT_CAPTURE') == 'True' or
os.environ.get('OS_STDOUT_CAPTURE') == '1'):
stdout = self.useFixture(fixtures.StringStream('stdout')).stream
self.useFixture(fixtures.MonkeyPatch('sys.stdout', stdout))
if (os.environ.get('OS_STDERR_CAPTURE') == 'True' or
os.environ.get('OS_STDERR_CAPTURE') == '1'):
stderr = self.useFixture(fixtures.StringStream('stderr')).stream
self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
if (os.environ.get('OS_LOG_CAPTURE') != 'False' and
os.environ.get('OS_LOG_CAPTURE') != '0'):
self.useFixture(fixtures.LoggerFixture(nuke_handlers=False,
format=self.log_format,
level=None))
@property
def credentials_provider(self):
return self._get_credentials_provider()
@property
def identity_utils(self):
"""A client that abstracts v2 and v3 identity operations.
This can be used for creating and tearing down projects in tests. It
should not be used for testing identity features.
"""
if CONF.identity.auth_version == 'v2':
client = self.os_admin.identity_client
else:
client = self.os_admin.identity_v3_client
try:
domain = client.auth_provider.credentials.project_domain_name
except AttributeError:
domain = 'Default'
return cred_client.get_creds_client(client, domain)
@classmethod
def get_identity_version(cls):
"""Returns the identity version used by the test class"""
identity_version = getattr(cls, 'identity_version', None)
return identity_version or CONF.identity.auth_version
@classmethod
def _get_credentials_provider(cls):
"""Returns a credentials provider
If no credential provider exists yet creates one.
It uses self.identity_version if defined, or the configuration value
"""
if (not hasattr(cls, '_creds_provider') or not cls._creds_provider or
not cls._creds_provider.name == cls.__name__):
force_tenant_isolation = getattr(cls, 'force_tenant_isolation',
False)
cls._creds_provider = credentials.get_credentials_provider(
name=cls.__name__, network_resources=cls.network_resources,
force_tenant_isolation=force_tenant_isolation,
identity_version=cls.get_identity_version())
return cls._creds_provider
@classmethod
def get_client_manager(cls, credential_type=None, roles=None,
force_new=None):
"""Returns an OpenStack client manager
Returns an OpenStack client manager based on either credential_type
or a list of roles. If neither is specified, it defaults to
credential_type 'primary'
:param credential_type: string - primary, alt or admin
:param roles: list of roles
:returns the created client manager
:raises skipException: if the requested credentials are not available
"""
if all([roles, credential_type]):
msg = "Cannot get credentials by type and roles at the same time"
raise ValueError(msg)
if not any([roles, credential_type]):
credential_type = 'primary'
cred_provider = cls._get_credentials_provider()
if roles:
for role in roles:
if not cred_provider.is_role_available(role):
skip_msg = (
"%s skipped because the configured credential provider"
" is not able to provide credentials with the %s role "
"assigned." % (cls.__name__, role))
raise cls.skipException(skip_msg)
params = dict(roles=roles)
if force_new is not None:
params.update(force_new=force_new)
creds = cred_provider.get_creds_by_roles(**params)
else:
credentials_method = 'get_%s_creds' % credential_type
if hasattr(cred_provider, credentials_method):
creds = getattr(cred_provider, credentials_method)()
else:
raise exceptions.InvalidCredentials(
"Invalid credentials type %s" % credential_type)
return clients.Manager(credentials=creds, service=cls._service)
@classmethod
def clear_credentials(cls):
"""
Clears creds if set
"""
if hasattr(cls, '_creds_provider'):
cls._creds_provider.clear_creds()
@classmethod
def set_validation_resources(cls, keypair=None, floating_ip=None,
security_group=None,
security_group_rules=None):
"""Specify which ssh server validation resources should be created.
Each of the argument must be set to either None, True or False, with
None - use default from config (security groups and security group
rules get created when set to None)
False - Do not create the validation resource
True - create the validation resource
@param keypair
@param security_group
@param security_group_rules
@param floating_ip
"""
if not CONF.validation.run_validation:
return
if keypair is None:
if CONF.validation.auth_method.lower() == "keypair":
keypair = True
else:
keypair = False
if floating_ip is None:
if CONF.validation.connect_method.lower() == "floating":
floating_ip = True
else:
floating_ip = False
if security_group is None:
security_group = CONF.validation.security_group
if security_group_rules is None:
security_group_rules = CONF.validation.security_group_rules
if not cls.validation_resources:
cls.validation_resources = {
'keypair': keypair,
'security_group': security_group,
'security_group_rules': security_group_rules,
'floating_ip': floating_ip}
@classmethod
def set_network_resources(cls, network=False, router=False, subnet=False,
dhcp=False):
"""Specify which network resources should be created
@param network
@param router
@param subnet
@param dhcp
"""
# network resources should be set only once from callers
# in order to ensure that even if it's called multiple times in
# a chain of overloaded methods, the attribute is set only
# in the leaf class
if not cls.network_resources:
cls.network_resources = {
'network': network,
'router': router,
'subnet': subnet,
'dhcp': dhcp}
@classmethod
def get_tenant_network(cls):
"""Get the network to be used in testing
:return: network dict including 'id' and 'name'
"""
# Make sure cred_provider exists and get a network client
networks_client = cls.get_client_manager().compute_networks_client
cred_provider = cls._get_credentials_provider()
# In case of nova network, isolated tenants are not able to list the
# network configured in fixed_network_name, even if the can use it
# for their servers, so using an admin network client to validate
# the network name
if (not CONF.service_available.neutron and
credentials.is_admin_available(
identity_version=cls.get_identity_version())):
admin_creds = cred_provider.get_admin_creds()
admin_manager = clients.Manager(admin_creds)
networks_client = admin_manager.compute_networks_client
return fixed_network.get_tenant_network(cred_provider,
networks_client)
def assertEmpty(self, list, msg=None):
self.assertTrue(len(list) == 0, msg)
def assertNotEmpty(self, list, msg=None):
self.assertTrue(len(list) > 0, msg)
class NegativeAutoTest(BaseTestCase):
_resources = {}
@classmethod
def setUpClass(cls):
super(NegativeAutoTest, cls).setUpClass()
os = cls.get_client_manager(credential_type='primary')
cls.client = os.negative_client
@staticmethod
def load_tests(*args):
"""
Wrapper for testscenarios to set the mandatory scenarios variable
only in case a real test loader is in place. Will be automatically
called in case the variable "load_tests" is set.
"""
if getattr(args[0], 'suiteClass', None) is not None:
loader, standard_tests, pattern = args
else:
standard_tests, module, loader = args
for test in testtools.iterate_tests(standard_tests):
schema = getattr(test, '_schema', None)
if schema is not None:
setattr(test, 'scenarios',
NegativeAutoTest.generate_scenario(schema))
return testscenarios.load_tests_apply_scenarios(*args)
@staticmethod
def generate_scenario(description):
"""
Generates the test scenario list for a given description.
:param description: A file or dictionary with the following entries:
name (required) name for the api
http-method (required) one of HEAD,GET,PUT,POST,PATCH,DELETE
url (required) the url to be appended to the catalog url with '%s'
for each resource mentioned
resources: (optional) A list of resource names such as "server",
"flavor", etc. with an element for each '%s' in the url. This
method will call self.get_resource for each element when
constructing the positive test case template so negative
subclasses are expected to return valid resource ids when
appropriate.
json-schema (optional) A valid json schema that will be used to
create invalid data for the api calls. For "GET" and "HEAD",
the data is used to generate query strings appended to the url,
otherwise for the body of the http call.
"""
LOG.debug(description)
generator = importutils.import_class(
CONF.negative.test_generator)()
generator.validate_schema(description)
schema = description.get("json-schema", None)
resources = description.get("resources", [])
scenario_list = []
expected_result = None
for resource in resources:
if isinstance(resource, dict):
expected_result = resource['expected_result']
resource = resource['name']
LOG.debug("Add resource to test %s" % resource)
scn_name = "inv_res_%s" % (resource)
scenario_list.append((scn_name, {"resource": (resource,
str(uuid.uuid4())),
"expected_result": expected_result
}))
if schema is not None:
for scenario in generator.generate_scenarios(schema):
scenario_list.append((scenario['_negtest_name'],
scenario))
LOG.debug(scenario_list)
return scenario_list
def execute(self, description):
"""
Execute a http call on an api that are expected to
result in client errors. First it uses invalid resources that are part
of the url, and then invalid data for queries and http request bodies.
:param description: A json file or dictionary with the following
entries:
name (required) name for the api
http-method (required) one of HEAD,GET,PUT,POST,PATCH,DELETE
url (required) the url to be appended to the catalog url with '%s'
for each resource mentioned
resources: (optional) A list of resource names such as "server",
"flavor", etc. with an element for each '%s' in the url. This
method will call self.get_resource for each element when
constructing the positive test case template so negative
subclasses are expected to return valid resource ids when
appropriate.
json-schema (optional) A valid json schema that will be used to
create invalid data for the api calls. For "GET" and "HEAD",
the data is used to generate query strings appended to the url,
otherwise for the body of the http call.
"""
LOG.info("Executing %s" % description["name"])
LOG.debug(description)
generator = importutils.import_class(
CONF.negative.test_generator)()
schema = description.get("json-schema", None)
method = description["http-method"]
url = description["url"]
expected_result = None
if "default_result_code" in description:
expected_result = description["default_result_code"]
resources = [self.get_resource(r) for
r in description.get("resources", [])]
if hasattr(self, "resource"):
# Note(mkoderer): The resources list already contains an invalid
# entry (see get_resource).
# We just send a valid json-schema with it
valid_schema = None
if schema:
valid_schema = \
valid.ValidTestGenerator().generate_valid(schema)
new_url, body = self._http_arguments(valid_schema, url, method)
elif hasattr(self, "_negtest_name"):
schema_under_test = \
valid.ValidTestGenerator().generate_valid(schema)
local_expected_result = \
generator.generate_payload(self, schema_under_test)
if local_expected_result is not None:
expected_result = local_expected_result
new_url, body = \
self._http_arguments(schema_under_test, url, method)
else:
raise Exception("testscenarios are not active. Please make sure "
"that your test runner supports the load_tests "
"mechanism")
if "admin_client" in description and description["admin_client"]:
if not credentials.is_admin_available(
identity_version=self.get_identity_version()):
msg = ("Missing Identity Admin API credentials in"
"configuration.")
raise self.skipException(msg)
creds = self.credentials_provider.get_admin_creds()
os_adm = clients.Manager(credentials=creds)
client = os_adm.negative_client
else:
client = self.client
resp, resp_body = client.send_request(method, new_url,
resources, body=body)
self._check_negative_response(expected_result, resp.status, resp_body)
def _http_arguments(self, json_dict, url, method):
LOG.debug("dict: %s url: %s method: %s" % (json_dict, url, method))
if not json_dict:
return url, None
elif method in ["GET", "HEAD", "PUT", "DELETE"]:
return "%s?%s" % (url, urllib.urlencode(json_dict)), None
else:
return url, json.dumps(json_dict)
def _check_negative_response(self, expected_result, result, body):
self.assertTrue(result >= 400 and result < 500 and result != 413,
"Expected client error, got %s:%s" %
(result, body))
self.assertTrue(expected_result is None or expected_result == result,
"Expected %s, got %s:%s" %
(expected_result, result, body))
@classmethod
def set_resource(cls, name, resource):
"""
This function can be used in setUpClass context to register a resoruce
for a test.
:param name: The name of the kind of resource such as "flavor", "role",
etc.
:resource: The id of the resource
"""
cls._resources[name] = resource
def get_resource(self, name):
"""
Return a valid uuid for a type of resource. If a real resource is
needed as part of a url then this method should return one. Otherwise
it can return None.
:param name: The name of the kind of resource such as "flavor", "role",
etc.
"""
if isinstance(name, dict):
name = name['name']
if hasattr(self, "resource") and self.resource[0] == name:
LOG.debug("Return invalid resource (%s) value: %s" %
(self.resource[0], self.resource[1]))
return self.resource[1]
if name in self._resources:
return self._resources[name]
return None
def SimpleNegativeAutoTest(klass):
"""
This decorator registers a test function on basis of the class name.
"""
@attr(type=['negative'])
def generic_test(self):
if hasattr(self, '_schema'):
self.execute(self._schema)
cn = klass.__name__
cn = cn.replace('JSON', '')
cn = cn.replace('Test', '')
# NOTE(mkoderer): replaces uppercase chars inside the class name with '_'
lower_cn = re.sub('(?<!^)(?=[A-Z])', '_', cn).lower()
func_name = 'test_%s' % lower_cn
setattr(klass, func_name, generic_test)
return klass
def call_until_true(func, duration, sleep_for):
"""
Call the given function until it returns True (and return True) or
until the specified duration (in seconds) elapses (and return
False).
:param func: A zero argument callable that returns True on success.
:param duration: The number of seconds for which to attempt a
successful call of the function.
:param sleep_for: The number of seconds to sleep after an unsuccessful
invocation of the function.
"""
now = time.time()
timeout = now + duration
while now < timeout:
if func():
return True
time.sleep(sleep_for)
now = time.time()
return False