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#
# Copyright (c) 2001 Steven Knight
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import unittest
import random
import math
import SCons.Job
import sys
# a large number
num_sines = 10000
# how many parallel jobs to perform for the test
num_jobs = 11
# how many tasks to perform for the test
num_tasks = num_jobs*5
class DummyLock:
"fake lock class to use if threads are not supported"
def acquire(self):
pass
def release(self):
pass
class NoThreadsException:
"raised by the ParallelTestCase if threads are not supported"
def __str__(self):
return "the interpreter doesn't support threads"
class Task:
"""A dummy task class for testing purposes."""
def __init__(self, i, taskmaster):
self.i = i
self.taskmaster = taskmaster
self.was_executed = 0
def execute(self):
self.taskmaster.guard.acquire()
self.taskmaster.begin_list.append(self.i)
self.taskmaster.guard.release()
# do something that will take some random amount of time:
for i in range(random.randrange(0, num_sines, 1)):
x = math.sin(i)
self.was_executed = 1
self.taskmaster.guard.acquire()
self.taskmaster.end_list.append(self.i)
self.taskmaster.guard.release()
class ExceptionTask:
"""A dummy task class for testing purposes."""
def __init__(self, i, taskmaster):
pass
def execute(self):
raise "exception"
class Taskmaster:
"""A dummy taskmaster class for testing the job classes."""
def __init__(self, n, test_case, Task):
"""n is the number of dummy tasks to perform."""
self.test_case = test_case
self.stop = None
self.num_tasks = n
self.num_iterated = 0
self.num_executed = 0
self.num_failed = 0
self.Task = Task
# 'guard' guards 'task_begin_list' and 'task_end_list'
try:
import threading
self.guard = threading.Lock()
except:
self.guard = DummyLock()
# keep track of the order tasks are begun in
self.begin_list = []
# keep track of the order tasks are completed in
self.end_list = []
def next_task(self):
if self.stop or self.all_tasks_are_iterated():
return None
else:
self.num_iterated = self.num_iterated + 1
return self.Task(self.num_iterated, self)
def all_tasks_are_executed(self):
return self.num_executed == self.num_tasks
def all_tasks_are_iterated(self):
return self.num_iterated == self.num_tasks
def executed(self, task):
self.num_executed = self.num_executed + 1
self.test_case.failUnless(task.was_executed,
"the task wasn't really executed")
self.test_case.failUnless(task.__class__ is Task,
"the task wasn't really a Task instance")
def failed(self, task):
self.num_failed = self.num_failed + 1
self.stop = 1
def is_blocked(self):
# simulate blocking tasks
return self.num_iterated - self.num_executed >= max(num_jobs/2, 2)
def tasks_were_serial(self):
"analyze the task order to see if they were serial"
serial = 1 # assume the tasks were serial
for i in range(num_tasks):
serial = serial and (self.begin_list[i]
== self.end_list[i]
== (i + 1))
return serial
class ParallelTestCase(unittest.TestCase):
def runTest(self):
"test parallel jobs"
try:
import threading
except:
raise NoThreadsException()
taskmaster = Taskmaster(num_tasks, self, Task)
jobs = SCons.Job.Jobs(num_jobs, taskmaster)
jobs.start()
jobs.wait()
self.failUnless(not taskmaster.tasks_were_serial(),
"the tasks were not executed in parallel")
self.failUnless(taskmaster.all_tasks_are_executed(),
"all the tests were not executed")
self.failUnless(taskmaster.all_tasks_are_iterated(),
"all the tests were not iterated over")
self.failIf(taskmaster.num_failed,
"some task(s) failed to execute")
class SerialTestCase(unittest.TestCase):
def runTest(self):
"test a serial job"
taskmaster = Taskmaster(num_tasks, self, Task)
jobs = SCons.Job.Jobs(1, taskmaster)
jobs.start()
jobs.wait()
self.failUnless(taskmaster.tasks_were_serial(),
"the tasks were not executed in series")
self.failUnless(taskmaster.all_tasks_are_executed(),
"all the tests were not executed")
self.failUnless(taskmaster.all_tasks_are_iterated(),
"all the tests were not iterated over")
self.failIf(taskmaster.num_failed,
"some task(s) failed to execute")
class SerialExceptionTestCase(unittest.TestCase):
def runTest(self):
"test a serial job with tasks that raise exceptions"
taskmaster = Taskmaster(num_tasks, self, ExceptionTask)
jobs = SCons.Job.Jobs(1, taskmaster)
jobs.start()
jobs.wait()
self.failIf(taskmaster.num_executed,
"a task was executed")
self.failUnless(taskmaster.num_iterated == 1,
"exactly one task should have been iterated")
self.failUnless(taskmaster.num_failed == 1,
"exactly one task should have failed")
class ParallelExceptionTestCase(unittest.TestCase):
def runTest(self):
"test parallel jobs with tasks that raise exceptions"
taskmaster = Taskmaster(num_tasks, self, ExceptionTask)
jobs = SCons.Job.Jobs(num_jobs, taskmaster)
jobs.start()
jobs.wait()
self.failIf(taskmaster.num_executed,
"a task was executed")
self.failUnless(taskmaster.num_iterated >= 1,
"one or more task should have been iterated")
self.failUnless(taskmaster.num_failed >= 1,
"one or more tasks should have failed")
def suite():
suite = unittest.TestSuite()
suite.addTest(ParallelTestCase())
suite.addTest(SerialTestCase())
suite.addTest(SerialExceptionTestCase())
suite.addTest(ParallelExceptionTestCase())
return suite
if __name__ == "__main__":
runner = unittest.TextTestRunner()
result = runner.run(suite())
if (len(result.failures) == 0
and len(result.errors) == 1
and type(result.errors[0][0]) == SerialTestCase
and type(result.errors[0][1][0]) == NoThreadsException):
sys.exit(2)
elif not result.wasSuccessful():
sys.exit(1)
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