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2daf6ae249
in order to make algorithmic complexity attacks on (e.g.) web apps much more complicated. The environment variable PYTHONHASHSEED and the new command line flag -R control this behavior.
129 lines
4.4 KiB
Python
129 lines
4.4 KiB
Python
# Common utility functions used by various script execution tests
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# e.g. test_cmd_line, test_cmd_line_script and test_runpy
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import sys
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import os
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import os.path
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import tempfile
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import subprocess
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import py_compile
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import contextlib
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import shutil
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import zipfile
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from test.support import strip_python_stderr
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# Executing the interpreter in a subprocess
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def _assert_python(expected_success, *args, **env_vars):
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cmd_line = [sys.executable]
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if not env_vars:
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cmd_line.append('-E')
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# Need to preserve the original environment, for in-place testing of
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# shared library builds.
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env = os.environ.copy()
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# But a special flag that can be set to override -- in this case, the
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# caller is responsible to pass the full environment.
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if env_vars.pop('__cleanenv', None):
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env = {}
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env.update(env_vars)
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cmd_line.extend(args)
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p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
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stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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env=env)
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try:
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out, err = p.communicate()
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finally:
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subprocess._cleanup()
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p.stdout.close()
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p.stderr.close()
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rc = p.returncode
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err = strip_python_stderr(err)
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if (rc and expected_success) or (not rc and not expected_success):
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raise AssertionError(
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"Process return code is %d, "
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"stderr follows:\n%s" % (rc, err.decode('ascii', 'ignore')))
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return rc, out, err
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def assert_python_ok(*args, **env_vars):
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"""
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Assert that running the interpreter with `args` and optional environment
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variables `env_vars` is ok and return a (return code, stdout, stderr) tuple.
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"""
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return _assert_python(True, *args, **env_vars)
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def assert_python_failure(*args, **env_vars):
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"""
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Assert that running the interpreter with `args` and optional environment
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variables `env_vars` fails and return a (return code, stdout, stderr) tuple.
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"""
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return _assert_python(False, *args, **env_vars)
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def spawn_python(*args):
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cmd_line = [sys.executable, '-E']
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cmd_line.extend(args)
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return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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def kill_python(p):
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p.stdin.close()
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data = p.stdout.read()
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p.stdout.close()
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# try to cleanup the child so we don't appear to leak when running
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# with regrtest -R.
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p.wait()
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subprocess._cleanup()
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return data
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# Script creation utilities
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@contextlib.contextmanager
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def temp_dir():
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dirname = tempfile.mkdtemp()
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dirname = os.path.realpath(dirname)
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try:
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yield dirname
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finally:
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shutil.rmtree(dirname)
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def make_script(script_dir, script_basename, source):
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script_filename = script_basename+os.extsep+'py'
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script_name = os.path.join(script_dir, script_filename)
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# The script should be encoded to UTF-8, the default string encoding
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script_file = open(script_name, 'w', encoding='utf-8')
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script_file.write(source)
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script_file.close()
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return script_name
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def make_pkg(pkg_dir, init_source=''):
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os.mkdir(pkg_dir)
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make_script(pkg_dir, '__init__', init_source)
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def make_zip_pkg(zip_dir, zip_basename, pkg_name, script_basename,
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source, depth=1, compiled=False):
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unlink = []
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init_name = make_script(zip_dir, '__init__', '')
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unlink.append(init_name)
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init_basename = os.path.basename(init_name)
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script_name = make_script(zip_dir, script_basename, source)
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unlink.append(script_name)
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if compiled:
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init_name = py_compile(init_name, doraise=True)
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script_name = py_compile(script_name, doraise=True)
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unlink.extend((init_name, script_name))
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pkg_names = [os.sep.join([pkg_name]*i) for i in range(1, depth+1)]
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script_name_in_zip = os.path.join(pkg_names[-1], os.path.basename(script_name))
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zip_filename = zip_basename+os.extsep+'zip'
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zip_name = os.path.join(zip_dir, zip_filename)
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zip_file = zipfile.ZipFile(zip_name, 'w')
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for name in pkg_names:
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init_name_in_zip = os.path.join(name, init_basename)
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zip_file.write(init_name, init_name_in_zip)
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zip_file.write(script_name, script_name_in_zip)
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zip_file.close()
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for name in unlink:
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os.unlink(name)
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#if test.support.verbose:
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# zip_file = zipfile.ZipFile(zip_name, 'r')
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# print 'Contents of %r:' % zip_name
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# zip_file.printdir()
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# zip_file.close()
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return zip_name, os.path.join(zip_name, script_name_in_zip)
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