cpython/Lib/test/libregrtest/main.py

713 lines
24 KiB
Python

import datetime
import faulthandler
import locale
import os
import platform
import random
import re
import sys
import sysconfig
import tempfile
import time
import unittest
from test.libregrtest.cmdline import _parse_args
from test.libregrtest.runtest import (
findtests, runtest, get_abs_module,
STDTESTS, NOTTESTS, PASSED, FAILED, ENV_CHANGED, SKIPPED, RESOURCE_DENIED,
INTERRUPTED, CHILD_ERROR, TEST_DID_NOT_RUN, TIMEOUT,
PROGRESS_MIN_TIME, format_test_result, is_failed)
from test.libregrtest.setup import setup_tests
from test.libregrtest.pgo import setup_pgo_tests
from test.libregrtest.utils import removepy, count, format_duration, printlist
from test import support
# bpo-38203: Maximum delay in seconds to exit Python (call Py_Finalize()).
# Used to protect against threading._shutdown() hang.
# Must be smaller than buildbot "1200 seconds without output" limit.
EXIT_TIMEOUT = 120.0
class Regrtest:
"""Execute a test suite.
This also parses command-line options and modifies its behavior
accordingly.
tests -- a list of strings containing test names (optional)
testdir -- the directory in which to look for tests (optional)
Users other than the Python test suite will certainly want to
specify testdir; if it's omitted, the directory containing the
Python test suite is searched for.
If the tests argument is omitted, the tests listed on the
command-line will be used. If that's empty, too, then all *.py
files beginning with test_ will be used.
The other default arguments (verbose, quiet, exclude,
single, randomize, findleaks, use_resources, trace, coverdir,
print_slow, and random_seed) allow programmers calling main()
directly to set the values that would normally be set by flags
on the command line.
"""
def __init__(self):
# Namespace of command line options
self.ns = None
# tests
self.tests = []
self.selected = []
# test results
self.good = []
self.bad = []
self.skipped = []
self.resource_denieds = []
self.environment_changed = []
self.run_no_tests = []
self.rerun = []
self.first_result = None
self.interrupted = False
# used by --slow
self.test_times = []
# used by --coverage, trace.Trace instance
self.tracer = None
# used to display the progress bar "[ 3/100]"
self.start_time = time.monotonic()
self.test_count = ''
self.test_count_width = 1
# used by --single
self.next_single_test = None
self.next_single_filename = None
# used by --junit-xml
self.testsuite_xml = None
# misc
self.win_load_tracker = None
self.tmp_dir = None
self.worker_test_name = None
def get_executed(self):
return (set(self.good) | set(self.bad) | set(self.skipped)
| set(self.resource_denieds) | set(self.environment_changed)
| set(self.run_no_tests))
def accumulate_result(self, result, rerun=False):
test_name = result.test_name
ok = result.result
if ok not in (CHILD_ERROR, INTERRUPTED) and not rerun:
self.test_times.append((result.test_time, test_name))
if ok == PASSED:
self.good.append(test_name)
elif ok in (FAILED, CHILD_ERROR):
if not rerun:
self.bad.append(test_name)
elif ok == ENV_CHANGED:
self.environment_changed.append(test_name)
elif ok == SKIPPED:
self.skipped.append(test_name)
elif ok == RESOURCE_DENIED:
self.skipped.append(test_name)
self.resource_denieds.append(test_name)
elif ok == TEST_DID_NOT_RUN:
self.run_no_tests.append(test_name)
elif ok == INTERRUPTED:
self.interrupted = True
elif ok == TIMEOUT:
self.bad.append(test_name)
else:
raise ValueError("invalid test result: %r" % ok)
if rerun and ok not in {FAILED, CHILD_ERROR, INTERRUPTED}:
self.bad.remove(test_name)
xml_data = result.xml_data
if xml_data:
import xml.etree.ElementTree as ET
for e in xml_data:
try:
self.testsuite_xml.append(ET.fromstring(e))
except ET.ParseError:
print(xml_data, file=sys.__stderr__)
raise
def log(self, line=''):
empty = not line
# add the system load prefix: "load avg: 1.80 "
load_avg = self.getloadavg()
if load_avg is not None:
line = f"load avg: {load_avg:.2f} {line}"
# add the timestamp prefix: "0:01:05 "
test_time = time.monotonic() - self.start_time
test_time = datetime.timedelta(seconds=int(test_time))
line = f"{test_time} {line}"
if empty:
line = line[:-1]
print(line, flush=True)
def display_progress(self, test_index, text):
if self.ns.quiet:
return
# "[ 51/405/1] test_tcl passed"
line = f"{test_index:{self.test_count_width}}{self.test_count}"
fails = len(self.bad) + len(self.environment_changed)
if fails and not self.ns.pgo:
line = f"{line}/{fails}"
self.log(f"[{line}] {text}")
def parse_args(self, kwargs):
ns = _parse_args(sys.argv[1:], **kwargs)
if ns.xmlpath:
support.junit_xml_list = self.testsuite_xml = []
worker_args = ns.worker_args
if worker_args is not None:
from test.libregrtest.runtest_mp import parse_worker_args
ns, test_name = parse_worker_args(ns.worker_args)
ns.worker_args = worker_args
self.worker_test_name = test_name
# Strip .py extensions.
removepy(ns.args)
if ns.huntrleaks:
warmup, repetitions, _ = ns.huntrleaks
if warmup < 1 or repetitions < 1:
msg = ("Invalid values for the --huntrleaks/-R parameters. The "
"number of warmups and repetitions must be at least 1 "
"each (1:1).")
print(msg, file=sys.stderr, flush=True)
sys.exit(2)
if ns.tempdir:
ns.tempdir = os.path.expanduser(ns.tempdir)
self.ns = ns
def find_tests(self, tests):
self.tests = tests
if self.ns.single:
self.next_single_filename = os.path.join(self.tmp_dir, 'pynexttest')
try:
with open(self.next_single_filename, 'r') as fp:
next_test = fp.read().strip()
self.tests = [next_test]
except OSError:
pass
if self.ns.fromfile:
self.tests = []
# regex to match 'test_builtin' in line:
# '0:00:00 [ 4/400] test_builtin -- test_dict took 1 sec'
regex = re.compile(r'\btest_[a-zA-Z0-9_]+\b')
with open(os.path.join(support.SAVEDCWD, self.ns.fromfile)) as fp:
for line in fp:
line = line.split('#', 1)[0]
line = line.strip()
match = regex.search(line)
if match is not None:
self.tests.append(match.group())
removepy(self.tests)
if self.ns.pgo:
# add default PGO tests if no tests are specified
setup_pgo_tests(self.ns)
stdtests = STDTESTS[:]
nottests = NOTTESTS.copy()
if self.ns.exclude:
for arg in self.ns.args:
if arg in stdtests:
stdtests.remove(arg)
nottests.add(arg)
self.ns.args = []
# if testdir is set, then we are not running the python tests suite, so
# don't add default tests to be executed or skipped (pass empty values)
if self.ns.testdir:
alltests = findtests(self.ns.testdir, list(), set())
else:
alltests = findtests(self.ns.testdir, stdtests, nottests)
if not self.ns.fromfile:
self.selected = self.tests or self.ns.args or alltests
else:
self.selected = self.tests
if self.ns.single:
self.selected = self.selected[:1]
try:
pos = alltests.index(self.selected[0])
self.next_single_test = alltests[pos + 1]
except IndexError:
pass
# Remove all the selected tests that precede start if it's set.
if self.ns.start:
try:
del self.selected[:self.selected.index(self.ns.start)]
except ValueError:
print("Couldn't find starting test (%s), using all tests"
% self.ns.start, file=sys.stderr)
if self.ns.randomize:
if self.ns.random_seed is None:
self.ns.random_seed = random.randrange(10000000)
random.seed(self.ns.random_seed)
random.shuffle(self.selected)
def list_tests(self):
for name in self.selected:
print(name)
def _list_cases(self, suite):
for test in suite:
if isinstance(test, unittest.loader._FailedTest):
continue
if isinstance(test, unittest.TestSuite):
self._list_cases(test)
elif isinstance(test, unittest.TestCase):
if support.match_test(test):
print(test.id())
def list_cases(self):
support.verbose = False
support.set_match_tests(self.ns.match_tests, self.ns.ignore_tests)
for test_name in self.selected:
abstest = get_abs_module(self.ns, test_name)
try:
suite = unittest.defaultTestLoader.loadTestsFromName(abstest)
self._list_cases(suite)
except unittest.SkipTest:
self.skipped.append(test_name)
if self.skipped:
print(file=sys.stderr)
print(count(len(self.skipped), "test"), "skipped:", file=sys.stderr)
printlist(self.skipped, file=sys.stderr)
def rerun_failed_tests(self):
self.ns.verbose = True
self.ns.failfast = False
self.ns.verbose3 = False
self.first_result = self.get_tests_result()
self.log()
self.log("Re-running failed tests in verbose mode")
self.rerun = self.bad[:]
for test_name in self.rerun:
self.log(f"Re-running {test_name} in verbose mode")
self.ns.verbose = True
result = runtest(self.ns, test_name)
self.accumulate_result(result, rerun=True)
if result.result == INTERRUPTED:
break
if self.bad:
print(count(len(self.bad), 'test'), "failed again:")
printlist(self.bad)
self.display_result()
def display_result(self):
# If running the test suite for PGO then no one cares about results.
if self.ns.pgo:
return
print()
print("== Tests result: %s ==" % self.get_tests_result())
if self.interrupted:
print("Test suite interrupted by signal SIGINT.")
omitted = set(self.selected) - self.get_executed()
if omitted:
print()
print(count(len(omitted), "test"), "omitted:")
printlist(omitted)
if self.good and not self.ns.quiet:
print()
if (not self.bad
and not self.skipped
and not self.interrupted
and len(self.good) > 1):
print("All", end=' ')
print(count(len(self.good), "test"), "OK.")
if self.ns.print_slow:
self.test_times.sort(reverse=True)
print()
print("10 slowest tests:")
for test_time, test in self.test_times[:10]:
print("- %s: %s" % (test, format_duration(test_time)))
if self.bad:
print()
print(count(len(self.bad), "test"), "failed:")
printlist(self.bad)
if self.environment_changed:
print()
print("{} altered the execution environment:".format(
count(len(self.environment_changed), "test")))
printlist(self.environment_changed)
if self.skipped and not self.ns.quiet:
print()
print(count(len(self.skipped), "test"), "skipped:")
printlist(self.skipped)
if self.rerun:
print()
print("%s:" % count(len(self.rerun), "re-run test"))
printlist(self.rerun)
if self.run_no_tests:
print()
print(count(len(self.run_no_tests), "test"), "run no tests:")
printlist(self.run_no_tests)
def run_tests_sequential(self):
if self.ns.trace:
import trace
self.tracer = trace.Trace(trace=False, count=True)
save_modules = sys.modules.keys()
self.log("Run tests sequentially")
previous_test = None
for test_index, test_name in enumerate(self.tests, 1):
start_time = time.monotonic()
text = test_name
if previous_test:
text = '%s -- %s' % (text, previous_test)
self.display_progress(test_index, text)
if self.tracer:
# If we're tracing code coverage, then we don't exit with status
# if on a false return value from main.
cmd = ('result = runtest(self.ns, test_name); '
'self.accumulate_result(result)')
ns = dict(locals())
self.tracer.runctx(cmd, globals=globals(), locals=ns)
result = ns['result']
else:
result = runtest(self.ns, test_name)
self.accumulate_result(result)
if result.result == INTERRUPTED:
break
previous_test = format_test_result(result)
test_time = time.monotonic() - start_time
if test_time >= PROGRESS_MIN_TIME:
previous_test = "%s in %s" % (previous_test, format_duration(test_time))
elif result.result == PASSED:
# be quiet: say nothing if the test passed shortly
previous_test = None
# Unload the newly imported modules (best effort finalization)
for module in sys.modules.keys():
if module not in save_modules and module.startswith("test."):
support.unload(module)
if self.ns.failfast and is_failed(result, self.ns):
break
if previous_test:
print(previous_test)
def _test_forever(self, tests):
while True:
for test_name in tests:
yield test_name
if self.bad:
return
if self.ns.fail_env_changed and self.environment_changed:
return
def display_header(self):
# Print basic platform information
print("==", platform.python_implementation(), *sys.version.split())
print("==", platform.platform(aliased=True),
"%s-endian" % sys.byteorder)
print("== cwd:", os.getcwd())
cpu_count = os.cpu_count()
if cpu_count:
print("== CPU count:", cpu_count)
print("== encodings: locale=%s, FS=%s"
% (locale.getpreferredencoding(False),
sys.getfilesystemencoding()))
def get_tests_result(self):
result = []
if self.bad:
result.append("FAILURE")
elif self.ns.fail_env_changed and self.environment_changed:
result.append("ENV CHANGED")
elif not any((self.good, self.bad, self.skipped, self.interrupted,
self.environment_changed)):
result.append("NO TEST RUN")
if self.interrupted:
result.append("INTERRUPTED")
if not result:
result.append("SUCCESS")
result = ', '.join(result)
if self.first_result:
result = '%s then %s' % (self.first_result, result)
return result
def run_tests(self):
# For a partial run, we do not need to clutter the output.
if (self.ns.header
or not(self.ns.pgo or self.ns.quiet or self.ns.single
or self.tests or self.ns.args)):
self.display_header()
if self.ns.huntrleaks:
warmup, repetitions, _ = self.ns.huntrleaks
if warmup < 3:
msg = ("WARNING: Running tests with --huntrleaks/-R and less than "
"3 warmup repetitions can give false positives!")
print(msg, file=sys.stdout, flush=True)
if self.ns.randomize:
print("Using random seed", self.ns.random_seed)
if self.ns.forever:
self.tests = self._test_forever(list(self.selected))
self.test_count = ''
self.test_count_width = 3
else:
self.tests = iter(self.selected)
self.test_count = '/{}'.format(len(self.selected))
self.test_count_width = len(self.test_count) - 1
if self.ns.use_mp:
from test.libregrtest.runtest_mp import run_tests_multiprocess
run_tests_multiprocess(self)
else:
self.run_tests_sequential()
def finalize(self):
if self.next_single_filename:
if self.next_single_test:
with open(self.next_single_filename, 'w') as fp:
fp.write(self.next_single_test + '\n')
else:
os.unlink(self.next_single_filename)
if self.tracer:
r = self.tracer.results()
r.write_results(show_missing=True, summary=True,
coverdir=self.ns.coverdir)
print()
duration = time.monotonic() - self.start_time
print("Total duration: %s" % format_duration(duration))
print("Tests result: %s" % self.get_tests_result())
if self.ns.runleaks:
os.system("leaks %d" % os.getpid())
def save_xml_result(self):
if not self.ns.xmlpath and not self.testsuite_xml:
return
import xml.etree.ElementTree as ET
root = ET.Element("testsuites")
# Manually count the totals for the overall summary
totals = {'tests': 0, 'errors': 0, 'failures': 0}
for suite in self.testsuite_xml:
root.append(suite)
for k in totals:
try:
totals[k] += int(suite.get(k, 0))
except ValueError:
pass
for k, v in totals.items():
root.set(k, str(v))
xmlpath = os.path.join(support.SAVEDCWD, self.ns.xmlpath)
with open(xmlpath, 'wb') as f:
for s in ET.tostringlist(root):
f.write(s)
def set_temp_dir(self):
if self.ns.tempdir:
self.tmp_dir = self.ns.tempdir
if not self.tmp_dir:
# When tests are run from the Python build directory, it is best practice
# to keep the test files in a subfolder. This eases the cleanup of leftover
# files using the "make distclean" command.
if sysconfig.is_python_build():
self.tmp_dir = sysconfig.get_config_var('abs_builddir')
if self.tmp_dir is None:
# bpo-30284: On Windows, only srcdir is available. Using
# abs_builddir mostly matters on UNIX when building Python
# out of the source tree, especially when the source tree
# is read only.
self.tmp_dir = sysconfig.get_config_var('srcdir')
self.tmp_dir = os.path.join(self.tmp_dir, 'build')
else:
self.tmp_dir = tempfile.gettempdir()
self.tmp_dir = os.path.abspath(self.tmp_dir)
def create_temp_dir(self):
os.makedirs(self.tmp_dir, exist_ok=True)
# Define a writable temp dir that will be used as cwd while running
# the tests. The name of the dir includes the pid to allow parallel
# testing (see the -j option).
pid = os.getpid()
if self.worker_test_name is not None:
test_cwd = 'test_python_worker_{}'.format(pid)
else:
test_cwd = 'test_python_{}'.format(pid)
test_cwd = os.path.join(self.tmp_dir, test_cwd)
return test_cwd
def cleanup(self):
import glob
path = os.path.join(self.tmp_dir, 'test_python_*')
print("Cleanup %s directory" % self.tmp_dir)
for name in glob.glob(path):
if os.path.isdir(name):
print("Remove directory: %s" % name)
support.rmtree(name)
else:
print("Remove file: %s" % name)
support.unlink(name)
def main(self, tests=None, **kwargs):
self.parse_args(kwargs)
self.set_temp_dir()
if self.ns.cleanup:
self.cleanup()
sys.exit(0)
test_cwd = self.create_temp_dir()
try:
# Run the tests in a context manager that temporarily changes the CWD
# to a temporary and writable directory. If it's not possible to
# create or change the CWD, the original CWD will be used.
# The original CWD is available from support.SAVEDCWD.
with support.temp_cwd(test_cwd, quiet=True):
# When using multiprocessing, worker processes will use test_cwd
# as their parent temporary directory. So when the main process
# exit, it removes also subdirectories of worker processes.
self.ns.tempdir = test_cwd
self._main(tests, kwargs)
except SystemExit as exc:
# bpo-38203: Python can hang at exit in Py_Finalize(), especially
# on threading._shutdown() call: put a timeout
faulthandler.dump_traceback_later(EXIT_TIMEOUT, exit=True)
sys.exit(exc.code)
def getloadavg(self):
if self.win_load_tracker is not None:
return self.win_load_tracker.getloadavg()
if hasattr(os, 'getloadavg'):
return os.getloadavg()[0]
return None
def _main(self, tests, kwargs):
if self.worker_test_name is not None:
from test.libregrtest.runtest_mp import run_tests_worker
run_tests_worker(self.ns, self.worker_test_name)
if self.ns.wait:
input("Press any key to continue...")
support.PGO = self.ns.pgo
support.PGO_EXTENDED = self.ns.pgo_extended
setup_tests(self.ns)
self.find_tests(tests)
if self.ns.list_tests:
self.list_tests()
sys.exit(0)
if self.ns.list_cases:
self.list_cases()
sys.exit(0)
# If we're on windows and this is the parent runner (not a worker),
# track the load average.
if sys.platform == 'win32' and self.worker_test_name is None:
from test.libregrtest.win_utils import WindowsLoadTracker
try:
self.win_load_tracker = WindowsLoadTracker()
except FileNotFoundError as error:
# Windows IoT Core and Windows Nano Server do not provide
# typeperf.exe for x64, x86 or ARM
print(f'Failed to create WindowsLoadTracker: {error}')
try:
self.run_tests()
self.display_result()
if self.ns.verbose2 and self.bad:
self.rerun_failed_tests()
finally:
if self.win_load_tracker is not None:
self.win_load_tracker.close()
self.win_load_tracker = None
self.finalize()
self.save_xml_result()
if self.bad:
sys.exit(2)
if self.interrupted:
sys.exit(130)
if self.ns.fail_env_changed and self.environment_changed:
sys.exit(3)
sys.exit(0)
def main(tests=None, **kwargs):
"""Run the Python suite."""
Regrtest().main(tests=tests, **kwargs)