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# *****************************************************************************
#
# 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.
#
# See NOTICE file for details.
#
# *****************************************************************************
import multiprocessing as mp
import inspect
import os
import sys
import traceback
import queue
import unittest
import common
_modules = {} # type: ignore[var-annotated]
def _import(filename):
import importlib.util
module_name = os.path.basename(filename)[:-3]
dirname = os.path.dirname(filename)
if filename in _modules:
return _modules[filename]
spec = importlib.util.spec_from_file_location(
module_name, filename, submodule_search_locations=[dirname])
origin = importlib.util.module_from_spec(spec)
sys.modules[module_name] = origin
spec.loader.exec_module(origin)
_modules[filename] = origin
return origin
def _execute(inQueue, outQueue):
while True:
datum = inQueue.get()
if datum is None:
break
ex = None
ret = None
(func_name, func_file, args, kwargs) = datum
try:
module = _import(func_file)
func = getattr(module, func_name)
ret = func(*args, **kwargs)
except Exception as ex1:
traceback.print_exc()
ex = ex1
# This may fail if we get a Java exception so timeout is used
outQueue.put([ret, ex])
class Client(object):
def __init__(self):
self.start()
def start(self):
ctx = mp.get_context("spawn")
self.inQueue = ctx.Queue()
self.outQueue = ctx.Queue()
self.process = ctx.Process(target=_execute, args=(self.inQueue, self.outQueue), daemon=True)
self.process.start()
self.timeout = 20
def execute(self, function, *args, **kwargs):
self.inQueue.put([function.__name__, os.path.abspath(
inspect.getfile(function)), args, kwargs])
try:
(ret, ex) = self.outQueue.get(True, self.timeout)
except queue.Empty:
raise AssertionError("function {func} FAILED with args: {args} and kwargs: {kwargs}"
.format(func=function, args=args, kwargs=kwargs))
if ex is not None:
raise ex
return ret
def restart(self):
self.stop()
self.start()
def stop(self):
self.inQueue.put(None)
self.process.join()
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
self.stop()
return False
def TestCase(cls=None, **kwargs):
""" Decorator that makes tests run in a subprocess """
if cls:
return _prepare(cls)
def modify(cls):
return _prepare(cls, **kwargs)
return modify
def _hook(filename, clsname, funcname, *args):
module = _import(filename)
cls = getattr(module, clsname)
inst = '_instance_%s' % cls.__name__
if not inst in module.__dict__:
setattr(module, inst, cls())
inst = getattr(module, inst)
getattr(inst, funcname)(*args)
def _prepare(orig, individual=False):
clsname = orig.__name__
filename = os.path.abspath(inspect.getfile(orig))
class ProxyClass(orig):
def __init__(self, *args):
orig.__init__(self, *args)
@classmethod
def tearDownClass(cls):
ProxyClass._client.execute(
_hook, filename, clsname, '_tearDownClass')
ProxyClass._client.stop()
@classmethod
def setUpClass(cls):
ProxyClass._client = Client()
ProxyClass._client.execute(_hook, filename, clsname, '_setUpClass')
def setUp(self):
if common.fast:
raise unittest.SkipTest("fast")
if individual:
ProxyClass._client.restart()
ProxyClass._client.execute(_hook, filename, clsname, '_setUp')
if hasattr(self, "setUpLocals"):
ProxyClass._client.execute(
_hook, filename, clsname, '_set', self.setUpLocals())
def _set(self, dic):
for k, v in dic.items():
setattr(self, k, v)
def tearDown(self):
ProxyClass._client.execute(_hook, filename, clsname, '_tearDown')
class ProxyMethod(object):
def __init__(self, name):
self.name = name
self.__name__ = name
self.__qualname__ = "%s.%s" % (clsname, name)
def __call__(self):
ProxyClass._client.execute(_hook, filename, clsname, self.name)
for k, v in orig.__dict__.items():
if k.startswith("test"):
test = ProxyMethod("_" + k)
test.__name__ = k
type.__setattr__(ProxyClass, k, test)
type.__setattr__(ProxyClass, "_" + k, v)
type.__setattr__(ProxyClass, "_setUp", orig.setUp)
type.__setattr__(ProxyClass, "_setUpClass", orig.setUpClass)
type.__setattr__(ProxyClass, "_tearDown", orig.tearDown)
type.__setattr__(ProxyClass, "_tearDownClass", orig.tearDownClass)
return ProxyClass
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