boinc/test/testbase.py

806 lines
29 KiB
Python

## $Id$
# testbase.py
#
# A set of classes for testing BOINC.
# These classes let you create multiple projects and multiple hosts
# (all running on a single machine), add applications and work units,
# run the system, and verify that the results are correct.
#
# See doc/test.php for details
# TODO: make sure things work if build_dir != src_dir
import boinc_path_config
from Boinc import version
from Boinc.setup_project import *
import atexit, traceback, signal
import cgiserver
options.have_init_t = False
options.echo_overwrite = False
options.client_bin_filename = version.CLIENT_BIN_FILENAME
def test_init():
if options.have_init_t: return
options.have_init_t = True
if not os.path.exists('testbase.py'):
os.chdir(os.path.join(boinc_path_config.TOP_SOURCE_DIR,'test'))
if not os.path.exists('testbase.py'):
raise SystemExit('Could not find testbase.py anywhere')
#options.program_path = os.path.realpath(os.path.dirname(sys.argv[0]))
options.program_path = os.getcwd()
options.auto_setup = int(get_env_var("BOINC_TEST_AUTO_SETUP",1))#######
options.user_name = get_env_var("BOINC_TEST_USER_NAME", '') or get_env_var("USER")
options.db_user = options.user_name
options.db_passwd = ''
options.db_host = ''
options.delete_testbed = get_env_var("BOINC_TEST_DELETE", 'if-successful').lower()
# options.install_method = get_env_var("BOINC_TEST_INSTALL_METHOD", 'symlink').lower()
options.install_method = 'copy'
options.echo_verbose = int(get_env_var("BOINC_TEST_VERBOSE", '1'))
options.proxy_port = 16000 + (os.getpid() % 1000)
options.drop_db_first = True
if options.auto_setup:
cgiserver.setup_php(program_path = options.program_path)
options.auto_setup_basedir = 'run-%d'%os.getpid()
verbose_echo(0, "Creating testbed in %s"%options.auto_setup_basedir)
os.mkdir(options.auto_setup_basedir)
try:
os.unlink('run')
except OSError:
pass
try:
os.symlink(options.auto_setup_basedir, 'run')
except OSError:
pass
options.cgiserver_basedir = os.path.join(os.getcwd(), options.auto_setup_basedir)
options.cgiserver_port = 15000 + (os.getpid() % 1000)
options.cgiserver_baseurl = 'http://localhost:%d/' % options.cgiserver_port
CgiServer = AsynchCGIServer()
CgiServer.serve(base_dir=options.auto_setup_basedir, port=options.cgiserver_port)
options.projects_dir = os.path.join(options.cgiserver_basedir, 'projects')
options.cgi_dir = os.path.join(options.cgiserver_basedir, 'cgi-bin')
options.html_dir = os.path.join(options.cgiserver_basedir, 'html')
options.hosts_dir = os.path.join(options.cgiserver_basedir, 'hosts')
options.cgi_url = os.path.join(options.cgiserver_baseurl, 'cgi-bin')
options.html_url = os.path.join(options.cgiserver_baseurl, 'html')
options.port = options.cgiserver_port
map(os.mkdir, [options.projects_dir, options.cgi_dir, options.html_dir, options.hosts_dir])
else:
options.key_dir = get_env_var("BOINC_TEST_KEY_DIR")
options.projects_dir = get_env_var("BOINC_TEST_PROJECTS_DIR")
options.cgi_dir = get_env_var("BOINC_TEST_CGI_DIR")
options.html_dir = get_env_var("BOINC_TEST_HTML_DIR")
options.hosts_dir = get_env_var("BOINC_TEST_HOSTS_DIR")
options.cgi_url = get_env_var("BOINC_TEST_CGI_URL")
options.html_url = get_env_var("BOINC_TEST_HTML_URL")
m = re.compile('http://[^/]+:(\d+)/').match(options.html_url)
options.port = m and m.group(1) or 80
init()
def proxerize(url, t=True):
if t:
r = re.compile('http://[^/]*/')
return r.sub('http://localhost:%d/'%options.proxy_port, url)
else:
return url
def use_cgi_proxy():
test_init()
options.cgi_url = proxerize(options.cgi_url)
def use_html_proxy():
test_init()
options.html_url = proxerize(options.html_url)
def check_exists(file):
if not os.path.isfile(file):
error("file doesn't exist: " + file)
return 1
return 0
def check_deleted(file):
if os.path.isfile(file):
error("file wasn't deleted: " + file)
return 1
return 0
def check_files_match(file, correct, descr=''):
if not os.path.isfile(file):
error("file doesn't exist: %s (needs to match %s)" % (file,correct))
return 1
if os.system("diff %s %s" % (file, correct)):
error("File mismatch%s: %s %s" % (descr, file, correct))
return 1
else:
verbose_echo(2, "Files match%s: %s %s" % (descr, file, correct))
return 0
def _check_vars(dict, **names):
for key in names:
value = names[key]
if not key in dict:
if value == None:
raise SystemExit('error in test script: required parameter "%s" not specified'%key)
dict[key] = value
for key in dict:
if not key in names:
raise SystemExit('error in test script: extraneous parameter "%s" unknown'%key)
class STARTS_WITH(str):
pass
class MATCH_REGEXPS(list):
def match(self, text):
'''Returns True iff each regexp in self is in text'''
for r in self:
R = re.compile(r)
if not R.search(text):
return False
return True
pass
def dict_match(dic, resultdic):
'''match values in DIC against RESULTDIC'''
if not isinstance(dic, dict):
dic = dic.__dict__
for key in dic.keys():
expected = dic[key]
try:
found = resultdic[key]
except KeyError:
error("Database query result didn't have key '%s'!" % key)
continue
if isinstance(expected,STARTS_WITH):
match = found.startswith(expected)
elif isinstance(expected,MATCH_REGEXPS):
match = expected.match(found)
else:
match = found == expected
if not match:
id = resultdic.get('id', '?')
if str(found).count('\n') or str(expected).count('\n'):
format = """result %s: unexpected %s:
%s
(expected:)
%s"""
else:
format = "result %s: unexpected %s '%s' (expected '%s')"
error( format % (id, key, found, expected))
class ExpectedResult:
def __init__(self):
self.server_state = RESULT_SERVER_STATE_OVER
self.client_state = RESULT_FILES_UPLOADED
self.outcome = RESULT_OUTCOME_SUCCESS
class ExpectedResultComputeError:
def __init__(self):
self.server_state = RESULT_SERVER_STATE_OVER
self.client_state = RESULT_COMPUTE_DONE
self.outcome = RESULT_OUTCOME_CLIENT_ERROR
# TODO: figure out a better way to change settings for the progress meter than
# kill and refork
class ProjectList(list):
def __init__(self):
list.__init__(self)
self.state = '<error>'
self.pm_started = False
def install(self):
self.state = '<error>'
for i in self:
i.install()
def run(self):
self.set_progress_state('INIT ')
for i in self:
i.run()
def run_init_wait(self):
for i in self:
i.run_init_wait()
self.set_progress_state('RUNNING ')
def run_finish_wait(self):
self.set_progress_state('FINISH ')
for i in self:
i.run_finish_wait()
self.state='DONE '
def check(self):
for i in self:
i.check()
def stop(self):
for i in self:
i.maybe_stop()
def get_progress(self):
progress = []
for project in self:
progress.append(project.short_name + ": " + project.progress_meter_status())
return self.state + " " + ' | '.join(progress)
def start_progress_meter(self):
for project in self:
project.progress_meter_ctor()
self.rm = ResultMeter(self.get_progress)
self.pm_started = True
def stop_progress_meter(self):
if self.pm_started:
self.rm.stop()
for project in self:
project.progress_meter_dtor()
self.pm_started = False
def restart_progress_meter(self):
if self.pm_started:
self.stop_progress_meter()
self.start_progress_meter()
def set_progress_state(self, state):
self.state = state
self.restart_progress_meter()
all_projects = ProjectList()
DEFAULT_NUM_WU = 10
DEFAULT_REDUNDANCY = 5
def get_redundancy_args(num_wu = None, redundancy = None):
num_wu = num_wu or sys.argv[1:] and get_int(sys.argv[1]) or DEFAULT_NUM_WU
redundancy = redundancy or sys.argv[2:] and get_int(sys.argv[2]) or DEFAULT_REDUNDANCY
return (num_wu, redundancy)
class TestProject(Project):
def __init__(self, works, expected_result, appname=None,
num_wu=None, redundancy=None,
users=None, hosts=None,
add_to_list=True,
apps=None, app_versions=None, core_versions=None,
resource_share=None,
**kwargs):
test_init()
if add_to_list:
all_projects.append(self)
kwargs['short_name'] = kwargs.get('short_name') or 'test_'+appname
kwargs['long_name'] = kwargs.get('long_name') or 'Project ' + kwargs['short_name'].replace('_',' ').capitalize()
apply(Project.__init__, [self], kwargs)
(num_wu, redundancy) = get_redundancy_args(num_wu, redundancy)
self.resource_share = resource_share or 1
self.num_wu = num_wu
self.redundancy = redundancy
self.expected_result = expected_result
self.works = works
self.users = users or [User()]
self.hosts = hosts or [Host()]
self.platforms = [Platform()]
self.core_versions = core_versions or [CoreVersion(self.platforms[0])]
self.app_versions = app_versions or [
AppVersion(App(appname), self.platforms[0], appname)]
self.apps = apps or unique(map(lambda av: av.app, self.app_versions))
# convenience vars:
self.app_version = self.app_versions[0]
self.app = self.apps[0]
# convenience vars:
self.work = self.works[0]
self.user = self.users[0]
self.host = self.hosts[0]
self.started = False
def init_install(self):
if not options.auto_setup:
verbose_echo(1, "Deleting previous test runs")
rmtree(self.dir())
# self.drop_db_if_exists()
def query_create_keys(self):
'''Overrides Project::query_create_keys() to always return true'''
return True
def install_works(self):
for work in self.works:
work.install(self)
def install_hosts(self):
for host in self.hosts:
for user in self.users:
host.add_user(user, self)
host.install()
def install_platforms_versions(self):
def commit(list):
for item in list: item.commit()
self.platforms = unique(map(lambda a: a.platform, self.app_versions))
verbose_echo(1, "Setting up database: adding %d platform(s)" % len(self.platforms))
commit(self.platforms)
verbose_echo(1, "Setting up database: adding %d core version(s)" % len(self.core_versions))
commit(self.core_versions)
verbose_echo(1, "Setting up database: adding %d apps(s)" % len(self.apps))
commit(self.apps)
verbose_echo(1, "Setting up database: adding %d app version(s)" % len(self.app_versions))
commit(self.app_versions)
verbose_echo(1, "Setting up database: adding %d user(s)" % len(self.users))
commit(self.users)
def install(self):
self.init_install()
self.install_project()
self.install_platforms_versions()
self.install_works()
self.install_hosts()
def run(self):
self.sched_install('make_work', max_wus = self.num_wu)
self.sched_install('sample_dummy_assimilator')
self.sched_install('file_deleter')
self.sched_install('sample_bitwise_validator')
self.sched_install('feeder')
self.sched_install('transitioner')
self.start_servers()
def run_init_wait(self):
time.sleep(8)
def run_finish_wait(self):
'''Sleep until all workunits are assimilated and no workunits need to transition.
If more than X seconds have passed than just assume something is broken and return.'''
timeout = time.time() + 3*60
while (num_wus_assimilated() < self.num_wu) or num_wus_to_transition():
time.sleep(.5)
if time.time() > timeout:
error("run_finish_wait(): timed out waiting for workunits to assimilate/transition")
break
def check(self):
# verbose_sleep("Sleeping to allow server daemons to finish", 5)
# TODO: self.check_outputs(output_expected, ZZZ, YYY)
self.check_results(self.expected_result, self.num_wu*self.redundancy)
self.sched_run('file_deleter')
# self.check_deleted("download/input")
# TODO: use generator/iterator whatever to check all files deleted
# self.check_deleted("upload/uc_wu_%d_0", count=self.num_wu)
def progress_meter_ctor(self):
pass
def progress_meter_status(self):
return "WUs: [A:%d T:%d] Results: [U:%d,IP:%d,O:%d T:%d]" % (
num_wus_assimilated(),
#num_wus(),
self.num_wu,
num_results_unsent(),
num_results_in_progress(),
num_results_over(),
num_results())
def progress_meter_dtor(self):
pass
def _disable(self, *path):
'''Temporarily disable a file to test exponential backoff'''
path = apply(self.dir, path)
os.rename(path, path+'.disabled')
def _reenable(self, *path):
path = apply(self.dir, path)
os.rename(path+'.disabled', path)
def disable_masterindex(self):
self._disable('html_user/index.php')
def reenable_masterindex(self):
self._reenable('html_user/index.php')
def disable_scheduler(self, num = ''):
self._disable('cgi-bin/cgi'+str(num))
def reenable_scheduler(self, num = ''):
self._reenable('cgi-bin/cgi'+str(num))
def disable_downloaddir(self, num = ''):
self._disable('download'+str(num))
def reenable_downloaddir(self, num = ''):
self._reenable('download'+str(num))
def disable_file_upload_handler(self, num = ''):
self._disable('cgi-bin/file_upload_handler'+str(num))
def reenable_file_upload_handler(self, num = ''):
self._reenable('cgi-bin/file_upload_handler'+str(num))
def check_results(self, matchresult, expected_count=None):
'''MATCHRESULT should be a dictionary of columns to check, such as:
server_state
stderr_out
exit_status
'''
expected_count = expected_count or self.redundancy
results = database.Results.find()
for result in results:
dict_match(matchresult, result.__dict__)
if len(results) != expected_count:
error("expected %d results, but found %d" % (expected_count, len(results)))
def check_files_match(self, result, correct, count=None):
'''if COUNT is specified then [0,COUNT) is mapped onto the %d in RESULT'''
if count != None:
errs = 0
for i in range(count):
errs += self.check_files_match(result%i, correct)
return errs
return check_files_match(self.dir(result),
correct, " for project '%s'"%self.short_name)
def check_deleted(self, file, count=None):
if count != None:
errs = 0
for i in range(count):
errs += self.check_deleted(file%i)
return errs
return check_deleted(self.dir(file))
def check_exists(self, file, count=None):
if count != None:
errs = 0
for i in range(count):
errs += self.check_exists(file%i)
return errs
return check_exists(self.dir(file))
class Platform(database.Platform):
def __init__(self, name=None, user_friendly_name=None):
database.Platform.__init__(self)
self.name = name or version.PLATFORM
self.user_friendly_name = user_friendly_name or name
class CoreVersion(database.CoreVersion):
def __init__(self, platform):
database.CoreVersion.__init__(self)
self.version_num = 1
self.platform = platform
def commit(self):
self.xml_doc = tools.process_app_file(
os.path.join(boinc_path_config.TOP_BUILD_DIR,'client',
options.client_bin_filename),
quiet=True)
database.CoreVersion.commit(self)
class User(database.User):
def __init__(self):
database.User.__init__(self,id=None)
self.name = 'John'
self.email_addr = 'john@boinc.org'
self.authenticator = "3f7b90793a0175ad0bda68684e8bd136"
class App(database.App):
def __init__(self, name):
database.App.__init__(self,id=None)
self.name = name
self.min_version = 1
class AppVersion(database.AppVersion):
def __init__(self, app, platform, exec_file):
database.AppVersion.__init__(self,id=None)
self.app = app
self.version_num = version.BOINC_MAJOR_VERSION * 100
self.platform = platform
self.min_core_version = 1
self.max_core_version = 999
self._exec_file=exec_file
def commit(self):
self.xml_doc = tools.process_app_version(
self.app, self.version_num,
[os.path.join(boinc_path_config.TOP_BUILD_DIR,'apps',self._exec_file)],
quiet=True)
database.AppVersion.commit(self)
class HostList(list):
def run(self, asynch=False): map(lambda i: i.run(asynch=asynch), self)
def stop(self): map(lambda i: i.stop(), self)
all_hosts = HostList()
class Host:
def __init__(self, add_to_list=True):
if add_to_list:
all_hosts.append(self)
self.name = 'Commodore64'
self.users = []
self.projects = []
self.global_prefs = None
self.log_flags = 'log_flags.xml'
self.host_dir = os.path.join(options.hosts_dir, self.name)
self.defargs = "-exit_when_idle -skip_cpu_benchmarks -debug_fake_exponential_backoff -return_results_immediately"
# self.defargs = "-exit_when_idle -skip_cpu_benchmarks -sched_retry_delay_bin 1"
def add_user(self, user, project):
self.users.append(user)
self.projects.append(project)
def dir(self, *dirs):
return apply(os.path.join,(self.host_dir,)+dirs)
def install(self):
rmtree(self.dir())
os.mkdir(self.dir())
verbose_echo(1, "Setting up host '%s': creating account files" % self.name);
for (user,project) in map(None,self.users,self.projects):
filename = self.dir(account_file_name(project.config.config.master_url))
verbose_echo(2, "Setting up host '%s': writing %s" % (self.name, filename))
f = open(filename, "w")
print >>f, "<account>"
print >>f, map_xml(project.config.config, ['master_url'])
print >>f, map_xml(user, ['authenticator'])
if user.project_prefs:
print >>f, user.project_prefs
print >>f, "</account>"
f.close()
# copy log flags and global prefs, if any
if self.log_flags:
shutil.copy(self.log_flags, self.dir('log_flags.xml'))
# if self.global_prefs:
# shell_call("cp %s %s" % (self.global_prefs, self.dir('global_prefs.xml')))
# # shutil.copy(self.global_prefs, self.dir('global_prefs.xml'))
def run(self, args='', asynch=False):
if asynch:
verbose_echo(1, "Running core client asynchronously")
pid = os.fork()
if pid:
self.pid = pid
return
else:
verbose_echo(1, "Running core client")
verbose_shell_call("cd %s && %s %s %s > client.out 2> client.err" % (
self.dir(), builddir('client', options.client_bin_filename),
self.defargs, args))
if asynch: os._exit(0)
def stop(self):
if self.pid:
verbose_echo(1, "Stopping core client")
try:
os.kill(self.pid, 2)
except OSError:
verbose_echo(0, "Couldn't kill pid %d" % self.pid)
self.pid = 0
def read_cpu_time_file(filename):
try:
return float(open(self.dir(filename)).readline())
except:
return 0
def check_file_present(self, project, filename):
check_exists(self.dir('projects',
_url_to_filename(project.master_url),
filename))
# TODO: do this in Python
class Work:
def __init__(self, redundancy, **kwargs):
self.input_files = []
self.rsc_fpops_est = 1e10
self.rsc_fpops_bound = 4e10
self.rsc_memory_bound = 1e7
self.rsc_disk_bound = 1e7
self.delay_bound = 86400
if not isinstance(redundancy, int):
raise TypeError
self.min_quorum = redundancy
self.target_nresults = redundancy
self.max_error_results = redundancy * 2
self.max_total_results = redundancy * 4
self.max_success_results = redundancy * 2
self.app = None
self.__dict__.update(kwargs)
def install(self, project):
verbose_echo(1, "Installing work <%s> in project '%s'" %(
self.wu_template, project.short_name))
if not self.app:
self.app = project.app_versions[0].app
for input_file in unique(self.input_files):
install(os.path.realpath(input_file),
os.path.join(project.config.config.download_dir,
os.path.basename(input_file)))
# simulate multiple data servers by making symbolic links to the
# download directory
r = re.compile('<download_url/>([^<]+)<', re.IGNORECASE)
for line in open(self.wu_template):
match = r.search(line)
if match:
newdir = project.download_dir+match.group(1)
verbose_echo(2, "Linking "+newdir)
os.symlink(project.download_dir, newdir)
# simulate multiple data servers by making copies of the file upload
# handler
r = re.compile('<upload_url/>([^<]+)<', re.IGNORECASE)
for line in open(self.wu_template):
match = r.search(line)
if match:
handler = project.srcdir('sched', 'file_upload_handler')
newhandler = handler + match.group(1)
verbose_echo(2, "Linking "+newhandler)
os.symlink(handler, newhandler)
shutil.copy(self.result_template, project.dir());
cmd = build_command_line("create_work",
config_dir = project.dir(),
appname = self.app.name,
rsc_fpops_est = self.rsc_fpops_est,
rsc_fpops_bound = self.rsc_fpops_bound,
rsc_disk_bound = self.rsc_disk_bound,
rsc_memory_bound = self.rsc_memory_bound,
wu_template = self.wu_template,
result_template = self.result_template,
min_quorum = self.min_quorum,
target_nresults = self.target_nresults,
max_error_results = self.max_error_results,
max_total_results = self.max_total_results,
max_success_results = self.max_success_results,
wu_name = self.wu_template,
delay_bound = self.delay_bound)
for input_file in self.input_files:
cmd += ' ' + input_file
run_tool(cmd)
RESULT_METER_DELAY = 0.5
# Note: if test script errors with:
# _mysql_exceptions.OperationalError: 2013, 'Lost connection to MySQL server
# during query'
# Then your mysql server can't handle the load -- increase the RESULT_METER_DELAY
class ResultMeter:
def __init__(self, func, args=[], delay=RESULT_METER_DELAY):
'''Forks to print a progress meter'''
self.pid = os.fork()
if self.pid:
atexit.register(self.stop)
return
# re-open database
from Boinc import db_base, database
db_base.dbconnection = None
database.connect()
prev_s = None
while True:
s = apply(func, args)
if s != prev_s:
verbose_echo(1, s)
prev_s = s
time.sleep(delay)
def stop(self):
if self.pid:
os.kill(self.pid, 9)
self.pid = 0
def run_check_all():
'''Run all projects, run all hosts, check all projects, stop all projects.'''
atexit.register(all_projects.stop)
all_projects.install()
all_projects.run()
all_projects.start_progress_meter()
all_projects.run_init_wait()
if os.environ.get('TEST_STOP_BEFORE_HOST_RUN'):
verbose_echo(1, 'stopped')
# wait instead of killing backend procs.
# (Is there a better way to do this?)
while (1):
time.sleep(1)
raise SystemExit, 'Stopped due to $TEST_STOP_BEFORE_HOST_RUN'
# all_hosts.run(asynch=True)
all_hosts.run()
all_projects.run_finish_wait()
all_projects.stop_progress_meter()
print
# all_hosts.stop()
time.sleep(12)
all_projects.stop()
all_projects.check()
def delete_test():
'''Delete all test data'''
if options.auto_setup and hasattr(options,'auto_setup_basedir'):
verbose_echo(1, "Deleting testbed %s."%options.auto_setup_basedir)
try:
shutil.rmtree(options.auto_setup_basedir)
except e:
verbose_echo(0, "Couldn't delete testbed %s: %s"%(options.auto_setup_basedir,e))
class Proxy:
def __init__(self, code, cgi=0, html=0, start=1):
self.pid = 0
self.code = code
if cgi: use_cgi_proxy()
if html: use_html_proxy()
if start: self.start()
def start(self):
self.pid = os.fork()
if not self.pid:
verbose_shell_call(
"exec ./testproxy %d localhost:%d '%s' 2>testproxy.log" % (
options.proxy_port, options.port, self.code),
doexec=True)
verbose_sleep("Starting proxy server", 1)
# check if child process died
(pid,status) = os.waitpid(self.pid, os.WNOHANG)
if pid:
fatal_error("testproxy failed")
self.pid = 0
else:
atexit.register(self.stop)
def stop(self):
if self.pid:
verbose_echo(1, "Stopping proxy server")
try:
os.kill(self.pid, 2)
except OSError:
verbose_echo(0, "Couldn't kill pid %d" % self.pid)
self.pid = 0
class AsynchCGIServer:
def __init__(self):
self.pid = None
def serve(self, port, base_dir):
verbose_echo(0,"Running CGI server on localhost:%d"%port)
self.pid = os.fork()
if self.pid:
atexit.register(self.kill)
return
## child
os.chdir(base_dir)
sys.stderr = open('cgiserver.log', 'w', 0)
cgiserver.serve(port=port)
os._exit(1)
def kill(self):
if self.pid:
verbose_echo(1,"Killing cgiserver")
try:
os.kill(self.pid, 9)
except Exception:
verbose_echo(0, "Couldn't kill cgiserver pid %d" %self.pid)
self.pid = None
def test_msg(msg):
print
print "-- Testing", msg, '-'*(66-len(msg))
test_init()
def test_done():
test_init()
if sys.__dict__.get('last_traceback'):
if sys.last_type == KeyboardInterrupt:
errors.count += 0.1
sys.stderr.write("\nTest canceled by user\n")
else:
errors.count += 1
sys.stderr.write("\nException thrown - bug in test scripts?\n")
if errors.count:
verbose_echo(0, "ERRORS.COUNT: %d" % errors.count)
if options.delete_testbed == 'always':
delete_test()
return int(errors.count)
else:
verbose_echo(1, "Passed test!")
if options.echo_overwrite:
print
if options.delete_testbed == 'if-successful' or options.delete_testbed == 'always':
delete_test()
if options.echo_overwrite:
print
return 0
# Note: this bypasses other cleanup functions - if something goes wrong during
# exit, this may be the culprit.
def osexit_test_done():
os._exit(test_done())
atexit.register(osexit_test_done)