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#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Runs each test cases as a single shard, single process execution.
Similar to sharding_supervisor.py but finer grained. Runs multiple instances in
parallel.
"""
import fnmatch
import logging
import multiprocessing
import optparse
import os
import subprocess
import sys
import time
import list_test_cases
import trace_inputs
import worker_pool
TOOLS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, TOOLS_DIR)
import find_depot_tools # pylint: disable=F0401,W0611
import subprocess2
def call_with_timeout(cmd, cwd, timeout):
"""Runs an executable with an optional timeout."""
if timeout:
# This code path is much slower so only use it if necessary.
try:
output = subprocess2.check_output(
cmd,
cwd=cwd,
timeout=timeout,
stderr=subprocess2.STDOUT)
return output, 0
except subprocess2.CalledProcessError, e:
return e.stdout, e.returncode
else:
# This code path is much faster.
proc = subprocess.Popen(
cmd, cwd=cwd,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
output = proc.communicate()[0]
return output, proc.returncode
class Runner(object):
def __init__(self, executable, cwd_dir, timeout, progress):
# Constants
self.executable = executable
self.cwd_dir = cwd_dir
self.timeout = timeout
self.progress = progress
self.retry_count = 3
def map(self, test_case):
"""Traces a single test case and returns its output."""
cmd = [self.executable, '--gtest_filter=%s' % test_case]
cmd = list_test_cases.fix_python_path(cmd)
out = []
for retry in range(self.retry_count):
start = time.time()
output, returncode = call_with_timeout(cmd, self.cwd_dir, self.timeout)
duration = time.time() - start
out.append(
{
'test_case': test_case,
'returncode': returncode,
'duration': duration,
'output': output,
})
if returncode and retry != self.retry_count - 1:
self.progress.increase_count()
if retry:
self.progress.update_item('%s - %d' % (test_case, retry))
else:
self.progress.update_item(test_case)
if not returncode:
break
return out
def get_test_cases(executable, whitelist, blacklist):
"""Returns the filtered list of test cases.
This is done synchronously.
"""
try:
out = list_test_cases.gtest_list_tests(executable)
except list_test_cases.Failure, e:
print e.args[0]
return None
tests = list_test_cases.parse_gtest_cases(out)
# Filters the test cases with the two lists.
if blacklist:
tests = [
t for t in tests if not any(fnmatch.fnmatch(t, s) for s in blacklist)
]
if whitelist:
tests = [
t for t in tests if any(fnmatch.fnmatch(t, s) for s in whitelist)
]
logging.info(
'Found %d test cases in %s' % (len(tests), os.path.basename(executable)))
return tests
def run_test_cases(
executable, whitelist, blacklist, jobs, timeout, stats_only, no_dump):
"""Traces test cases one by one."""
test_cases = get_test_cases(executable, whitelist, blacklist)
if not test_cases:
return
progress = worker_pool.Progress(len(test_cases))
with worker_pool.ThreadPool(jobs or multiprocessing.cpu_count()) as pool:
function = Runner(executable, os.getcwd(), timeout, progress).map
for test_case in test_cases:
pool.add_task(function, test_case)
results = pool.join(progress, 0.1)
duration = time.time() - progress.start
results = dict((item[0]['test_case'], item) for item in results)
if not no_dump:
trace_inputs.write_json('%s.run_test_cases' % executable, results, False)
sys.stderr.write('\n')
total = len(results)
if not total:
return 1
# Classify the results
success = []
flaky = []
fail = []
nb_runs = 0
for test_case in sorted(results):
items = results[test_case]
nb_runs += len(items)
if not any(not i['returncode'] for i in items):
fail.append(test_case)
elif len(items) > 1 and any(not i['returncode'] for i in items):
flaky.append(test_case)
elif len(items) == 1 and items[0]['returncode'] == 0:
success.append(test_case)
else:
assert False, items
if not stats_only:
for test_case in sorted(fail):
# Failed, print the last one:
items = results[test_case]
print items[-1]['output']
for test_case in sorted(flaky):
items = results[test_case]
print '%s is flaky (tried %d times)' % (test_case, len(items))
print 'Success: %4d %5.2f%%' % (len(success), len(success) * 100. / total)
print 'Flaky: %4d %5.2f%%' % (len(flaky), len(flaky) * 100. / total)
print 'Fail: %4d %5.2f%%' % (len(fail), len(fail) * 100. / total)
print '%.1fs Done running %d tests with %d executions. %.1f test/s' % (
duration,
len(results),
nb_runs,
nb_runs / duration)
return 0
def main():
"""CLI frontend to validate arguments."""
parser = optparse.OptionParser(usage='%prog <options> [gtest]')
parser.add_option(
'-w', '--whitelist',
default=[],
action='append',
help='filter to apply to test cases to run, wildcard-style, defaults to '
'all test')
parser.add_option(
'-b', '--blacklist',
default=[],
action='append',
help='filter to apply to test cases to skip, wildcard-style, defaults to '
'no test')
parser.add_option(
'-j', '--jobs',
type='int',
help='number of parallel jobs')
parser.add_option(
'-t', '--timeout',
type='int',
help='Timeout for a single test case, in seconds default:%default')
parser.add_option(
'-s', '--stats',
action='store_true',
help='Only prints stats, not output')
parser.add_option(
'-v', '--verbose',
action='count',
default=int(os.environ.get('ISOLATE_DEBUG', 0)),
help='Use multiple times')
parser.add_option(
'--no-dump',
action='store_true',
help='do not generate a .test_cases file')
options, args = parser.parse_args()
levels = [logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG]
logging.basicConfig(
level=levels[min(len(levels)-1, options.verbose)],
format='%(levelname)5s %(module)15s(%(lineno)3d): %(message)s')
if len(args) != 1:
parser.error(
'Please provide the executable line to run, if you need fancy things '
'like xvfb, start this script from *inside* xvfb, it\'ll be much faster'
'.')
return run_test_cases(
args[0],
options.whitelist,
options.blacklist,
options.jobs,
options.timeout,
options.stats,
options.no_dump)
if __name__ == '__main__':
sys.exit(main())
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