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import datetime
import faulthandler
import locale
import os
import platform
import random
import re
import sys
import sysconfig
import tempfile
import textwrap
import time
from test.libregrtest.cmdline import _parse_args
from test.libregrtest.runtest import (
findtests, runtest,
STDTESTS, NOTTESTS, PASSED, FAILED, ENV_CHANGED, SKIPPED, RESOURCE_DENIED,
INTERRUPTED, CHILD_ERROR,
PROGRESS_MIN_TIME, format_test_result)
from test.libregrtest.setup import setup_tests
from test import support
try:
import gc
except ImportError:
gc = None
# 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():
TEMPDIR = os.path.join(sysconfig.get_config_var('srcdir'), 'build')
else:
TEMPDIR = tempfile.gettempdir()
TEMPDIR = os.path.abspath(TEMPDIR)
def format_duration(seconds):
if seconds < 1.0:
return '%.0f ms' % (seconds * 1e3)
if seconds < 60.0:
return '%.0f sec' % seconds
minutes, seconds = divmod(seconds, 60.0)
return '%.0f min %.0f sec' % (minutes, seconds)
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.interrupted = False
# used by --slow
self.test_times = []
# used by --coverage, trace.Trace instance
self.tracer = None
# used by --findleaks, store for gc.garbage
self.found_garbage = []
# 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
def accumulate_result(self, test, result):
ok, test_time = result
if ok not in (CHILD_ERROR, INTERRUPTED):
self.test_times.append((test_time, test))
if ok == PASSED:
self.good.append(test)
elif ok in (FAILED, CHILD_ERROR):
self.bad.append(test)
elif ok == ENV_CHANGED:
self.environment_changed.append(test)
elif ok == SKIPPED:
self.skipped.append(test)
elif ok == RESOURCE_DENIED:
self.skipped.append(test)
self.resource_denieds.append(test)
elif ok != INTERRUPTED:
raise ValueError("invalid test result: %r" % ok)
def display_progress(self, test_index, test):
if self.ns.quiet:
return
# "[ 51/405/1] test_tcl passed"
line = f"{test_index:{self.test_count_width}}{self.test_count}"
if self.bad and not self.ns.pgo:
line = f"{line}/{len(self.bad)}"
line = f"[{line}] {test}"
# add the system load prefix: "load avg: 1.80 "
if hasattr(os, 'getloadavg'):
load_avg_1min = os.getloadavg()[0]
line = f"load avg: {load_avg_1min:.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}"
print(line, flush=True)
def parse_args(self, kwargs):
ns = _parse_args(sys.argv[1:], **kwargs)
if ns.timeout and not hasattr(faulthandler, 'dump_traceback_later'):
print("Warning: The timeout option requires "
"faulthandler.dump_traceback_later", file=sys.stderr)
ns.timeout = None
if ns.threshold is not None and gc is None:
print('No GC available, ignore --threshold.', file=sys.stderr)
ns.threshold = None
if ns.findleaks:
if gc is not None:
# Uncomment the line below to report garbage that is not
# freeable by reference counting alone. By default only
# garbage that is not collectable by the GC is reported.
pass
#gc.set_debug(gc.DEBUG_SAVEALL)
else:
print('No GC available, disabling --findleaks',
file=sys.stderr)
ns.findleaks = False
# Strip .py extensions.
removepy(ns.args)
return ns
def find_tests(self, tests):
self.tests = tests
if self.ns.single:
self.next_single_filename = os.path.join(TEMPDIR, '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)
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 rerun_failed_tests(self):
self.ns.verbose = True
self.ns.failfast = False
self.ns.verbose3 = False
self.ns.match_tests = None
print("Re-running failed tests in verbose mode")
for test in self.bad[:]:
print("Re-running test %r in verbose mode" % test, flush=True)
try:
self.ns.verbose = True
ok = runtest(self.ns, test)
except KeyboardInterrupt:
self.interrupted = True
# print a newline separate from the ^C
print()
break
else:
if ok[0] in {PASSED, ENV_CHANGED, SKIPPED, RESOURCE_DENIED}:
self.bad.remove(test)
else:
if self.bad:
print(count(len(self.bad), 'test'), "failed again:")
printlist(self.bad)
def display_result(self):
if self.interrupted:
# print a newline after ^C
print()
print("Test suite interrupted by signal SIGINT.")
executed = set(self.good) | set(self.bad) | set(self.skipped)
omitted = set(self.selected) - executed
print(count(len(omitted), "test"), "omitted:")
printlist(omitted)
# If running the test suite for PGO then no one cares about
# results.
if self.ns.pgo:
return
if self.good and not self.ns.quiet:
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 time, test in self.test_times[:10]:
print("- %s: %s" % (test, format_duration(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)
def run_tests_sequential(self):
if self.ns.trace:
import trace
self.tracer = trace.Trace(trace=False, count=True)
save_modules = sys.modules.keys()
print("Run tests sequentially")
previous_test = None
for test_index, test in enumerate(self.tests, 1):
start_time = time.monotonic()
text = test
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); '
'self.accumulate_result(test, result)')
ns = dict(locals())
self.tracer.runctx(cmd, globals=globals(), locals=ns)
result = ns['result']
else:
try:
result = runtest(self.ns, test)
except KeyboardInterrupt:
self.interrupted = True
self.accumulate_result(test, (INTERRUPTED, None))
break
else:
self.accumulate_result(test, result)
previous_test = format_test_result(test, result[0])
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[0] == PASSED:
# be quiet: say nothing if the test passed shortly
previous_test = None
if self.ns.findleaks:
gc.collect()
if gc.garbage:
print("Warning: test created", len(gc.garbage), end=' ')
print("uncollectable object(s).")
# move the uncollectable objects somewhere so we don't see
# them again
self.found_garbage.extend(gc.garbage)
del gc.garbage[:]
# 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 previous_test:
print(previous_test)
def _test_forever(self, tests):
while True:
for test in tests:
yield test
if self.bad:
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("== hash algorithm:", sys.hash_info.algorithm,
"64bit" if sys.maxsize > 2**32 else "32bit")
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()))
print("Testing with flags:", sys.flags)
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.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))
if self.bad:
result = "FAILURE"
elif self.interrupted:
result = "INTERRUPTED"
else:
result = "SUCCESS"
print("Tests result: %s" % result)
if self.ns.runleaks:
os.system("leaks %d" % os.getpid())
def main(self, tests=None, **kwargs):
global TEMPDIR
if sysconfig.is_python_build():
try:
os.mkdir(TEMPDIR)
except FileExistsError:
pass
# 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).
test_cwd = 'test_python_{}'.format(os.getpid())
test_cwd = os.path.join(TEMPDIR, test_cwd)
# 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):
self._main(tests, kwargs)
def _main(self, tests, kwargs):
self.ns = self.parse_args(kwargs)
if self.ns.slaveargs is not None:
from test.libregrtest.runtest_mp import run_tests_slave
run_tests_slave(self.ns.slaveargs)
if self.ns.wait:
input("Press any key to continue...")
support.PGO = self.ns.pgo
setup_tests(self.ns)
self.find_tests(tests)
if self.ns.list_tests:
self.list_tests()
sys.exit(0)
self.run_tests()
self.display_result()
if self.ns.verbose2 and self.bad:
self.rerun_failed_tests()
self.finalize()
sys.exit(len(self.bad) > 0 or self.interrupted)
def removepy(names):
if not names:
return
for idx, name in enumerate(names):
basename, ext = os.path.splitext(name)
if ext == '.py':
names[idx] = basename
def count(n, word):
if n == 1:
return "%d %s" % (n, word)
else:
return "%d %ss" % (n, word)
def printlist(x, width=70, indent=4):
"""Print the elements of iterable x to stdout.
Optional arg width (default 70) is the maximum line length.
Optional arg indent (default 4) is the number of blanks with which to
begin each line.
"""
blanks = ' ' * indent
# Print the sorted list: 'x' may be a '--random' list or a set()
print(textwrap.fill(' '.join(str(elt) for elt in sorted(x)), width,
initial_indent=blanks, subsequent_indent=blanks))
def main(tests=None, **kwargs):
"""Run the Python suite."""
Regrtest().main(tests=tests, **kwargs)