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core20
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lib
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python3.8
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test
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libregrtest
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runtest.py
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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 format_duration, 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 TIMEOUT = -7 _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', TIMEOUT: '%s timed out', } # 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") text = fmt % result.test_name if result.result == TIMEOUT: text = '%s (%s)' % (text, format_duration(result.test_time)) return text 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, ns.ignore_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. TIMEOUT test timed out. 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,): 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(f"{test_name} left behind {kind} {name!r}") 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}")