Repository navigation
Expand file tree
/
Copy pathtest_cmd_line.py
More file actions
868 lines (768 loc) · 35.4 KB
/
Copy pathtest_cmd_line.py
File metadata and controls
868 lines (768 loc) · 35.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
# Tests invocation of the interpreter with various command line arguments
# Most tests are executed with environment variables ignored
# See test_cmd_line_script.py for testing of script execution
import os
import subprocess
import sys
import tempfile
import unittest
from test import support
from test.support.script_helper import (
spawn_python, kill_python, assert_python_ok, assert_python_failure,
interpreter_requires_environment
)
# Debug build?
Py_DEBUG = hasattr(sys, "gettotalrefcount")
# XXX (ncoghlan): Move to script_helper and make consistent with run_python
def _kill_python_and_exit_code(p):
data = kill_python(p)
returncode = p.wait()
return data, returncode
class CmdLineTest(unittest.TestCase):
def test_directories(self):
assert_python_failure('.')
assert_python_failure('< .')
def verify_valid_flag(self, cmd_line):
rc, out, err = assert_python_ok(*cmd_line)
self.assertTrue(out == b'' or out.endswith(b'\n'))
self.assertNotIn(b'Traceback', out)
self.assertNotIn(b'Traceback', err)
def test_optimize(self):
self.verify_valid_flag('-O')
self.verify_valid_flag('-OO')
def test_site_flag(self):
self.verify_valid_flag('-S')
def test_usage(self):
rc, out, err = assert_python_ok('-h')
lines = out.splitlines()
self.assertIn(b'usage', lines[0])
# The first line contains the program name,
# but the rest should be ASCII-only
b''.join(lines[1:]).decode('ascii')
def test_version(self):
version = ('Python %d.%d' % sys.version_info[:2]).encode("ascii")
for switch in '-V', '--version', '-VV':
rc, out, err = assert_python_ok(switch)
self.assertFalse(err.startswith(version))
self.assertTrue(out.startswith(version))
def test_verbose(self):
# -v causes imports to write to stderr. If the write to
# stderr itself causes an import to happen (for the output
# codec), a recursion loop can occur.
rc, out, err = assert_python_ok('-v')
self.assertNotIn(b'stack overflow', err)
rc, out, err = assert_python_ok('-vv')
self.assertNotIn(b'stack overflow', err)
@unittest.skipIf(interpreter_requires_environment(),
'Cannot run -E tests when PYTHON env vars are required.')
def test_xoptions(self):
def get_xoptions(*args):
# use subprocess module directly because test.support.script_helper adds
# "-X faulthandler" to the command line
args = (sys.executable, '-E') + args
args += ('-c', 'import sys; print(sys._xoptions)')
out = subprocess.check_output(args)
opts = eval(out.splitlines()[0])
return opts
opts = get_xoptions()
self.assertEqual(opts, {})
opts = get_xoptions('-Xa', '-Xb=c,d=e')
self.assertEqual(opts, {'a': True, 'b': 'c,d=e'})
def test_showrefcount(self):
def run_python(*args):
# this is similar to assert_python_ok but doesn't strip
# the refcount from stderr. It can be replaced once
# assert_python_ok stops doing that.
cmd = [sys.executable]
cmd.extend(args)
PIPE = subprocess.PIPE
p = subprocess.Popen(cmd, stdout=PIPE, stderr=PIPE)
out, err = p.communicate()
p.stdout.close()
p.stderr.close()
rc = p.returncode
self.assertEqual(rc, 0)
return rc, out, err
code = 'import sys; print(sys._xoptions)'
# normally the refcount is hidden
rc, out, err = run_python('-c', code)
self.assertEqual(out.rstrip(), b'{}')
self.assertEqual(err, b'')
# "-X showrefcount" shows the refcount, but only in debug builds
rc, out, err = run_python('-X', 'showrefcount', '-c', code)
self.assertEqual(out.rstrip(), b"{'showrefcount': True}")
if Py_DEBUG:
self.assertRegex(err, br'^\[\d+ refs, \d+ blocks\]')
else:
self.assertEqual(err, b'')
def test_run_module(self):
# Test expected operation of the '-m' switch
# Switch needs an argument
assert_python_failure('-m')
# Check we get an error for a nonexistent module
assert_python_failure('-m', 'fnord43520xyz')
# Check the runpy module also gives an error for
# a nonexistent module
assert_python_failure('-m', 'runpy', 'fnord43520xyz')
# All good if module is located and run successfully
assert_python_ok('-m', 'timeit', '-n', '1')
def test_run_module_bug1764407(self):
# -m and -i need to play well together
# Runs the timeit module and checks the __main__
# namespace has been populated appropriately
p = spawn_python('-i', '-m', 'timeit', '-n', '1')
p.stdin.write(b'Timer\n')
p.stdin.write(b'exit()\n')
data = kill_python(p)
self.assertTrue(data.find(b'1 loop') != -1)
self.assertTrue(data.find(b'__main__.Timer') != -1)
def test_run_code(self):
# Test expected operation of the '-c' switch
# Switch needs an argument
assert_python_failure('-c')
# Check we get an error for an uncaught exception
assert_python_failure('-c', 'raise Exception')
# All good if execution is successful
assert_python_ok('-c', 'pass')
@unittest.skipUnless(support.FS_NONASCII, 'need support.FS_NONASCII')
def test_non_ascii(self):
# Test handling of non-ascii data
command = ("assert(ord(%r) == %s)"
% (support.FS_NONASCII, ord(support.FS_NONASCII)))
assert_python_ok('-c', command)
# On Windows, pass bytes to subprocess doesn't test how Python decodes the
# command line, but how subprocess does decode bytes to unicode. Python
# doesn't decode the command line because Windows provides directly the
# arguments as unicode (using wmain() instead of main()).
@unittest.skipIf(sys.platform == 'win32',
'Windows has a native unicode API')
def test_undecodable_code(self):
undecodable = b"\xff"
env = os.environ.copy()
# Use C locale to get ascii for the locale encoding
env['LC_ALL'] = 'C'
env['PYTHONCOERCECLOCALE'] = '0'
code = (
b'import locale; '
b'print(ascii("' + undecodable + b'"), '
b'locale.getpreferredencoding())')
p = subprocess.Popen(
[sys.executable, "-c", code],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
env=env)
stdout, stderr = p.communicate()
if p.returncode == 1:
# _Py_char2wchar() decoded b'\xff' as '\udcff' (b'\xff' is not
# decodable from ASCII) and run_command() failed on
# PyUnicode_AsUTF8String(). This is the expected behaviour on
# Linux.
pattern = b"Unable to decode the command from the command line:"
elif p.returncode == 0:
# _Py_char2wchar() decoded b'\xff' as '\xff' even if the locale is
# C and the locale encoding is ASCII. It occurs on FreeBSD, Solaris
# and Mac OS X.
pattern = b"'\\xff' "
# The output is followed by the encoding name, an alias to ASCII.
# Examples: "US-ASCII" or "646" (ISO 646, on Solaris).
else:
raise AssertionError("Unknown exit code: %s, output=%a" % (p.returncode, stdout))
if not stdout.startswith(pattern):
raise AssertionError("%a doesn't start with %a" % (stdout, pattern))
@unittest.skipIf(sys.platform == 'win32',
'Windows has a native unicode API')
def test_invalid_utf8_arg(self):
# bpo-35883: Py_DecodeLocale() must escape b'\xfd\xbf\xbf\xbb\xba\xba'
# byte sequence with surrogateescape rather than decoding it as the
# U+7fffbeba character which is outside the [U+0000; U+10ffff] range of
# Python Unicode characters.
#
# Test with default config, in the C locale, in the Python UTF-8 Mode.
code = 'import sys, os; s=os.fsencode(sys.argv[1]); print(ascii(s))'
base_cmd = [sys.executable, '-c', code]
def run_default(arg):
cmd = [sys.executable, '-c', code, arg]
return subprocess.run(cmd, stdout=subprocess.PIPE, text=True)
def run_c_locale(arg):
cmd = [sys.executable, '-c', code, arg]
env = dict(os.environ)
env['LC_ALL'] = 'C'
return subprocess.run(cmd, stdout=subprocess.PIPE,
text=True, env=env)
def run_utf8_mode(arg):
cmd = [sys.executable, '-X', 'utf8', '-c', code, arg]
return subprocess.run(cmd, stdout=subprocess.PIPE, text=True)
valid_utf8 = 'e:\xe9, euro:\u20ac, non-bmp:\U0010ffff'.encode('utf-8')
# invalid UTF-8 byte sequences with a valid UTF-8 sequence
# in the middle.
invalid_utf8 = (
b'\xff' # invalid byte
b'\xc3\xff' # invalid byte sequence
b'\xc3\xa9' # valid utf-8: U+00E9 character
b'\xed\xa0\x80' # lone surrogate character (invalid)
b'\xfd\xbf\xbf\xbb\xba\xba' # character outside [U+0000; U+10ffff]
)
test_args = [valid_utf8, invalid_utf8]
for run_cmd in (run_default, run_c_locale, run_utf8_mode):
with self.subTest(run_cmd=run_cmd):
for arg in test_args:
proc = run_cmd(arg)
self.assertEqual(proc.stdout.rstrip(), ascii(arg))
@unittest.skipUnless((sys.platform == 'darwin' or
support.is_android), 'test specific to Mac OS X and Android')
def test_osx_android_utf8(self):
text = 'e:\xe9, euro:\u20ac, non-bmp:\U0010ffff'.encode('utf-8')
code = "import sys; print(ascii(sys.argv[1]))"
decoded = text.decode('utf-8', 'surrogateescape')
expected = ascii(decoded).encode('ascii') + b'\n'
env = os.environ.copy()
# C locale gives ASCII locale encoding, but Python uses UTF-8
# to parse the command line arguments on Mac OS X and Android.
env['LC_ALL'] = 'C'
p = subprocess.Popen(
(sys.executable, "-c", code, text),
stdout=subprocess.PIPE,
env=env)
stdout, stderr = p.communicate()
self.assertEqual(stdout, expected)
self.assertEqual(p.returncode, 0)
def test_unbuffered_output(self):
# Test expected operation of the '-u' switch
for stream in ('stdout', 'stderr'):
# Binary is unbuffered
code = ("import os, sys; sys.%s.buffer.write(b'x'); os._exit(0)"
% stream)
rc, out, err = assert_python_ok('-u', '-c', code)
data = err if stream == 'stderr' else out
self.assertEqual(data, b'x', "binary %s not unbuffered" % stream)
# Text is unbuffered
code = ("import os, sys; sys.%s.write('x'); os._exit(0)"
% stream)
rc, out, err = assert_python_ok('-u', '-c', code)
data = err if stream == 'stderr' else out
self.assertEqual(data, b'x', "text %s not unbuffered" % stream)
def test_unbuffered_input(self):
# sys.stdin still works with '-u'
code = ("import sys; sys.stdout.write(sys.stdin.read(1))")
p = spawn_python('-u', '-c', code)
p.stdin.write(b'x')
p.stdin.flush()
data, rc = _kill_python_and_exit_code(p)
self.assertEqual(rc, 0)
self.assertTrue(data.startswith(b'x'), data)
def test_large_PYTHONPATH(self):
path1 = "ABCDE" * 100
path2 = "FGHIJ" * 100
path = path1 + os.pathsep + path2
code = """if 1:
import sys
path = ":".join(sys.path)
path = path.encode("ascii", "backslashreplace")
sys.stdout.buffer.write(path)"""
rc, out, err = assert_python_ok('-S', '-c', code,
PYTHONPATH=path)
self.assertIn(path1.encode('ascii'), out)
self.assertIn(path2.encode('ascii'), out)
def test_empty_PYTHONPATH_issue16309(self):
# On Posix, it is documented that setting PATH to the
# empty string is equivalent to not setting PATH at all,
# which is an exception to the rule that in a string like
# "/bin::/usr/bin" the empty string in the middle gets
# interpreted as '.'
code = """if 1:
import sys
path = ":".join(sys.path)
path = path.encode("ascii", "backslashreplace")
sys.stdout.buffer.write(path)"""
rc1, out1, err1 = assert_python_ok('-c', code, PYTHONPATH="")
rc2, out2, err2 = assert_python_ok('-c', code, __isolated=False)
# regarding to Posix specification, outputs should be equal
# for empty and unset PYTHONPATH
self.assertEqual(out1, out2)
def test_displayhook_unencodable(self):
for encoding in ('ascii', 'latin-1', 'utf-8'):
env = os.environ.copy()
env['PYTHONIOENCODING'] = encoding
p = subprocess.Popen(
[sys.executable, '-i'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
env=env)
# non-ascii, surrogate, non-BMP printable, non-BMP unprintable
text = "a=\xe9 b=\uDC80 c=\U00010000 d=\U0010FFFF"
p.stdin.write(ascii(text).encode('ascii') + b"\n")
p.stdin.write(b'exit()\n')
data = kill_python(p)
escaped = repr(text).encode(encoding, 'backslashreplace')
self.assertIn(escaped, data)
def check_input(self, code, expected):
with tempfile.NamedTemporaryFile("wb+") as stdin:
sep = os.linesep.encode('ASCII')
stdin.write(sep.join((b'abc', b'def')))
stdin.flush()
stdin.seek(0)
with subprocess.Popen(
(sys.executable, "-c", code),
stdin=stdin, stdout=subprocess.PIPE) as proc:
stdout, stderr = proc.communicate()
self.assertEqual(stdout.rstrip(), expected)
def test_stdin_readline(self):
# Issue #11272: check that sys.stdin.readline() replaces '\r\n' by '\n'
# on Windows (sys.stdin is opened in binary mode)
self.check_input(
"import sys; print(repr(sys.stdin.readline()))",
b"'abc\\n'")
def test_builtin_input(self):
# Issue #11272: check that input() strips newlines ('\n' or '\r\n')
self.check_input(
"print(repr(input()))",
b"'abc'")
def test_output_newline(self):
# Issue 13119 Newline for print() should be \r\n on Windows.
code = """if 1:
import sys
print(1)
print(2)
print(3, file=sys.stderr)
print(4, file=sys.stderr)"""
rc, out, err = assert_python_ok('-c', code)
if sys.platform == 'win32':
self.assertEqual(b'1\r\n2\r\n', out)
self.assertEqual(b'3\r\n4', err)
else:
self.assertEqual(b'1\n2\n', out)
self.assertEqual(b'3\n4', err)
def test_unmached_quote(self):
# Issue #10206: python program starting with unmatched quote
# spewed spaces to stdout
rc, out, err = assert_python_failure('-c', "'")
self.assertRegex(err.decode('ascii', 'ignore'), 'SyntaxError')
self.assertEqual(b'', out)
def test_stdout_flush_at_shutdown(self):
# Issue #5319: if stdout.flush() fails at shutdown, an error should
# be printed out.
code = """if 1:
import os, sys, test.support
test.support.SuppressCrashReport().__enter__()
sys.stdout.write('x')
os.close(sys.stdout.fileno())"""
rc, out, err = assert_python_failure('-c', code)
self.assertEqual(b'', out)
self.assertEqual(120, rc)
self.assertRegex(err.decode('ascii', 'ignore'),
'Exception ignored in.*\nOSError: .*')
def test_closed_stdout(self):
# Issue #13444: if stdout has been explicitly closed, we should
# not attempt to flush it at shutdown.
code = "import sys; sys.stdout.close()"
rc, out, err = assert_python_ok('-c', code)
self.assertEqual(b'', err)
# Issue #7111: Python should work without standard streams
@unittest.skipIf(os.name != 'posix', "test needs POSIX semantics")
@unittest.skipIf(sys.platform == "vxworks",
"test needs preexec support in subprocess.Popen")
def _test_no_stdio(self, streams):
code = """if 1:
import os, sys
for i, s in enumerate({streams}):
if getattr(sys, s) is not None:
os._exit(i + 1)
os._exit(42)""".format(streams=streams)
def preexec():
if 'stdin' in streams:
os.close(0)
if 'stdout' in streams:
os.close(1)
if 'stderr' in streams:
os.close(2)
p = subprocess.Popen(
[sys.executable, "-E", "-c", code],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
preexec_fn=preexec)
out, err = p.communicate()
self.assertEqual(support.strip_python_stderr(err), b'')
self.assertEqual(p.returncode, 42)
def test_no_stdin(self):
self._test_no_stdio(['stdin'])
def test_no_stdout(self):
self._test_no_stdio(['stdout'])
def test_no_stderr(self):
self._test_no_stdio(['stderr'])
def test_no_std_streams(self):
self._test_no_stdio(['stdin', 'stdout', 'stderr'])
def test_hash_randomization(self):
# Verify that -R enables hash randomization:
self.verify_valid_flag('-R')
hashes = []
if os.environ.get('PYTHONHASHSEED', 'random') != 'random':
env = dict(os.environ) # copy
# We need to test that it is enabled by default without
# the environment variable enabling it for us.
del env['PYTHONHASHSEED']
env['__cleanenv'] = '1' # consumed by assert_python_ok()
else:
env = {}
for i in range(3):
code = 'print(hash("spam"))'
rc, out, err = assert_python_ok('-c', code, **env)
self.assertEqual(rc, 0)
hashes.append(out)
hashes = sorted(set(hashes)) # uniq
# Rare chance of failure due to 3 random seeds honestly being equal.
self.assertGreater(len(hashes), 1,
msg='3 runs produced an identical random hash '
' for "spam": {}'.format(hashes))
# Verify that sys.flags contains hash_randomization
code = 'import sys; print("random is", sys.flags.hash_randomization)'
rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='')
self.assertIn(b'random is 1', out)
rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='random')
self.assertIn(b'random is 1', out)
rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='0')
self.assertIn(b'random is 0', out)
rc, out, err = assert_python_ok('-R', '-c', code, PYTHONHASHSEED='0')
self.assertIn(b'random is 1', out)
def test_del___main__(self):
# Issue #15001: PyRun_SimpleFileExFlags() did crash because it kept a
# borrowed reference to the dict of __main__ module and later modify
# the dict whereas the module was destroyed
filename = support.TESTFN
self.addCleanup(support.unlink, filename)
with open(filename, "w") as script:
print("import sys", file=script)
print("del sys.modules['__main__']", file=script)
assert_python_ok(filename)
def test_unknown_options(self):
rc, out, err = assert_python_failure('-E', '-z')
self.assertIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
self.assertEqual(b'', out)
# Add "without='-E'" to prevent _assert_python to append -E
# to env_vars and change the output of stderr
rc, out, err = assert_python_failure('-z', without='-E')
self.assertIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
self.assertEqual(b'', out)
rc, out, err = assert_python_failure('-a', '-z', without='-E')
self.assertIn(b'Unknown option: -a', err)
# only the first unknown option is reported
self.assertNotIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -a'), 1)
self.assertEqual(b'', out)
@unittest.skipIf(interpreter_requires_environment(),
'Cannot run -I tests when PYTHON env vars are required.')
def test_isolatedmode(self):
self.verify_valid_flag('-I')
self.verify_valid_flag('-IEs')
rc, out, err = assert_python_ok('-I', '-c',
'from sys import flags as f; '
'print(f.no_user_site, f.ignore_environment, f.isolated)',
# dummyvar to prevent extraneous -E
dummyvar="")
self.assertEqual(out.strip(), b'1 1 1')
with support.temp_cwd() as tmpdir:
fake = os.path.join(tmpdir, "uuid.py")
main = os.path.join(tmpdir, "main.py")
with open(fake, "w") as f:
f.write("raise RuntimeError('isolated mode test')\n")
with open(main, "w") as f:
f.write("import uuid\n")
f.write("print('ok')\n")
self.assertRaises(subprocess.CalledProcessError,
subprocess.check_output,
[sys.executable, main], cwd=tmpdir,
stderr=subprocess.DEVNULL)
out = subprocess.check_output([sys.executable, "-I", main],
cwd=tmpdir)
self.assertEqual(out.strip(), b"ok")
def test_sys_flags_set(self):
# Issue 31845: a startup refactoring broke reading flags from env vars
for value, expected in (("", 0), ("1", 1), ("text", 1), ("2", 2)):
env_vars = dict(
PYTHONDEBUG=value,
PYTHONOPTIMIZE=value,
PYTHONDONTWRITEBYTECODE=value,
PYTHONVERBOSE=value,
)
dont_write_bytecode = int(bool(value))
code = (
"import sys; "
"sys.stderr.write(str(sys.flags)); "
f"""sys.exit(not (
sys.flags.debug == sys.flags.optimize ==
sys.flags.verbose ==
{expected}
and sys.flags.dont_write_bytecode == {dont_write_bytecode}
))"""
)
with self.subTest(envar_value=value):
assert_python_ok('-c', code, **env_vars)
def test_set_pycache_prefix(self):
# sys.pycache_prefix can be set from either -X pycache_prefix or
# PYTHONPYCACHEPREFIX env var, with the former taking precedence.
NO_VALUE = object() # `-X pycache_prefix` with no `=PATH`
cases = [
# (PYTHONPYCACHEPREFIX, -X pycache_prefix, sys.pycache_prefix)
(None, None, None),
('foo', None, 'foo'),
(None, 'bar', 'bar'),
('foo', 'bar', 'bar'),
('foo', '', None),
('foo', NO_VALUE, None),
]
for envval, opt, expected in cases:
exp_clause = "is None" if expected is None else f'== "{expected}"'
code = f"import sys; sys.exit(not sys.pycache_prefix {exp_clause})"
args = ['-c', code]
env = {} if envval is None else {'PYTHONPYCACHEPREFIX': envval}
if opt is NO_VALUE:
args[:0] = ['-X', 'pycache_prefix']
elif opt is not None:
args[:0] = ['-X', f'pycache_prefix={opt}']
with self.subTest(envval=envval, opt=opt):
with support.temp_cwd():
assert_python_ok(*args, **env)
def run_xdev(self, *args, check_exitcode=True, xdev=True):
env = dict(os.environ)
env.pop('PYTHONWARNINGS', None)
env.pop('PYTHONDEVMODE', None)
env.pop('PYTHONMALLOC', None)
if xdev:
args = (sys.executable, '-X', 'dev', *args)
else:
args = (sys.executable, *args)
proc = subprocess.run(args,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True,
env=env)
if check_exitcode:
self.assertEqual(proc.returncode, 0, proc)
return proc.stdout.rstrip()
def test_xdev(self):
# sys.flags.dev_mode
code = "import sys; print(sys.flags.dev_mode)"
out = self.run_xdev("-c", code, xdev=False)
self.assertEqual(out, "False")
out = self.run_xdev("-c", code)
self.assertEqual(out, "True")
# Warnings
code = ("import warnings; "
"print(' '.join('%s::%s' % (f[0], f[2].__name__) "
"for f in warnings.filters))")
if Py_DEBUG:
expected_filters = "default::Warning"
else:
expected_filters = ("default::Warning "
"default::DeprecationWarning "
"ignore::DeprecationWarning "
"ignore::PendingDeprecationWarning "
"ignore::ImportWarning "
"ignore::ResourceWarning")
out = self.run_xdev("-c", code)
self.assertEqual(out, expected_filters)
out = self.run_xdev("-b", "-c", code)
self.assertEqual(out, f"default::BytesWarning {expected_filters}")
out = self.run_xdev("-bb", "-c", code)
self.assertEqual(out, f"error::BytesWarning {expected_filters}")
out = self.run_xdev("-Werror", "-c", code)
self.assertEqual(out, f"error::Warning {expected_filters}")
# Memory allocator debug hooks
try:
import _testcapi
except ImportError:
pass
else:
code = "import _testcapi; print(_testcapi.pymem_getallocatorsname())"
with support.SuppressCrashReport():
out = self.run_xdev("-c", code, check_exitcode=False)
if support.with_pymalloc():
alloc_name = "pymalloc_debug"
else:
alloc_name = "malloc_debug"
self.assertEqual(out, alloc_name)
# Faulthandler
try:
import faulthandler
except ImportError:
pass
else:
code = "import faulthandler; print(faulthandler.is_enabled())"
out = self.run_xdev("-c", code)
self.assertEqual(out, "True")
def check_warnings_filters(self, cmdline_option, envvar, use_pywarning=False):
if use_pywarning:
code = ("import sys; from test.support import import_fresh_module; "
"warnings = import_fresh_module('warnings', blocked=['_warnings']); ")
else:
code = "import sys, warnings; "
code += ("print(' '.join('%s::%s' % (f[0], f[2].__name__) "
"for f in warnings.filters))")
args = (sys.executable, '-W', cmdline_option, '-bb', '-c', code)
env = dict(os.environ)
env.pop('PYTHONDEVMODE', None)
env["PYTHONWARNINGS"] = envvar
proc = subprocess.run(args,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True,
env=env)
self.assertEqual(proc.returncode, 0, proc)
return proc.stdout.rstrip()
def test_warnings_filter_precedence(self):
expected_filters = ("error::BytesWarning "
"once::UserWarning "
"always::UserWarning")
if not Py_DEBUG:
expected_filters += (" "
"default::DeprecationWarning "
"ignore::DeprecationWarning "
"ignore::PendingDeprecationWarning "
"ignore::ImportWarning "
"ignore::ResourceWarning")
out = self.check_warnings_filters("once::UserWarning",
"always::UserWarning")
self.assertEqual(out, expected_filters)
out = self.check_warnings_filters("once::UserWarning",
"always::UserWarning",
use_pywarning=True)
self.assertEqual(out, expected_filters)
def check_pythonmalloc(self, env_var, name):
code = 'import _testcapi; print(_testcapi.pymem_getallocatorsname())'
env = dict(os.environ)
env.pop('PYTHONDEVMODE', None)
if env_var is not None:
env['PYTHONMALLOC'] = env_var
else:
env.pop('PYTHONMALLOC', None)
args = (sys.executable, '-c', code)
proc = subprocess.run(args,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True,
env=env)
self.assertEqual(proc.stdout.rstrip(), name)
self.assertEqual(proc.returncode, 0)
def test_pythonmalloc(self):
# Test the PYTHONMALLOC environment variable
pymalloc = support.with_pymalloc()
if pymalloc:
default_name = 'pymalloc_debug' if Py_DEBUG else 'pymalloc'
default_name_debug = 'pymalloc_debug'
else:
default_name = 'malloc_debug' if Py_DEBUG else 'malloc'
default_name_debug = 'malloc_debug'
tests = [
(None, default_name),
('debug', default_name_debug),
('malloc', 'malloc'),
('malloc_debug', 'malloc_debug'),
]
if pymalloc:
tests.extend((
('pymalloc', 'pymalloc'),
('pymalloc_debug', 'pymalloc_debug'),
))
for env_var, name in tests:
with self.subTest(env_var=env_var, name=name):
self.check_pythonmalloc(env_var, name)
def test_pythondevmode_env(self):
# Test the PYTHONDEVMODE environment variable
code = "import sys; print(sys.flags.dev_mode)"
env = dict(os.environ)
env.pop('PYTHONDEVMODE', None)
args = (sys.executable, '-c', code)
proc = subprocess.run(args, stdout=subprocess.PIPE,
universal_newlines=True, env=env)
self.assertEqual(proc.stdout.rstrip(), 'False')
self.assertEqual(proc.returncode, 0, proc)
env['PYTHONDEVMODE'] = '1'
proc = subprocess.run(args, stdout=subprocess.PIPE,
universal_newlines=True, env=env)
self.assertEqual(proc.stdout.rstrip(), 'True')
self.assertEqual(proc.returncode, 0, proc)
@unittest.skipUnless(sys.platform == 'win32',
'bpo-32457 only applies on Windows')
def test_argv0_normalization(self):
args = sys.executable, '-c', 'print(0)'
prefix, exe = os.path.split(sys.executable)
executable = prefix + '\\.\\.\\.\\' + exe
proc = subprocess.run(args, stdout=subprocess.PIPE,
executable=executable)
self.assertEqual(proc.returncode, 0, proc)
self.assertEqual(proc.stdout.strip(), b'0')
def test_parsing_error(self):
args = [sys.executable, '-I', '--unknown-option']
proc = subprocess.run(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True)
err_msg = "unknown option --unknown-option\nusage: "
self.assertTrue(proc.stderr.startswith(err_msg), proc.stderr)
self.assertNotEqual(proc.returncode, 0)
def test_int_max_str_digits(self):
code = "import sys; print(sys.flags.int_max_str_digits, sys.get_int_max_str_digits())"
assert_python_failure('-X', 'int_max_str_digits', '-c', code)
assert_python_failure('-X', 'int_max_str_digits=foo', '-c', code)
assert_python_failure('-X', 'int_max_str_digits=100', '-c', code)
assert_python_failure('-X', 'int_max_str_digits', '-c', code,
PYTHONINTMAXSTRDIGITS='4000')
assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='foo')
assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='100')
def res2int(res):
out = res.out.strip().decode("utf-8")
return tuple(int(i) for i in out.split())
res = assert_python_ok('-c', code)
self.assertEqual(res2int(res), (-1, sys.get_int_max_str_digits()))
res = assert_python_ok('-X', 'int_max_str_digits=0', '-c', code)
self.assertEqual(res2int(res), (0, 0))
res = assert_python_ok('-X', 'int_max_str_digits=4000', '-c', code)
self.assertEqual(res2int(res), (4000, 4000))
res = assert_python_ok('-X', 'int_max_str_digits=100000', '-c', code)
self.assertEqual(res2int(res), (100000, 100000))
res = assert_python_ok('-c', code, PYTHONINTMAXSTRDIGITS='0')
self.assertEqual(res2int(res), (0, 0))
res = assert_python_ok('-c', code, PYTHONINTMAXSTRDIGITS='4000')
self.assertEqual(res2int(res), (4000, 4000))
res = assert_python_ok(
'-X', 'int_max_str_digits=6000', '-c', code,
PYTHONINTMAXSTRDIGITS='4000'
)
self.assertEqual(res2int(res), (6000, 6000))
@unittest.skipIf(interpreter_requires_environment(),
'Cannot run -I tests when PYTHON env vars are required.')
class IgnoreEnvironmentTest(unittest.TestCase):
def run_ignoring_vars(self, predicate, **env_vars):
# Runs a subprocess with -E set, even though we're passing
# specific environment variables
# Logical inversion to match predicate check to a zero return
# code indicating success
code = "import sys; sys.stderr.write(str(sys.flags)); sys.exit(not ({}))".format(predicate)
return assert_python_ok('-E', '-c', code, **env_vars)
def test_ignore_PYTHONPATH(self):
path = "should_be_ignored"
self.run_ignoring_vars("'{}' not in sys.path".format(path),
PYTHONPATH=path)
def test_ignore_PYTHONHASHSEED(self):
self.run_ignoring_vars("sys.flags.hash_randomization == 1",
PYTHONHASHSEED="0")
def test_sys_flags_not_set(self):
# Issue 31845: a startup refactoring broke reading flags from env vars
expected_outcome = """
(sys.flags.debug == sys.flags.optimize ==
sys.flags.dont_write_bytecode == sys.flags.verbose == 0)
"""
self.run_ignoring_vars(
expected_outcome,
PYTHONDEBUG="1",
PYTHONOPTIMIZE="1",
PYTHONDONTWRITEBYTECODE="1",
PYTHONVERBOSE="1",
)
def test_main():
support.run_unittest(CmdLineTest, IgnoreEnvironmentTest)
support.reap_children()
if __name__ == "__main__":
test_main()