cpython/Lib/test/libregrtest/runtest.py

337 lines
10 KiB
Python

import collections
import faulthandler
import functools
import gc
import importlib
import io
import os
import sys
import time
import traceback
import unittest
from test import support
from test.libregrtest.refleak import dash_R, clear_caches
from test.libregrtest.save_env import saved_test_environment
from test.libregrtest.utils import print_warning
# Test result constants.
PASSED = 1
FAILED = 0
ENV_CHANGED = -1
SKIPPED = -2
RESOURCE_DENIED = -3
INTERRUPTED = -4
CHILD_ERROR = -5 # error in a child process
TEST_DID_NOT_RUN = -6
_FORMAT_TEST_RESULT = {
PASSED: '%s passed',
FAILED: '%s failed',
ENV_CHANGED: '%s failed (env changed)',
SKIPPED: '%s skipped',
RESOURCE_DENIED: '%s skipped (resource denied)',
INTERRUPTED: '%s interrupted',
CHILD_ERROR: '%s crashed',
TEST_DID_NOT_RUN: '%s run no tests',
}
# Minimum duration of a test to display its duration or to mention that
# the test is running in background
PROGRESS_MIN_TIME = 30.0 # seconds
# small set of tests to determine if we have a basically functioning interpreter
# (i.e. if any of these fail, then anything else is likely to follow)
STDTESTS = [
'test_grammar',
'test_opcodes',
'test_dict',
'test_builtin',
'test_exceptions',
'test_types',
'test_unittest',
'test_doctest',
'test_doctest2',
'test_support'
]
# set of tests that we don't want to be executed when using regrtest
NOTTESTS = set()
# used by --findleaks, store for gc.garbage
FOUND_GARBAGE = []
def is_failed(result, ns):
ok = result.result
if ok in (PASSED, RESOURCE_DENIED, SKIPPED, TEST_DID_NOT_RUN):
return False
if ok == ENV_CHANGED:
return ns.fail_env_changed
return True
def format_test_result(result):
fmt = _FORMAT_TEST_RESULT.get(result.result, "%s")
return fmt % result.test_name
def findtestdir(path=None):
return path or os.path.dirname(os.path.dirname(__file__)) or os.curdir
def findtests(testdir=None, stdtests=STDTESTS, nottests=NOTTESTS):
"""Return a list of all applicable test modules."""
testdir = findtestdir(testdir)
names = os.listdir(testdir)
tests = []
others = set(stdtests) | nottests
for name in names:
mod, ext = os.path.splitext(name)
if mod[:5] == "test_" and ext in (".py", "") and mod not in others:
tests.append(mod)
return stdtests + sorted(tests)
def get_abs_module(ns, test_name):
if test_name.startswith('test.') or ns.testdir:
return test_name
else:
# Import it from the test package
return 'test.' + test_name
TestResult = collections.namedtuple('TestResult',
'test_name result test_time xml_data')
def _runtest(ns, test_name):
# Handle faulthandler timeout, capture stdout+stderr, XML serialization
# and measure time.
output_on_failure = ns.verbose3
use_timeout = (ns.timeout is not None)
if use_timeout:
faulthandler.dump_traceback_later(ns.timeout, exit=True)
start_time = time.perf_counter()
try:
support.set_match_tests(ns.match_tests)
support.junit_xml_list = xml_list = [] if ns.xmlpath else None
if ns.failfast:
support.failfast = True
if output_on_failure:
support.verbose = True
stream = io.StringIO()
orig_stdout = sys.stdout
orig_stderr = sys.stderr
try:
sys.stdout = stream
sys.stderr = stream
result = _runtest_inner(ns, test_name,
display_failure=False)
if result != PASSED:
output = stream.getvalue()
orig_stderr.write(output)
orig_stderr.flush()
finally:
sys.stdout = orig_stdout
sys.stderr = orig_stderr
else:
# Tell tests to be moderately quiet
support.verbose = ns.verbose
result = _runtest_inner(ns, test_name,
display_failure=not ns.verbose)
if xml_list:
import xml.etree.ElementTree as ET
xml_data = [ET.tostring(x).decode('us-ascii') for x in xml_list]
else:
xml_data = None
test_time = time.perf_counter() - start_time
return TestResult(test_name, result, test_time, xml_data)
finally:
if use_timeout:
faulthandler.cancel_dump_traceback_later()
support.junit_xml_list = None
def runtest(ns, test_name):
"""Run a single test.
ns -- regrtest namespace of options
test_name -- the name of the test
Returns the tuple (result, test_time, xml_data), where result is one
of the constants:
INTERRUPTED KeyboardInterrupt
RESOURCE_DENIED test skipped because resource denied
SKIPPED test skipped for some other reason
ENV_CHANGED test failed because it changed the execution environment
FAILED test failed
PASSED test passed
EMPTY_TEST_SUITE test ran no subtests.
If ns.xmlpath is not None, xml_data is a list containing each
generated testsuite element.
"""
try:
return _runtest(ns, test_name)
except:
if not ns.pgo:
msg = traceback.format_exc()
print(f"test {test_name} crashed -- {msg}",
file=sys.stderr, flush=True)
return TestResult(test_name, FAILED, 0.0, None)
def _test_module(the_module):
loader = unittest.TestLoader()
tests = loader.loadTestsFromModule(the_module)
for error in loader.errors:
print(error, file=sys.stderr)
if loader.errors:
raise Exception("errors while loading tests")
support.run_unittest(tests)
def _runtest_inner2(ns, test_name):
# Load the test function, run the test function, handle huntrleaks
# and findleaks to detect leaks
abstest = get_abs_module(ns, test_name)
# remove the module from sys.module to reload it if it was already imported
support.unload(abstest)
the_module = importlib.import_module(abstest)
# If the test has a test_main, that will run the appropriate
# tests. If not, use normal unittest test loading.
test_runner = getattr(the_module, "test_main", None)
if test_runner is None:
test_runner = functools.partial(_test_module, the_module)
try:
if ns.huntrleaks:
# Return True if the test leaked references
refleak = dash_R(ns, test_name, test_runner)
else:
test_runner()
refleak = False
finally:
cleanup_test_droppings(test_name, ns.verbose)
support.gc_collect()
if gc.garbage:
support.environment_altered = True
print_warning(f"{test_name} created {len(gc.garbage)} "
f"uncollectable object(s).")
# move the uncollectable objects somewhere,
# so we don't see them again
FOUND_GARBAGE.extend(gc.garbage)
gc.garbage.clear()
support.reap_children()
return refleak
def _runtest_inner(ns, test_name, display_failure=True):
# Detect environment changes, handle exceptions.
# Reset the environment_altered flag to detect if a test altered
# the environment
support.environment_altered = False
if ns.pgo:
display_failure = False
try:
clear_caches()
with saved_test_environment(test_name, ns.verbose, ns.quiet, pgo=ns.pgo) as environment:
refleak = _runtest_inner2(ns, test_name)
except support.ResourceDenied as msg:
if not ns.quiet and not ns.pgo:
print(f"{test_name} skipped -- {msg}", flush=True)
return RESOURCE_DENIED
except unittest.SkipTest as msg:
if not ns.quiet and not ns.pgo:
print(f"{test_name} skipped -- {msg}", flush=True)
return SKIPPED
except support.TestFailed as exc:
msg = f"test {test_name} failed"
if display_failure:
msg = f"{msg} -- {exc}"
print(msg, file=sys.stderr, flush=True)
return FAILED
except support.TestDidNotRun:
return TEST_DID_NOT_RUN
except KeyboardInterrupt:
print()
return INTERRUPTED
except:
if not ns.pgo:
msg = traceback.format_exc()
print(f"test {test_name} crashed -- {msg}",
file=sys.stderr, flush=True)
return FAILED
if refleak:
return FAILED
if environment.changed:
return ENV_CHANGED
return PASSED
def cleanup_test_droppings(test_name, verbose):
# First kill any dangling references to open files etc.
# This can also issue some ResourceWarnings which would otherwise get
# triggered during the following test run, and possibly produce failures.
support.gc_collect()
# Try to clean up junk commonly left behind. While tests shouldn't leave
# any files or directories behind, when a test fails that can be tedious
# for it to arrange. The consequences can be especially nasty on Windows,
# since if a test leaves a file open, it cannot be deleted by name (while
# there's nothing we can do about that here either, we can display the
# name of the offending test, which is a real help).
for name in (support.TESTFN,
"db_home",
):
if not os.path.exists(name):
continue
if os.path.isdir(name):
import shutil
kind, nuker = "directory", shutil.rmtree
elif os.path.isfile(name):
kind, nuker = "file", os.unlink
else:
raise RuntimeError(f"os.path says {name!r} exists but is neither "
f"directory nor file")
if verbose:
print_warning("%r left behind %s %r" % (test_name, kind, name))
support.environment_altered = True
try:
import stat
# fix possible permissions problems that might prevent cleanup
os.chmod(name, stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
nuker(name)
except Exception as exc:
print_warning(f"{test_name} left behind {kind} {name!r} "
f"and it couldn't be removed: {exc}")