Gecko [ beriskala.com ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
audiodata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
capath	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
cjkencodings	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
data	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
decimaltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
encoded_modules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
imghdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
namespace_pkgs	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
sndhdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
subprocessdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
support	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_email	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_importlib	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_json	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
tracedmodules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
xmltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
185test.db	16 KB	-rw-r--r--	2017-09-19 12:02
Sine-1000Hz-300ms.aif	60.25 KB	-rw-r--r--	2017-09-19 12:02
__init__.py	47 B	-rw-r--r--	2024-04-17 20:28
__main__.py	474 B	-rw-r--r--	2024-04-17 20:28
audiotests.py	9.34 KB	-rw-r--r--	2024-04-17 20:28
autotest.py	211 B	-rw-r--r--	2024-04-17 20:28
bad_coding.py	24 B	-rw-r--r--	2024-04-17 20:28
bad_coding2.py	30 B	-rw-r--r--	2024-04-17 20:28
badcert.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
badkey.pem	2.11 KB	-rw-r--r--	2017-09-19 12:02
badsyntax_3131.py	32 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future3.py	172 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future4.py	153 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future5.py	184 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future6.py	161 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future7.py	196 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future8.py	122 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future9.py	142 B	-rw-r--r--	2024-04-17 20:28
badsyntax_pep3120.py	14 B	-rw-r--r--	2024-04-17 20:28
buffer_tests.py	10.79 KB	-rw-r--r--	2024-04-17 20:28
cfgparser.1	21 B	-rw-r--r--	2017-09-19 12:02
cfgparser.2	19.02 KB	-rw-r--r--	2017-09-19 12:02
cfgparser.3	1.55 KB	-rw-r--r--	2017-09-19 12:02
check_soundcard.vbs	411 B	-rw-r--r--	2017-09-19 12:02
cmath_testcases.txt	133.86 KB	-rw-r--r--	2017-09-19 12:02
coding20731.py	18 B	-rw-r--r--	2024-04-17 20:28
curses_tests.py	1.22 KB	-rwxr-xr-x	2024-04-17 20:28
datetimetester.py	146.82 KB	-rw-r--r--	2024-04-17 20:28
dh1024.pem	300 B	-rw-r--r--	2017-09-19 12:02
dis_module.py	76 B	-rw-r--r--	2024-04-17 20:28
doctest_aliases.py	240 B	-rw-r--r--	2024-04-17 20:28
double_const.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
empty.vbs	70 B	-rw-r--r--	2017-09-19 12:02
exception_hierarchy.txt	1.69 KB	-rw-r--r--	2017-09-19 12:02
floating_points.txt	15.92 KB	-rw-r--r--	2017-09-19 12:02
fork_wait.py	2.1 KB	-rw-r--r--	2024-04-17 20:28
formatfloat_testcases.txt	7.45 KB	-rw-r--r--	2017-09-19 12:02
future_test1.py	229 B	-rw-r--r--	2024-04-17 20:28
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gdb_sample.py	153 B	-rw-r--r--	2024-04-17 20:28
ieee754.txt	3.21 KB	-rw-r--r--	2017-09-19 12:02
inspect_fodder.py	854 B	-rw-r--r--	2024-04-17 20:28
inspect_fodder2.py	1.39 KB	-rw-r--r--	2024-04-17 20:28
keycert.passwd.pem	1.79 KB	-rw-r--r--	2017-09-19 12:02
keycert.pem	1.74 KB	-rw-r--r--	2017-09-19 12:02
keycert2.pem	1.75 KB	-rw-r--r--	2017-09-19 12:02
list_tests.py	17.26 KB	-rw-r--r--	2024-04-17 20:28
lock_tests.py	25.47 KB	-rw-r--r--	2024-04-17 20:28
mailcap.txt	1.24 KB	-rw-r--r--	2017-09-19 12:02
make_ssl_certs.py	1.84 KB	-rw-r--r--	2024-04-17 20:28
mapping_tests.py	21.5 KB	-rw-r--r--	2024-04-17 20:28
math_testcases.txt	23.19 KB	-rw-r--r--	2017-09-19 12:02
memory_watchdog.py	859 B	-rw-r--r--	2024-04-17 20:28
mime.types	47.37 KB	-rw-r--r--	2017-09-19 12:02
mock_socket.py	3.32 KB	-rw-r--r--	2024-04-17 20:28
mp_fork_bomb.py	323 B	-rw-r--r--	2024-04-17 20:28
multibytecodec_support.py	14.25 KB	-rw-r--r--	2024-04-17 20:28
nokia.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
nullbytecert.pem	5.31 KB	-rw-r--r--	2017-09-19 12:02
nullcert.pem	0 B	-rw-r--r--	2017-09-19 12:02
outstanding_bugs.py	370 B	-rw-r--r--	2024-04-17 20:28
pickletester.py	60.31 KB	-rw-r--r--	2024-04-17 20:28
profilee.py	2.97 KB	-rw-r--r--	2024-04-17 20:28
pstats.pck	65.05 KB	-rw-r--r--	2017-09-19 12:02
pyclbr_input.py	648 B	-rw-r--r--	2024-04-17 20:28
pydoc_mod.py	461 B	-rw-r--r--	2024-04-17 20:28
pydocfodder.py	6.18 KB	-rw-r--r--	2024-04-17 20:28
pystone.py	7.22 KB	-rwxr-xr-x	2024-04-17 20:28
randv2_32.pck	7.34 KB	-rw-r--r--	2017-09-19 12:02
randv2_64.pck	7.19 KB	-rw-r--r--	2017-09-19 12:02
randv3.pck	7.82 KB	-rw-r--r--	2017-09-19 12:02
re_tests.py	31.06 KB	-rwxr-xr-x	2024-04-17 20:28
regrtest.py	63.54 KB	-rwxr-xr-x	2024-04-17 20:28
relimport.py	27 B	-rw-r--r--	2024-04-17 20:28
reperf.py	538 B	-rw-r--r--	2024-04-17 20:28
sample_doctest.py	1.02 KB	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_docstrings.py	227 B	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_doctests.py	269 B	-rw-r--r--	2024-04-17 20:28
script_helper.py	5.22 KB	-rw-r--r--	2024-04-17 20:28
selfsigned_pythontestdotnet.pem	956 B	-rw-r--r--	2017-09-19 12:02
seq_tests.py	13.49 KB	-rw-r--r--	2024-04-17 20:28
sgml_input.html	8.1 KB	-rw-r--r--	2017-09-19 12:02
sha256.pem	8.15 KB	-rw-r--r--	2017-09-19 12:02
sortperf.py	4.69 KB	-rw-r--r--	2024-04-17 20:28
ssl_cert.pem	867 B	-rw-r--r--	2017-09-19 12:02
ssl_key.passwd.pem	963 B	-rw-r--r--	2017-09-19 12:02
ssl_key.pem	916 B	-rw-r--r--	2017-09-19 12:02
ssl_servers.py	6.82 KB	-rw-r--r--	2024-04-17 20:28
string_tests.py	62.74 KB	-rw-r--r--	2024-04-17 20:28
test___all__.py	3.86 KB	-rw-r--r--	2024-04-17 20:28
test___future__.py	2.44 KB	-rw-r--r--	2024-04-17 20:28
test__locale.py	6.89 KB	-rw-r--r--	2024-04-17 20:28
test__osx_support.py	11.41 KB	-rw-r--r--	2024-04-17 20:28
test_abc.py	12.76 KB	-rw-r--r--	2024-04-17 20:28
test_abstract_numbers.py	1.49 KB	-rw-r--r--	2024-04-17 20:28
test_aifc.py	14.48 KB	-rw-r--r--	2024-04-17 20:28
test_argparse.py	158.6 KB	-rw-r--r--	2024-04-17 20:28
test_array.py	43.88 KB	-rw-r--r--	2024-04-17 20:28
test_ast.py	43.49 KB	-rw-r--r--	2024-04-17 20:28
test_asynchat.py	9.08 KB	-rw-r--r--	2024-04-17 20:28
test_asyncore.py	26.05 KB	-rw-r--r--	2024-04-17 20:28
test_atexit.py	3.53 KB	-rw-r--r--	2024-04-17 20:28
test_audioop.py	17.39 KB	-rw-r--r--	2024-04-17 20:28
test_augassign.py	7.44 KB	-rw-r--r--	2024-04-17 20:28
test_base64.py	14.34 KB	-rw-r--r--	2024-04-17 20:28
test_bigaddrspace.py	2.92 KB	-rw-r--r--	2024-04-17 20:28
test_bigmem.py	44.18 KB	-rw-r--r--	2024-04-17 20:28
test_binascii.py	9.94 KB	-rw-r--r--	2024-04-17 20:28
test_binhex.py	1.47 KB	-rw-r--r--	2024-04-17 20:28
test_binop.py	12.36 KB	-rw-r--r--	2024-04-17 20:28
test_bisect.py	13.65 KB	-rw-r--r--	2024-04-17 20:28
test_bool.py	11.81 KB	-rw-r--r--	2024-04-17 20:28
test_buffer.py	155.09 KB	-rw-r--r--	2024-04-17 20:28
test_bufio.py	2.54 KB	-rw-r--r--	2024-04-17 20:28
test_builtin.py	54.84 KB	-rw-r--r--	2024-04-17 20:28
test_bytes.py	52.86 KB	-rw-r--r--	2024-04-17 20:28
test_bz2.py	30.8 KB	-rw-r--r--	2024-04-17 20:28
test_calendar.py	38.7 KB	-rw-r--r--	2024-04-17 20:28
test_call.py	3.08 KB	-rw-r--r--	2024-04-17 20:28
test_capi.py	13.81 KB	-rw-r--r--	2024-04-17 20:28
test_cgi.py	17.34 KB	-rw-r--r--	2024-04-17 20:28
test_cgitb.py	2.49 KB	-rw-r--r--	2024-04-17 20:28
test_charmapcodec.py	1.75 KB	-rw-r--r--	2024-04-17 20:28
test_class.py	13.79 KB	-rw-r--r--	2024-04-17 20:28
test_cmath.py	20.38 KB	-rw-r--r--	2024-04-17 20:28
test_cmd.py	6.08 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line.py	15.35 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line_script.py	16.95 KB	-rw-r--r--	2024-04-17 20:28
test_code.py	3.54 KB	-rw-r--r--	2024-04-17 20:28
test_code_module.py	2.42 KB	-rw-r--r--	2024-04-17 20:28
test_codeccallbacks.py	33.17 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_cn.py	3.38 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_hk.py	775 B	-rw-r--r--	2024-04-17 20:28
test_codecencodings_iso2022.py	1.43 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_jp.py	4.86 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_kr.py	3.03 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_tw.py	755 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_cn.py	930 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_hk.py	505 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_jp.py	1.88 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_kr.py	1.34 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_tw.py	880 B	-rw-r--r--	2024-04-17 20:28
test_codecs.py	96.02 KB	-rw-r--r--	2024-04-17 20:28
test_codeop.py	7.45 KB	-rw-r--r--	2024-04-17 20:28
test_coding.py	2.51 KB	-rw-r--r--	2024-04-17 20:28
test_collections.py	54.31 KB	-rw-r--r--	2024-04-17 20:28
test_colorsys.py	2.77 KB	-rw-r--r--	2024-04-17 20:28
test_compare.py	1.63 KB	-rw-r--r--	2024-04-17 20:28
test_compile.py	18.62 KB	-rw-r--r--	2024-04-17 20:28
test_compileall.py	15.73 KB	-rw-r--r--	2024-04-17 20:28
test_complex.py	27.09 KB	-rw-r--r--	2024-04-17 20:28
test_concurrent_futures.py	22.57 KB	-rw-r--r--	2024-04-17 20:28
test_configparser.py	69.26 KB	-rw-r--r--	2024-04-17 20:28
test_contains.py	2.58 KB	-rw-r--r--	2024-04-17 20:28
test_contextlib.py	21.39 KB	-rw-r--r--	2024-04-17 20:28
test_copy.py	21.9 KB	-rw-r--r--	2024-04-17 20:28
test_copyreg.py	4.12 KB	-rw-r--r--	2024-04-17 20:28
test_cprofile.py	5.32 KB	-rw-r--r--	2024-04-17 20:28
test_crashers.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
test_crypt.py	1.24 KB	-rw-r--r--	2024-04-17 20:28
test_csv.py	40.9 KB	-rw-r--r--	2024-04-17 20:28
test_ctypes.py	400 B	-rw-r--r--	2024-04-17 20:28
test_curses.py	10.7 KB	-rw-r--r--	2024-04-17 20:28
test_datetime.py	1.81 KB	-rw-r--r--	2024-04-17 20:28
test_dbm.py	5.52 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_dumb.py	5.49 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_gnu.py	2.85 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_ndbm.py	1.13 KB	-rw-r--r--	2024-04-17 20:28
test_decimal.py	197.66 KB	-rw-r--r--	2024-04-17 20:28
test_decorators.py	9.6 KB	-rw-r--r--	2024-04-17 20:28
test_defaultdict.py	5.94 KB	-rw-r--r--	2024-04-17 20:28
test_deque.py	25 KB	-rw-r--r--	2024-04-17 20:28
test_descr.py	156.64 KB	-rw-r--r--	2024-04-17 20:28
test_descrtut.py	11.5 KB	-rw-r--r--	2024-04-17 20:28
test_devpoll.py	3.49 KB	-rw-r--r--	2024-04-17 20:28
test_dict.py	31.11 KB	-rw-r--r--	2024-04-17 20:28
test_dictcomps.py	3.69 KB	-rw-r--r--	2024-04-17 20:28
test_dictviews.py	8.51 KB	-rw-r--r--	2024-04-17 20:28
test_difflib.py	10.78 KB	-rw-r--r--	2024-04-17 20:28
test_difflib_expect.html	100.86 KB	-rw-r--r--	2017-09-19 12:02
test_dis.py	12.33 KB	-rw-r--r--	2024-04-17 20:28
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test_doctest.py	81.78 KB	-rw-r--r--	2024-04-17 20:28
test_doctest.txt	300 B	-rw-r--r--	2017-09-19 12:02
test_doctest2.py	2.3 KB	-rw-r--r--	2024-04-17 20:28
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test_eof.py	855 B	-rw-r--r--	2024-04-17 20:28
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test_fnmatch.py	2.84 KB	-rw-r--r--	2024-04-17 20:28
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test_future4.py	105 B	-rw-r--r--	2024-04-17 20:28
test_future5.py	510 B	-rw-r--r--	2024-04-17 20:28
test_gc.py	29 KB	-rw-r--r--	2024-04-17 20:28
test_gdb.py	35.86 KB	-rw-r--r--	2024-04-17 20:28
test_generators.py	48.5 KB	-rw-r--r--	2024-04-17 20:28
test_genericpath.py	13.3 KB	-rw-r--r--	2024-04-17 20:28
test_genexps.py	7.12 KB	-rw-r--r--	2024-04-17 20:28
test_getargs2.py	23.74 KB	-rw-r--r--	2024-04-17 20:28
test_getopt.py	6.8 KB	-rw-r--r--	2024-04-17 20:28
test_getpass.py	5.95 KB	-rw-r--r--	2024-04-17 20:28
test_gettext.py	22.11 KB	-rw-r--r--	2024-04-17 20:28
test_glob.py	6.69 KB	-rw-r--r--	2024-04-17 20:28
test_global.py	1.25 KB	-rw-r--r--	2024-04-17 20:28
test_grammar.py	31.96 KB	-rw-r--r--	2024-04-17 20:28
test_grp.py	3.18 KB	-rw-r--r--	2024-04-17 20:28
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test_heapq.py	14.14 KB	-rw-r--r--	2024-04-17 20:28
test_hmac.py	17.23 KB	-rw-r--r--	2024-04-17 20:28
test_html.py	579 B	-rw-r--r--	2024-04-17 20:28
test_htmlparser.py	30.74 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookiejar.py	70 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookies.py	9.98 KB	-rw-r--r--	2024-04-17 20:28
test_httplib.py	37.59 KB	-rw-r--r--	2024-04-17 20:28
test_httpservers.py	26.35 KB	-rw-r--r--	2024-04-17 20:28
test_idle.py	1.3 KB	-rw-r--r--	2024-04-17 20:28
test_imaplib.py	15.67 KB	-rw-r--r--	2024-04-17 20:28
test_imghdr.py	4.31 KB	-rw-r--r--	2024-04-17 20:28
test_imp.py	18.89 KB	-rw-r--r--	2024-04-17 20:28
test_import.py	38.55 KB	-rw-r--r--	2024-04-17 20:28
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Rename

import os
import sys
import unittest
import ast
import weakref

from test import support

def to_tuple(t):
    if t is None or isinstance(t, (str, int, complex)):
        return t
    elif isinstance(t, list):
        return [to_tuple(e) for e in t]
    result = [t.__class__.__name__]
    if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
        result.append((t.lineno, t.col_offset))
    if t._fields is None:
        return tuple(result)
    for f in t._fields:
        result.append(to_tuple(getattr(t, f)))
    return tuple(result)

# These tests are compiled through "exec"
# There should be at least one test per statement
exec_tests = [
    # None
    "None",
    # FunctionDef
    "def f(): pass",
    # FunctionDef with arg
    "def f(a): pass",
    # FunctionDef with arg and default value
    "def f(a=0): pass",
    # FunctionDef with varargs
    "def f(*args): pass",
    # FunctionDef with kwargs
    "def f(**kwargs): pass",
    # FunctionDef with all kind of args
    "def f(a, b=1, c=None, d=[], e={}, *args, **kwargs): pass",
    # ClassDef
    "class C:pass",
    # ClassDef, new style class
    "class C(object): pass",
    # Return
    "def f():return 1",
    # Delete
    "del v",
    # Assign
    "v = 1",
    # AugAssign
    "v += 1",
    # For
    "for v in v:pass",
    # While
    "while v:pass",
    # If
    "if v:pass",
    # With
    "with x as y: pass",
    "with x as y, z as q: pass",
    # Raise
    "raise Exception('string')",
    # TryExcept
    "try:\n  pass\nexcept Exception:\n  pass",
    # TryFinally
    "try:\n  pass\nfinally:\n  pass",
    # Assert
    "assert v",
    # Import
    "import sys",
    # ImportFrom
    "from sys import v",
    # Global
    "global v",
    # Expr
    "1",
    # Pass,
    "pass",
    # Break
    "break",
    # Continue
    "continue",
    # for statements with naked tuples (see http://bugs.python.org/issue6704)
    "for a,b in c: pass",
    "[(a,b) for a,b in c]",
    "((a,b) for a,b in c)",
    "((a,b) for (a,b) in c)",
    # Multiline generator expression (test for .lineno & .col_offset)
    """(
    (
    Aa
    ,
       Bb
    )
    for
    Aa
    ,
    Bb in Cc
    )""",
    # dictcomp
    "{a : b for w in x for m in p if g}",
    # dictcomp with naked tuple
    "{a : b for v,w in x}",
    # setcomp
    "{r for l in x if g}",
    # setcomp with naked tuple
    "{r for l,m in x}",
]

# These are compiled through "single"
# because of overlap with "eval", it just tests what
# can't be tested with "eval"
single_tests = [
    "1+2"
]

# These are compiled through "eval"
# It should test all expressions
eval_tests = [
  # None
  "None",
  # BoolOp
  "a and b",
  # BinOp
  "a + b",
  # UnaryOp
  "not v",
  # Lambda
  "lambda:None",
  # Dict
  "{ 1:2 }",
  # Empty dict
  "{}",
  # Set
  "{None,}",
  # Multiline dict (test for .lineno & .col_offset)
  """{
      1
        :
          2
     }""",
  # ListComp
  "[a for b in c if d]",
  # GeneratorExp
  "(a for b in c if d)",
  # Yield - yield expressions can't work outside a function
  #
  # Compare
  "1 < 2 < 3",
  # Call
  "f(1,2,c=3,*d,**e)",
  # Num
  "10",
  # Str
  "'string'",
  # Attribute
  "a.b",
  # Subscript
  "a[b:c]",
  # Name
  "v",
  # List
  "[1,2,3]",
  # Empty list
  "[]",
  # Tuple
  "1,2,3",
  # Tuple
  "(1,2,3)",
  # Empty tuple
  "()",
  # Combination
  "a.b.c.d(a.b[1:2])",

]

# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
# excepthandler, arguments, keywords, alias

class AST_Tests(unittest.TestCase):

def _assertTrueorder(self, ast_node, parent_pos):
        if not isinstance(ast_node, ast.AST) or ast_node._fields is None:
            return
        if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)):
            node_pos = (ast_node.lineno, ast_node.col_offset)
            self.assertTrue(node_pos >= parent_pos)
            parent_pos = (ast_node.lineno, ast_node.col_offset)
        for name in ast_node._fields:
            value = getattr(ast_node, name)
            if isinstance(value, list):
                for child in value:
                    self._assertTrueorder(child, parent_pos)
            elif value is not None:
                self._assertTrueorder(value, parent_pos)

def test_AST_objects(self):
        x = ast.AST()
        self.assertEqual(x._fields, ())
        x.foobar = 42
        self.assertEqual(x.foobar, 42)
        self.assertEqual(x.__dict__["foobar"], 42)

with self.assertRaises(AttributeError):
            x.vararg

with self.assertRaises(TypeError):
            # "_ast.AST constructor takes 0 positional arguments"
            ast.AST(2)

def test_AST_garbage_collection(self):
        class X:
            pass
        a = ast.AST()
        a.x = X()
        a.x.a = a
        ref = weakref.ref(a.x)
        del a
        support.gc_collect()
        self.assertIsNone(ref())

def test_snippets(self):
        for input, output, kind in ((exec_tests, exec_results, "exec"),
                                    (single_tests, single_results, "single"),
                                    (eval_tests, eval_results, "eval")):
            for i, o in zip(input, output):
                ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST)
                self.assertEqual(to_tuple(ast_tree), o)
                self._assertTrueorder(ast_tree, (0, 0))

def test_slice(self):
        slc = ast.parse("x[::]").body[0].value.slice
        self.assertIsNone(slc.upper)
        self.assertIsNone(slc.lower)
        self.assertIsNone(slc.step)

def test_from_import(self):
        im = ast.parse("from . import y").body[0]
        self.assertIsNone(im.module)

def test_non_interned_future_from_ast(self):
        mod = ast.parse("from __future__ import division")
        self.assertIsInstance(mod.body[0], ast.ImportFrom)
        mod.body[0].module = " __future__ ".strip()
        compile(mod, "<test>", "exec")

def test_base_classes(self):
        self.assertTrue(issubclass(ast.For, ast.stmt))
        self.assertTrue(issubclass(ast.Name, ast.expr))
        self.assertTrue(issubclass(ast.stmt, ast.AST))
        self.assertTrue(issubclass(ast.expr, ast.AST))
        self.assertTrue(issubclass(ast.comprehension, ast.AST))
        self.assertTrue(issubclass(ast.Gt, ast.AST))

def test_field_attr_existence(self):
        for name, item in ast.__dict__.items():
            if isinstance(item, type) and name != 'AST' and name[0].isupper():
                x = item()
                if isinstance(x, ast.AST):
                    self.assertEqual(type(x._fields), tuple)

def test_arguments(self):
        x = ast.arguments()
        self.assertEqual(x._fields, ('args', 'vararg', 'varargannotation',
                                      'kwonlyargs', 'kwarg', 'kwargannotation',
                                      'defaults', 'kw_defaults'))

with self.assertRaises(AttributeError):
            x.vararg

x = ast.arguments(*range(1, 9))
        self.assertEqual(x.vararg, 2)

def test_field_attr_writable(self):
        x = ast.Num()
        # We can assign to _fields
        x._fields = 666
        self.assertEqual(x._fields, 666)

def test_classattrs(self):
        x = ast.Num()
        self.assertEqual(x._fields, ('n',))

with self.assertRaises(AttributeError):
            x.n

x = ast.Num(42)
        self.assertEqual(x.n, 42)

with self.assertRaises(AttributeError):
            x.lineno

with self.assertRaises(AttributeError):
            x.foobar

x = ast.Num(lineno=2)
        self.assertEqual(x.lineno, 2)

x = ast.Num(42, lineno=0)
        self.assertEqual(x.lineno, 0)
        self.assertEqual(x._fields, ('n',))
        self.assertEqual(x.n, 42)

self.assertRaises(TypeError, ast.Num, 1, 2)
        self.assertRaises(TypeError, ast.Num, 1, 2, lineno=0)

def test_module(self):
        body = [ast.Num(42)]
        x = ast.Module(body)
        self.assertEqual(x.body, body)

def test_nodeclasses(self):
        # Zero arguments constructor explicitly allowed
        x = ast.BinOp()
        self.assertEqual(x._fields, ('left', 'op', 'right'))

# Random attribute allowed too
        x.foobarbaz = 5
        self.assertEqual(x.foobarbaz, 5)

n1 = ast.Num(1)
        n3 = ast.Num(3)
        addop = ast.Add()
        x = ast.BinOp(n1, addop, n3)
        self.assertEqual(x.left, n1)
        self.assertEqual(x.op, addop)
        self.assertEqual(x.right, n3)

x = ast.BinOp(1, 2, 3)
        self.assertEqual(x.left, 1)
        self.assertEqual(x.op, 2)
        self.assertEqual(x.right, 3)

x = ast.BinOp(1, 2, 3, lineno=0)
        self.assertEqual(x.left, 1)
        self.assertEqual(x.op, 2)
        self.assertEqual(x.right, 3)
        self.assertEqual(x.lineno, 0)

# node raises exception when not given enough arguments
        self.assertRaises(TypeError, ast.BinOp, 1, 2)
        # node raises exception when given too many arguments
        self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4)
        # node raises exception when not given enough arguments
        self.assertRaises(TypeError, ast.BinOp, 1, 2, lineno=0)
        # node raises exception when given too many arguments
        self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4, lineno=0)

# can set attributes through kwargs too
        x = ast.BinOp(left=1, op=2, right=3, lineno=0)
        self.assertEqual(x.left, 1)
        self.assertEqual(x.op, 2)
        self.assertEqual(x.right, 3)
        self.assertEqual(x.lineno, 0)

# Random kwargs also allowed
        x = ast.BinOp(1, 2, 3, foobarbaz=42)
        self.assertEqual(x.foobarbaz, 42)

def test_no_fields(self):
        # this used to fail because Sub._fields was None
        x = ast.Sub()
        self.assertEqual(x._fields, ())

def test_pickling(self):
        import pickle
        mods = [pickle]
        try:
            import cPickle
            mods.append(cPickle)
        except ImportError:
            pass
        protocols = [0, 1, 2]
        for mod in mods:
            for protocol in protocols:
                for ast in (compile(i, "?", "exec", 0x400) for i in exec_tests):
                    ast2 = mod.loads(mod.dumps(ast, protocol))
                    self.assertEqual(to_tuple(ast2), to_tuple(ast))

def test_invalid_sum(self):
        pos = dict(lineno=2, col_offset=3)
        m = ast.Module([ast.Expr(ast.expr(**pos), **pos)])
        with self.assertRaises(TypeError) as cm:
            compile(m, "<test>", "exec")
        self.assertIn("but got <_ast.expr", str(cm.exception))

def test_invalid_identitifer(self):
        m = ast.Module([ast.Expr(ast.Name(42, ast.Load()))])
        ast.fix_missing_locations(m)
        with self.assertRaises(TypeError) as cm:
            compile(m, "<test>", "exec")
        self.assertIn("identifier must be of type str", str(cm.exception))

def test_invalid_string(self):
        m = ast.Module([ast.Expr(ast.Str(42))])
        ast.fix_missing_locations(m)
        with self.assertRaises(TypeError) as cm:
            compile(m, "<test>", "exec")
        self.assertIn("string must be of type str", str(cm.exception))

def test_empty_yield_from(self):
        # Issue 16546: yield from value is not optional.
        empty_yield_from = ast.parse("def f():\n yield from g()")
        empty_yield_from.body[0].body[0].value.value = None
        with self.assertRaises(ValueError) as cm:
            compile(empty_yield_from, "<test>", "exec")
        self.assertIn("field value is required", str(cm.exception))

class ASTHelpers_Test(unittest.TestCase):

def test_parse(self):
        a = ast.parse('foo(1 + 1)')
        b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST)
        self.assertEqual(ast.dump(a), ast.dump(b))

def test_parse_in_error(self):
        try:
            1/0
        except Exception:
            with self.assertRaises(SyntaxError) as e:
                ast.literal_eval(r"'\U'")
            self.assertIsNotNone(e.exception.__context__)

def test_dump(self):
        node = ast.parse('spam(eggs, "and cheese")')
        self.assertEqual(ast.dump(node),
            "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
            "args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], "
            "keywords=[], starargs=None, kwargs=None))])"
        )
        self.assertEqual(ast.dump(node, annotate_fields=False),
            "Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
            "Str('and cheese')], [], None, None))])"
        )
        self.assertEqual(ast.dump(node, include_attributes=True),
            "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
            "lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), "
            "lineno=1, col_offset=5), Str(s='and cheese', lineno=1, "
            "col_offset=11)], keywords=[], starargs=None, kwargs=None, "
            "lineno=1, col_offset=0), lineno=1, col_offset=0)])"
        )

def test_copy_location(self):
        src = ast.parse('1 + 1', mode='eval')
        src.body.right = ast.copy_location(ast.Num(2), src.body.right)
        self.assertEqual(ast.dump(src, include_attributes=True),
            'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), '
            'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, '
            'col_offset=0))'
        )

def test_fix_missing_locations(self):
        src = ast.parse('write("spam")')
        src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()),
                                          [ast.Str('eggs')], [], None, None)))
        self.assertEqual(src, ast.fix_missing_locations(src))
        self.assertEqual(ast.dump(src, include_attributes=True),
            "Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
            "lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, "
            "col_offset=6)], keywords=[], starargs=None, kwargs=None, "
            "lineno=1, col_offset=0), lineno=1, col_offset=0), "
            "Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, "
            "col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], "
            "keywords=[], starargs=None, kwargs=None, lineno=1, "
            "col_offset=0), lineno=1, col_offset=0)])"
        )

def test_increment_lineno(self):
        src = ast.parse('1 + 1', mode='eval')
        self.assertEqual(ast.increment_lineno(src, n=3), src)
        self.assertEqual(ast.dump(src, include_attributes=True),
            'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
            'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
            'col_offset=0))'
        )
        # issue10869: do not increment lineno of root twice
        src = ast.parse('1 + 1', mode='eval')
        self.assertEqual(ast.increment_lineno(src.body, n=3), src.body)
        self.assertEqual(ast.dump(src, include_attributes=True),
            'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
            'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
            'col_offset=0))'
        )

def test_iter_fields(self):
        node = ast.parse('foo()', mode='eval')
        d = dict(ast.iter_fields(node.body))
        self.assertEqual(d.pop('func').id, 'foo')
        self.assertEqual(d, {'keywords': [], 'kwargs': None,
                             'args': [], 'starargs': None})

def test_iter_child_nodes(self):
        node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
        self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
        iterator = ast.iter_child_nodes(node.body)
        self.assertEqual(next(iterator).id, 'spam')
        self.assertEqual(next(iterator).n, 23)
        self.assertEqual(next(iterator).n, 42)
        self.assertEqual(ast.dump(next(iterator)),
            "keyword(arg='eggs', value=Str(s='leek'))"
        )

def test_get_docstring(self):
        node = ast.parse('def foo():\n  """line one\n  line two"""')
        self.assertEqual(ast.get_docstring(node.body[0]),
                         'line one\nline two')

def test_literal_eval(self):
        self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
        self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
        self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None))
        self.assertEqual(ast.literal_eval('{1, 2, 3}'), {1, 2, 3})
        self.assertEqual(ast.literal_eval('b"hi"'), b"hi")
        self.assertRaises(ValueError, ast.literal_eval, 'foo()')
        self.assertEqual(ast.literal_eval('-6'), -6)
        self.assertEqual(ast.literal_eval('-6j+3'), 3-6j)
        self.assertEqual(ast.literal_eval('3.25'), 3.25)

def test_literal_eval_issue4907(self):
        self.assertEqual(ast.literal_eval('2j'), 2j)
        self.assertEqual(ast.literal_eval('10 + 2j'), 10 + 2j)
        self.assertEqual(ast.literal_eval('1.5 - 2j'), 1.5 - 2j)

def test_bad_integer(self):
        # issue13436: Bad error message with invalid numeric values
        body = [ast.ImportFrom(module='time',
                               names=[ast.alias(name='sleep')],
                               level=None,
                               lineno=None, col_offset=None)]
        mod = ast.Module(body)
        with self.assertRaises(ValueError) as cm:
            compile(mod, 'test', 'exec')
        self.assertIn("invalid integer value: None", str(cm.exception))

class ASTValidatorTests(unittest.TestCase):

def mod(self, mod, msg=None, mode="exec", *, exc=ValueError):
        mod.lineno = mod.col_offset = 0
        ast.fix_missing_locations(mod)
        with self.assertRaises(exc) as cm:
            compile(mod, "<test>", mode)
        if msg is not None:
            self.assertIn(msg, str(cm.exception))

def expr(self, node, msg=None, *, exc=ValueError):
        mod = ast.Module([ast.Expr(node)])
        self.mod(mod, msg, exc=exc)

def stmt(self, stmt, msg=None):
        mod = ast.Module([stmt])
        self.mod(mod, msg)

def test_module(self):
        m = ast.Interactive([ast.Expr(ast.Name("x", ast.Store()))])
        self.mod(m, "must have Load context", "single")
        m = ast.Expression(ast.Name("x", ast.Store()))
        self.mod(m, "must have Load context", "eval")

def _check_arguments(self, fac, check):
        def arguments(args=None, vararg=None, varargannotation=None,
                      kwonlyargs=None, kwarg=None, kwargannotation=None,
                      defaults=None, kw_defaults=None):
            if args is None:
                args = []
            if kwonlyargs is None:
                kwonlyargs = []
            if defaults is None:
                defaults = []
            if kw_defaults is None:
                kw_defaults = []
            args = ast.arguments(args, vararg, varargannotation, kwonlyargs,
                                 kwarg, kwargannotation, defaults, kw_defaults)
            return fac(args)
        args = [ast.arg("x", ast.Name("x", ast.Store()))]
        check(arguments(args=args), "must have Load context")
        check(arguments(varargannotation=ast.Num(3)),
              "varargannotation but no vararg")
        check(arguments(varargannotation=ast.Name("x", ast.Store()), vararg="x"),
                         "must have Load context")
        check(arguments(kwonlyargs=args), "must have Load context")
        check(arguments(kwargannotation=ast.Num(42)),
                       "kwargannotation but no kwarg")
        check(arguments(kwargannotation=ast.Name("x", ast.Store()),
                          kwarg="x"), "must have Load context")
        check(arguments(defaults=[ast.Num(3)]),
                       "more positional defaults than args")
        check(arguments(kw_defaults=[ast.Num(4)]),
                       "length of kwonlyargs is not the same as kw_defaults")
        args = [ast.arg("x", ast.Name("x", ast.Load()))]
        check(arguments(args=args, defaults=[ast.Name("x", ast.Store())]),
                       "must have Load context")
        args = [ast.arg("a", ast.Name("x", ast.Load())),
                ast.arg("b", ast.Name("y", ast.Load()))]
        check(arguments(kwonlyargs=args,
                          kw_defaults=[None, ast.Name("x", ast.Store())]),
                          "must have Load context")

def test_funcdef(self):
        a = ast.arguments([], None, None, [], None, None, [], [])
        f = ast.FunctionDef("x", a, [], [], None)
        self.stmt(f, "empty body on FunctionDef")
        f = ast.FunctionDef("x", a, [ast.Pass()], [ast.Name("x", ast.Store())],
                            None)
        self.stmt(f, "must have Load context")
        f = ast.FunctionDef("x", a, [ast.Pass()], [],
                            ast.Name("x", ast.Store()))
        self.stmt(f, "must have Load context")
        def fac(args):
            return ast.FunctionDef("x", args, [ast.Pass()], [], None)
        self._check_arguments(fac, self.stmt)

def test_classdef(self):
        def cls(bases=None, keywords=None, starargs=None, kwargs=None,
                body=None, decorator_list=None):
            if bases is None:
                bases = []
            if keywords is None:
                keywords = []
            if body is None:
                body = [ast.Pass()]
            if decorator_list is None:
                decorator_list = []
            return ast.ClassDef("myclass", bases, keywords, starargs,
                                kwargs, body, decorator_list)
        self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
                  "must have Load context")
        self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
                  "must have Load context")
        self.stmt(cls(starargs=ast.Name("x", ast.Store())),
                  "must have Load context")
        self.stmt(cls(kwargs=ast.Name("x", ast.Store())),
                  "must have Load context")
        self.stmt(cls(body=[]), "empty body on ClassDef")
        self.stmt(cls(body=[None]), "None disallowed")
        self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
                  "must have Load context")

def test_delete(self):
        self.stmt(ast.Delete([]), "empty targets on Delete")
        self.stmt(ast.Delete([None]), "None disallowed")
        self.stmt(ast.Delete([ast.Name("x", ast.Load())]),
                  "must have Del context")

def test_assign(self):
        self.stmt(ast.Assign([], ast.Num(3)), "empty targets on Assign")
        self.stmt(ast.Assign([None], ast.Num(3)), "None disallowed")
        self.stmt(ast.Assign([ast.Name("x", ast.Load())], ast.Num(3)),
                  "must have Store context")
        self.stmt(ast.Assign([ast.Name("x", ast.Store())],
                                ast.Name("y", ast.Store())),
                  "must have Load context")

def test_augassign(self):
        aug = ast.AugAssign(ast.Name("x", ast.Load()), ast.Add(),
                            ast.Name("y", ast.Load()))
        self.stmt(aug, "must have Store context")
        aug = ast.AugAssign(ast.Name("x", ast.Store()), ast.Add(),
                            ast.Name("y", ast.Store()))
        self.stmt(aug, "must have Load context")

def test_for(self):
        x = ast.Name("x", ast.Store())
        y = ast.Name("y", ast.Load())
        p = ast.Pass()
        self.stmt(ast.For(x, y, [], []), "empty body on For")
        self.stmt(ast.For(ast.Name("x", ast.Load()), y, [p], []),
                  "must have Store context")
        self.stmt(ast.For(x, ast.Name("y", ast.Store()), [p], []),
                  "must have Load context")
        e = ast.Expr(ast.Name("x", ast.Store()))
        self.stmt(ast.For(x, y, [e], []), "must have Load context")
        self.stmt(ast.For(x, y, [p], [e]), "must have Load context")

def test_while(self):
        self.stmt(ast.While(ast.Num(3), [], []), "empty body on While")
        self.stmt(ast.While(ast.Name("x", ast.Store()), [ast.Pass()], []),
                  "must have Load context")
        self.stmt(ast.While(ast.Num(3), [ast.Pass()],
                             [ast.Expr(ast.Name("x", ast.Store()))]),
                             "must have Load context")

def test_if(self):
        self.stmt(ast.If(ast.Num(3), [], []), "empty body on If")
        i = ast.If(ast.Name("x", ast.Store()), [ast.Pass()], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Expr(ast.Name("x", ast.Store()))], [])
        self.stmt(i, "must have Load context")
        i = ast.If(ast.Num(3), [ast.Pass()],
                   [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(i, "must have Load context")

def test_with(self):
        p = ast.Pass()
        self.stmt(ast.With([], [p]), "empty items on With")
        i = ast.withitem(ast.Num(3), None)
        self.stmt(ast.With([i], []), "empty body on With")
        i = ast.withitem(ast.Name("x", ast.Store()), None)
        self.stmt(ast.With([i], [p]), "must have Load context")
        i = ast.withitem(ast.Num(3), ast.Name("x", ast.Load()))
        self.stmt(ast.With([i], [p]), "must have Store context")

def test_raise(self):
        r = ast.Raise(None, ast.Num(3))
        self.stmt(r, "Raise with cause but no exception")
        r = ast.Raise(ast.Name("x", ast.Store()), None)
        self.stmt(r, "must have Load context")
        r = ast.Raise(ast.Num(4), ast.Name("x", ast.Store()))
        self.stmt(r, "must have Load context")

def test_try(self):
        p = ast.Pass()
        t = ast.Try([], [], [], [p])
        self.stmt(t, "empty body on Try")
        t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], [], [], [])
        self.stmt(t, "Try has neither except handlers nor finalbody")
        t = ast.Try([p], [], [p], [p])
        self.stmt(t, "Try has orelse but no except handlers")
        t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
        self.stmt(t, "empty body on ExceptHandler")
        e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
        self.stmt(ast.Try([p], e, [], []), "must have Load context")
        e = [ast.ExceptHandler(None, "x", [p])]
        t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
        self.stmt(t, "must have Load context")
        t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
        self.stmt(t, "must have Load context")

def test_assert(self):
        self.stmt(ast.Assert(ast.Name("x", ast.Store()), None),
                  "must have Load context")
        assrt = ast.Assert(ast.Name("x", ast.Load()),
                           ast.Name("y", ast.Store()))
        self.stmt(assrt, "must have Load context")

def test_import(self):
        self.stmt(ast.Import([]), "empty names on Import")

def test_importfrom(self):
        imp = ast.ImportFrom(None, [ast.alias("x", None)], -42)
        self.stmt(imp, "level less than -1")
        self.stmt(ast.ImportFrom(None, [], 0), "empty names on ImportFrom")

def test_global(self):
        self.stmt(ast.Global([]), "empty names on Global")

def test_nonlocal(self):
        self.stmt(ast.Nonlocal([]), "empty names on Nonlocal")

def test_expr(self):
        e = ast.Expr(ast.Name("x", ast.Store()))
        self.stmt(e, "must have Load context")

def test_boolop(self):
        b = ast.BoolOp(ast.And(), [])
        self.expr(b, "less than 2 values")
        b = ast.BoolOp(ast.And(), [ast.Num(3)])
        self.expr(b, "less than 2 values")
        b = ast.BoolOp(ast.And(), [ast.Num(4), None])
        self.expr(b, "None disallowed")
        b = ast.BoolOp(ast.And(), [ast.Num(4), ast.Name("x", ast.Store())])
        self.expr(b, "must have Load context")

def test_unaryop(self):
        u = ast.UnaryOp(ast.Not(), ast.Name("x", ast.Store()))
        self.expr(u, "must have Load context")

def test_lambda(self):
        a = ast.arguments([], None, None, [], None, None, [], [])
        self.expr(ast.Lambda(a, ast.Name("x", ast.Store())),
                  "must have Load context")
        def fac(args):
            return ast.Lambda(args, ast.Name("x", ast.Load()))
        self._check_arguments(fac, self.expr)

def test_ifexp(self):
        l = ast.Name("x", ast.Load())
        s = ast.Name("y", ast.Store())
        for args in (s, l, l), (l, s, l), (l, l, s):
            self.expr(ast.IfExp(*args), "must have Load context")

def test_dict(self):
        d = ast.Dict([], [ast.Name("x", ast.Load())])
        self.expr(d, "same number of keys as values")
        d = ast.Dict([None], [ast.Name("x", ast.Load())])
        self.expr(d, "None disallowed")
        d = ast.Dict([ast.Name("x", ast.Load())], [None])
        self.expr(d, "None disallowed")

def test_set(self):
        self.expr(ast.Set([None]), "None disallowed")
        s = ast.Set([ast.Name("x", ast.Store())])
        self.expr(s, "must have Load context")

def _check_comprehension(self, fac):
        self.expr(fac([]), "comprehension with no generators")
        g = ast.comprehension(ast.Name("x", ast.Load()),
                              ast.Name("x", ast.Load()), [])
        self.expr(fac([g]), "must have Store context")
        g = ast.comprehension(ast.Name("x", ast.Store()),
                              ast.Name("x", ast.Store()), [])
        self.expr(fac([g]), "must have Load context")
        x = ast.Name("x", ast.Store())
        y = ast.Name("y", ast.Load())
        g = ast.comprehension(x, y, [None])
        self.expr(fac([g]), "None disallowed")
        g = ast.comprehension(x, y, [ast.Name("x", ast.Store())])
        self.expr(fac([g]), "must have Load context")

def _simple_comp(self, fac):
        g = ast.comprehension(ast.Name("x", ast.Store()),
                              ast.Name("x", ast.Load()), [])
        self.expr(fac(ast.Name("x", ast.Store()), [g]),
                  "must have Load context")
        def wrap(gens):
            return fac(ast.Name("x", ast.Store()), gens)
        self._check_comprehension(wrap)

def test_listcomp(self):
        self._simple_comp(ast.ListComp)

def test_setcomp(self):
        self._simple_comp(ast.SetComp)

def test_generatorexp(self):
        self._simple_comp(ast.GeneratorExp)

def test_dictcomp(self):
        g = ast.comprehension(ast.Name("y", ast.Store()),
                              ast.Name("p", ast.Load()), [])
        c = ast.DictComp(ast.Name("x", ast.Store()),
                         ast.Name("y", ast.Load()), [g])
        self.expr(c, "must have Load context")
        c = ast.DictComp(ast.Name("x", ast.Load()),
                         ast.Name("y", ast.Store()), [g])
        self.expr(c, "must have Load context")
        def factory(comps):
            k = ast.Name("x", ast.Load())
            v = ast.Name("y", ast.Load())
            return ast.DictComp(k, v, comps)
        self._check_comprehension(factory)

def test_yield(self):
        self.expr(ast.Yield(ast.Name("x", ast.Store())), "must have Load")
        self.expr(ast.YieldFrom(ast.Name("x", ast.Store())), "must have Load")

def test_compare(self):
        left = ast.Name("x", ast.Load())
        comp = ast.Compare(left, [ast.In()], [])
        self.expr(comp, "no comparators")
        comp = ast.Compare(left, [ast.In()], [ast.Num(4), ast.Num(5)])
        self.expr(comp, "different number of comparators and operands")
        comp = ast.Compare(ast.Num("blah"), [ast.In()], [left])
        self.expr(comp, "non-numeric", exc=TypeError)
        comp = ast.Compare(left, [ast.In()], [ast.Num("blah")])
        self.expr(comp, "non-numeric", exc=TypeError)

def test_call(self):
        func = ast.Name("x", ast.Load())
        args = [ast.Name("y", ast.Load())]
        keywords = [ast.keyword("w", ast.Name("z", ast.Load()))]
        stararg = ast.Name("p", ast.Load())
        kwarg = ast.Name("q", ast.Load())
        call = ast.Call(ast.Name("x", ast.Store()), args, keywords, stararg,
                        kwarg)
        self.expr(call, "must have Load context")
        call = ast.Call(func, [None], keywords, stararg, kwarg)
        self.expr(call, "None disallowed")
        bad_keywords = [ast.keyword("w", ast.Name("z", ast.Store()))]
        call = ast.Call(func, args, bad_keywords, stararg, kwarg)
        self.expr(call, "must have Load context")
        call = ast.Call(func, args, keywords, ast.Name("z", ast.Store()), kwarg)
        self.expr(call, "must have Load context")
        call = ast.Call(func, args, keywords, stararg,
                        ast.Name("w", ast.Store()))
        self.expr(call, "must have Load context")

def test_num(self):
        class subint(int):
            pass
        class subfloat(float):
            pass
        class subcomplex(complex):
            pass
        for obj in "0", "hello", subint(), subfloat(), subcomplex():
            self.expr(ast.Num(obj), "non-numeric", exc=TypeError)

def test_attribute(self):
        attr = ast.Attribute(ast.Name("x", ast.Store()), "y", ast.Load())
        self.expr(attr, "must have Load context")

def test_subscript(self):
        sub = ast.Subscript(ast.Name("x", ast.Store()), ast.Index(ast.Num(3)),
                            ast.Load())
        self.expr(sub, "must have Load context")
        x = ast.Name("x", ast.Load())
        sub = ast.Subscript(x, ast.Index(ast.Name("y", ast.Store())),
                            ast.Load())
        self.expr(sub, "must have Load context")
        s = ast.Name("x", ast.Store())
        for args in (s, None, None), (None, s, None), (None, None, s):
            sl = ast.Slice(*args)
            self.expr(ast.Subscript(x, sl, ast.Load()),
                      "must have Load context")
        sl = ast.ExtSlice([])
        self.expr(ast.Subscript(x, sl, ast.Load()), "empty dims on ExtSlice")
        sl = ast.ExtSlice([ast.Index(s)])
        self.expr(ast.Subscript(x, sl, ast.Load()), "must have Load context")

def test_starred(self):
        left = ast.List([ast.Starred(ast.Name("x", ast.Load()), ast.Store())],
                        ast.Store())
        assign = ast.Assign([left], ast.Num(4))
        self.stmt(assign, "must have Store context")

def _sequence(self, fac):
        self.expr(fac([None], ast.Load()), "None disallowed")
        self.expr(fac([ast.Name("x", ast.Store())], ast.Load()),
                  "must have Load context")

def test_list(self):
        self._sequence(ast.List)

def test_tuple(self):
        self._sequence(ast.Tuple)

def test_stdlib_validates(self):
        stdlib = os.path.dirname(ast.__file__)
        tests = [fn for fn in os.listdir(stdlib) if fn.endswith(".py")]
        tests.extend(["test/test_grammar.py", "test/test_unpack_ex.py"])
        for module in tests:
            fn = os.path.join(stdlib, module)
            with open(fn, "r", encoding="utf-8") as fp:
                source = fp.read()
            mod = ast.parse(source)
            compile(mod, fn, "exec")

def test_main():
    support.run_unittest(AST_Tests, ASTHelpers_Test, ASTValidatorTests)

def main():
    if __name__ != '__main__':
        return
    if sys.argv[1:] == ['-g']:
        for statements, kind in ((exec_tests, "exec"), (single_tests, "single"),
                                 (eval_tests, "eval")):
            print(kind+"_results = [")
            for s in statements:
                print(repr(to_tuple(compile(s, "?", kind, 0x400)))+",")
            print("]")
        print("main()")
        raise SystemExit
    test_main()

#### EVERYTHING BELOW IS GENERATED #####
exec_results = [
('Module', [('Expr', (1, 0), ('Name', (1, 0), 'None', ('Load',)))]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], None, None, [], []), [('Pass', (1, 9))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None)], None, None, [], None, None, [], []), [('Pass', (1, 10))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None)], None, None, [], None, None, [('Num', (1, 8), 0)], []), [('Pass', (1, 12))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], 'args', None, [], None, None, [], []), [('Pass', (1, 14))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], 'kwargs', None, [], []), [('Pass', (1, 17))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None), ('arg', 'b', None), ('arg', 'c', None), ('arg', 'd', None), ('arg', 'e', None)], 'args', None, [], 'kwargs', None, [('Num', (1, 11), 1), ('Name', (1, 16), 'None', ('Load',)), ('List', (1, 24), [], ('Load',)), ('Dict', (1, 30), [], [])], []), [('Pass', (1, 52))], [], None)]),
('Module', [('ClassDef', (1, 0), 'C', [], [], None, None, [('Pass', (1, 8))], [])]),
('Module', [('ClassDef', (1, 0), 'C', [('Name', (1, 8), 'object', ('Load',))], [], None, None, [('Pass', (1, 17))], [])]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], None, None, [], []), [('Return', (1, 8), ('Num', (1, 15), 1))], [], None)]),
('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Num', (1, 5), 1))]),
('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Pass', (1, 11))], [])]),
('Module', [('While', (1, 0), ('Name', (1, 6), 'v', ('Load',)), [('Pass', (1, 8))], [])]),
('Module', [('If', (1, 0), ('Name', (1, 3), 'v', ('Load',)), [('Pass', (1, 5))], [])]),
('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',)))], [('Pass', (1, 13))])]),
('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',))), ('withitem', ('Name', (1, 13), 'z', ('Load',)), ('Name', (1, 18), 'q', ('Store',)))], [('Pass', (1, 21))])]),
('Module', [('Raise', (1, 0), ('Call', (1, 6), ('Name', (1, 6), 'Exception', ('Load',)), [('Str', (1, 16), 'string')], [], None, None), None)]),
('Module', [('Try', (1, 0), [('Pass', (2, 2))], [('ExceptHandler', (3, 0), ('Name', (3, 7), 'Exception', ('Load',)), None, [('Pass', (4, 2))])], [], [])]),
('Module', [('Try', (1, 0), [('Pass', (2, 2))], [], [], [('Pass', (4, 2))])]),
('Module', [('Assert', (1, 0), ('Name', (1, 7), 'v', ('Load',)), None)]),
('Module', [('Import', (1, 0), [('alias', 'sys', None)])]),
('Module', [('ImportFrom', (1, 0), 'sys', [('alias', 'v', None)], 0)]),
('Module', [('Global', (1, 0), ['v'])]),
('Module', [('Expr', (1, 0), ('Num', (1, 0), 1))]),
('Module', [('Pass', (1, 0))]),
('Module', [('Break', (1, 0))]),
('Module', [('Continue', (1, 0))]),
('Module', [('For', (1, 0), ('Tuple', (1, 4), [('Name', (1, 4), 'a', ('Store',)), ('Name', (1, 6), 'b', ('Store',))], ('Store',)), ('Name', (1, 11), 'c', ('Load',)), [('Pass', (1, 14))], [])]),
('Module', [('Expr', (1, 0), ('ListComp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 12), [('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 20), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (2, 4), ('Tuple', (3, 4), [('Name', (3, 4), 'Aa', ('Load',)), ('Name', (5, 7), 'Bb', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (8, 4), [('Name', (8, 4), 'Aa', ('Store',)), ('Name', (10, 4), 'Bb', ('Store',))], ('Store',)), ('Name', (10, 10), 'Cc', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('DictComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Name', (1, 11), 'w', ('Store',)), ('Name', (1, 16), 'x', ('Load',)), []), ('comprehension', ('Name', (1, 22), 'm', ('Store',)), ('Name', (1, 27), 'p', ('Load',)), [('Name', (1, 32), 'g', ('Load',))])]))]),
('Module', [('Expr', (1, 0), ('DictComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'v', ('Store',)), ('Name', (1, 13), 'w', ('Store',))], ('Store',)), ('Name', (1, 18), 'x', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 12), 'x', ('Load',)), [('Name', (1, 17), 'g', ('Load',))])]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7), [('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 9), 'm', ('Store',))], ('Store',)), ('Name', (1, 14), 'x', ('Load',)), [])]))]),
]
single_results = [
('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
]
eval_results = [
('Expression', ('Name', (1, 0), 'None', ('Load',))),
('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
('Expression', ('Lambda', (1, 0), ('arguments', [], None, None, [], None, None, [], []), ('Name', (1, 7), 'None', ('Load',)))),
('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
('Expression', ('Dict', (1, 0), [], [])),
('Expression', ('Set', (1, 0), [('Name', (1, 1), 'None', ('Load',))])),
('Expression', ('Dict', (1, 0), [('Num', (2, 6), 1)], [('Num', (4, 10), 2)])),
('Expression', ('ListComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2)], [('keyword', 'c', ('Num', (1, 8), 3))], ('Name', (1, 11), 'd', ('Load',)), ('Name', (1, 15), 'e', ('Load',)))),
('Expression', ('Num', (1, 0), 10)),
('Expression', ('Str', (1, 0), 'string')),
('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),
('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
('Expression', ('Name', (1, 0), 'v', ('Load',))),
('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('List', (1, 0), [], ('Load',))),
('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
('Expression', ('Tuple', (1, 1), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('Tuple', (1, 0), [], ('Load',))),
('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Num', (1, 12), 1), ('Num', (1, 14), 2), None), ('Load',))], [], None, None)),
]
main()