File: autotest.py

package info (click to toggle)
chromium 138.0.7204.157-1
  • links: PTS, VCS
  • area: main
  • in suites: sid, trixie
  • size: 6,071,864 kB
  • sloc: cpp: 34,936,859; ansic: 7,176,967; javascript: 4,110,704; python: 1,419,953; asm: 946,768; xml: 739,967; pascal: 187,324; sh: 89,623; perl: 88,663; objc: 79,944; sql: 50,304; cs: 41,786; fortran: 24,137; makefile: 21,806; php: 13,980; tcl: 13,166; yacc: 8,925; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (699 lines) | stat: -rwxr-xr-x 25,930 bytes parent folder | download | duplicates (2)
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
#!/usr/bin/env python3
# Copyright 2020 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Builds and runs a test by filename.

This script finds the appropriate test suites for the specified test files or
directories, builds it, then runs it with the (optionally) specified filter,
passing any extra args on to the test runner.

Examples:
# Run the test target for bit_cast_unittest.cc. Use a custom test filter instead
# of the automatically generated one.
autotest.py -C out/Desktop bit_cast_unittest.cc --gtest_filter=BitCastTest*

# Find and run UrlUtilitiesUnitTest.java's tests, pass remaining parameters to
# the test binary.
autotest.py -C out/Android UrlUtilitiesUnitTest --fast-local-dev -v

# Run all tests under base/strings.
autotest.py -C out/foo --run-all base/strings

# Run tests in multiple files or directories.
autotest.py -C out/foo base/strings base/pickle_unittest.cc

# Run only the test on line 11. Useful when running autotest.py from your text
# editor.
autotest.py -C out/foo --line 11 base/strings/strcat_unittest.cc
"""

import argparse
import json
import locale
import os
import re
import shlex
import subprocess
import sys

from enum import Enum
from pathlib import Path

# Don't write pyc files to the src tree, which show up in version control
# in some environments.
sys.dont_write_bytecode = True

USE_PYTHON_3 = f'This script will only run under python3.'

SRC_DIR = Path(__file__).parent.parent.resolve()
sys.path.append(str(SRC_DIR / 'build'))
import gn_helpers

sys.path.append(str(SRC_DIR / 'build' / 'android'))
from pylib import constants

DEPOT_TOOLS_DIR = SRC_DIR / 'third_party' / 'depot_tools'
DEBUG = False

# Some test suites use suffixes that would also match non-test-suite targets.
# Those test suites should be manually added here.
_TEST_TARGET_ALLOWLIST = [

    # The tests below this line were output from the ripgrep command just below:
    '//ash:ash_pixeltests',
    '//build/rust/tests/test_serde_json_lenient:test_serde_json_lenient',
    '//chrome/browser/apps/app_service/app_install:app_install_fuzztests',
    '//chrome/browser/glic/e2e_test:glic_internal_e2e_interactive_ui_tests',
    '//chrome/browser/mac:install_sh_test',
    '//chrome/browser/metrics/perf:profile_provider_unittest',
    '//chrome/browser/privacy_sandbox/notice:fuzz_tests',
    '//chrome/browser/web_applications:web_application_fuzztests',
    '//chromecast/media/base:video_plane_controller_test',
    '//chromecast/metrics:cast_metrics_unittest',
    '//chromecast/starboard/media/cdm:starboard_decryptor_cast_test',
    '//chromecast/starboard/media/cdm:starboard_drm_key_tracker_test',
    '//chromecast/starboard/media/cdm:starboard_drm_wrapper_test',
    '//chromecast/starboard/media/media:media_pipeline_backend_starboard_test',
    '//chromecast/starboard/media/media:mime_utils_test',
    '//chromecast/starboard/media/media:starboard_audio_decoder_test',
    '//chromecast/starboard/media/media:starboard_resampler_test',
    '//chromecast/starboard/media/media:starboard_video_decoder_test',
    '//chromecast/starboard/media/media:starboard_video_plane_test',
    '//chrome/enterprise_companion:enterprise_companion_integration_tests',
    '//chrome/enterprise_companion:enterprise_companion_tests',
    '//chrome/installer/gcapi:gcapi_test',
    '//chrome/installer/test:upgrade_test',
    '//chromeos/ash/components/kiosk/vision:kiosk_vision_unit_tests',
    '//chrome/test/android:chrome_public_apk_baseline_profile_generator',
    '//chrome/test:unit_tests',
    '//clank/javatests:chrome_apk_baseline_profile_generator',
    '//clank/javatests:chrome_smoke_test',
    '//clank/javatests:monochrome_bundle_smoke_test',
    '//clank/javatests:trichrome_chrome_google_bundle_smoke_test',
    '//components/chromeos_camera:jpeg_decode_accelerator_unittest',
    '//components/exo/wayland:wayland_client_compatibility_tests',
    '//components/exo/wayland:wayland_client_tests',
    '//components/facilitated_payments/core/validation:pix_code_validator_fuzzer',
    '//components/ip_protection:components_ip_protection_fuzztests',
    '//components/minidump_uploader:minidump_uploader_test',
    '//components/paint_preview/browser:paint_preview_browser_unit_tests',
    '//components/paint_preview/common:paint_preview_common_unit_tests',
    '//components/paint_preview/renderer:paint_preview_renderer_unit_tests',
    '//components/services/paint_preview_compositor:paint_preview_compositor_unit_tests',
    '//components/translate/core/language_detection:language_detection_util_fuzztest',
    '//components/webcrypto:webcrypto_testing_fuzzer',
    '//components/zucchini:zucchini_integration_test',
    '//content/test/fuzzer:devtools_protocol_encoding_json_fuzzer',
    '//fuchsia_web/runners:cast_runner_integration_tests',
    '//fuchsia_web/webengine:web_engine_integration_tests',
    '//google_apis/gcm:gcm_unit_tests',
    '//gpu:gl_tests',
    '//gpu:gpu_benchmark',
    '//gpu/vulkan/android:vk_tests',
    '//ios/web:ios_web_inttests',
    '//ios/web_view:ios_web_view_inttests',
    '//media/cdm:aes_decryptor_fuzztests',
    '//media/formats:ac3_util_fuzzer',
    '//media/gpu/chromeos:image_processor_test',
    '//media/gpu/v4l2:v4l2_unittest',
    '//media/gpu/vaapi/test/fake_libva_driver:fake_libva_driver_unittest',
    '//media/gpu/vaapi:vaapi_unittest',
    '//native_client/tests:large_tests',
    '//native_client/tests:medium_tests',
    '//native_client/tests:small_tests',
    '//sandbox/mac:sandbox_mac_fuzztests',
    '//sandbox/win:sbox_integration_tests',
    '//sandbox/win:sbox_validation_tests',
    '//testing/libfuzzer/fuzzers:libyuv_scale_fuzztest',
    '//testing/libfuzzer/fuzzers:paint_vector_icon_fuzztest',
    '//third_party/blink/renderer/controller:blink_perf_tests',
    '//third_party/blink/renderer/core:css_parser_fuzzer',
    '//third_party/blink/renderer/core:inspector_ghost_rules_fuzzer',
    '//third_party/blink/renderer/platform/loader:unencoded_digest_fuzzer',
    '//third_party/crc32c:crc32c_benchmark',
    '//third_party/crc32c:crc32c_tests',
    '//third_party/dawn/src/dawn/tests/benchmarks:dawn_benchmarks',
    '//third_party/highway:highway_tests',
    '//third_party/ipcz/src:ipcz_tests',
    '//third_party/libaom:av1_encoder_fuzz_test',
    '//third_party/libaom:test_libaom',
    '//third_party/libvpx:test_libvpx',
    '//third_party/libvpx:vp8_encoder_fuzz_test',
    '//third_party/libvpx:vp9_encoder_fuzz_test',
    '//third_party/libwebp:libwebp_advanced_api_fuzzer',
    '//third_party/libwebp:libwebp_animation_api_fuzzer',
    '//third_party/libwebp:libwebp_animencoder_fuzzer',
    '//third_party/libwebp:libwebp_enc_dec_api_fuzzer',
    '//third_party/libwebp:libwebp_huffman_fuzzer',
    '//third_party/libwebp:libwebp_mux_demux_api_fuzzer',
    '//third_party/libwebp:libwebp_simple_api_fuzzer',
    '//third_party/opus:test_opus_api',
    '//third_party/opus:test_opus_decode',
    '//third_party/opus:test_opus_encode',
    '//third_party/opus:test_opus_padding',
    '//third_party/pdfium:pdfium_embeddertests',
    '//third_party/pffft:pffft_unittest',
    '//third_party/rapidhash:rapidhash_fuzztests',
    '//ui/ozone:ozone_integration_tests',
]
r"""
 You can run this command to find test targets that do not match these regexes,
 and use it to update _TEST_TARGET_ALLOWLIST.
rg '^(instrumentation_test_runner|test)\("([^"]*)' -o -g'BUILD.gn' -r'$2' -N \
  | rg -v '(_browsertests|_perftests|_wpr_tests|_unittests)$' \
  | rg '^(.*)/BUILD.gn(.*)$' -r'\'//$1$2\',' \
  | sort

 And you can use a command like this to find source_set targets that do match
 the test target regex (ideally this is minimal).
rg '^source_set\("([^"]*)' -o -g'BUILD.gn' -r'$1' -N | \
  rg '(_browsertests|_perftests|_wpr_tests|_unittests)$'
"""
_TEST_TARGET_REGEX = re.compile(
    r'(_browsertests|_perftests|_wpr_tests|_unittests)$')

_PREF_MAPPING_FILE_PATTERN = re.escape(
    str(Path('components') / 'policy' / 'test' / 'data' / 'pref_mapping') +
    r'/') + r'.*\.json'

TEST_FILE_NAME_REGEX = re.compile(
    r'(.*Test\.java)' +
    r'|(.*_[a-z]*test(?:_win|_mac|_linux|_chromeos|_android)?\.cc)' + r'|(' +
    _PREF_MAPPING_FILE_PATTERN + r')')

# Some tests don't directly include gtest.h and instead include it via gmock.h
# or a test_utils.h file, so make sure these cases are captured. Also include
# files that use <...> for #includes instead of quotes.
GTEST_INCLUDE_REGEX = re.compile(
    r'#include.*(gtest|gmock|_test_utils|browser_test)\.h("|>)')


def ExitWithMessage(*args):
  print(*args, file=sys.stderr)
  sys.exit(1)


class TestValidity(Enum):
  NOT_A_TEST = 0  # Does not match test file regex.
  MAYBE_A_TEST = 1  # Matches test file regex, but doesn't include gtest files.
  VALID_TEST = 2  # Matches test file regex and includes gtest files.


def IsTestFile(file_path):
  if not TEST_FILE_NAME_REGEX.match(file_path):
    return TestValidity.NOT_A_TEST
  if file_path.endswith('.cc'):
    # Try a bit harder to remove non-test files for c++. Without this,
    # 'autotest.py base/' finds non-test files.
    try:
      with open(file_path, 'r', encoding='utf-8') as f:
        if GTEST_INCLUDE_REGEX.search(f.read()) is not None:
          return TestValidity.VALID_TEST
    except IOError:
      pass
    # It may still be a test file, even if it doesn't include a gtest file.
    return TestValidity.MAYBE_A_TEST
  return TestValidity.VALID_TEST


class CommandError(Exception):
  """Exception thrown when a subcommand fails."""

  def __init__(self, command, return_code, output=None):
    Exception.__init__(self)
    self.command = command
    self.return_code = return_code
    self.output = output

  def __str__(self):
    message = (f'\n***\nERROR: Error while running command {self.command}'
               f'.\nExit status: {self.return_code}\n')
    if self.output:
      message += f'Output:\n{self.output}\n'
    message += '***'
    return message


def StreamCommandOrExit(cmd, **kwargs):
  try:
    subprocess.check_call(cmd, **kwargs)
  except subprocess.CalledProcessError as e:
    sys.exit(1)


def RunCommand(cmd, **kwargs):
  try:
    # Set an encoding to convert the binary output to a string.
    return subprocess.check_output(
        cmd, **kwargs, encoding=locale.getpreferredencoding())
  except subprocess.CalledProcessError as e:
    raise CommandError(e.cmd, e.returncode, e.output) from None


def BuildTestTargets(out_dir, targets, dry_run):
  """Builds the specified targets with ninja"""
  cmd = gn_helpers.CreateBuildCommand(out_dir) + targets
  print('Building: ' + shlex.join(cmd))
  if (dry_run):
    return True
  try:
    subprocess.check_call(cmd)
  except subprocess.CalledProcessError as e:
    return False
  return True


def RecursiveMatchFilename(folder, filename):
  current_dir = os.path.split(folder)[-1]
  if current_dir.startswith('out') or current_dir.startswith('.'):
    return [[], []]
  exact = []
  close = []
  try:
    with os.scandir(folder) as it:
      for entry in it:
        if (entry.is_symlink()):
          continue
        if (entry.is_file() and filename in entry.path and
            not os.path.basename(entry.path).startswith('.')):
          file_validity = IsTestFile(entry.path)
          if file_validity is TestValidity.VALID_TEST:
            exact.append(entry.path)
          elif file_validity is TestValidity.MAYBE_A_TEST:
            close.append(entry.path)
        if entry.is_dir():
          # On Windows, junctions are like a symlink that python interprets as a
          # directory, leading to exceptions being thrown. We can just catch and
          # ignore these exceptions like we would ignore symlinks.
          try:
            matches = RecursiveMatchFilename(entry.path, filename)
            exact += matches[0]
            close += matches[1]
          except FileNotFoundError as e:
            if DEBUG:
              print(f'Failed to scan directory "{entry}" - junction?')
            pass
  except PermissionError:
    print(f'Permission error while scanning {folder}')

  return [exact, close]


def FindTestFilesInDirectory(directory):
  test_files = []
  if DEBUG:
    print('Test files:')
  for root, _, files in os.walk(directory):
    for f in files:
      path = os.path.join(root, f)
      file_validity = IsTestFile(path)
      if file_validity is TestValidity.VALID_TEST:
        if DEBUG:
          print(path)
        test_files.append(path)
      elif DEBUG and file_validity is TestValidity.MAYBE_A_TEST:
        print(path + ' matched but doesn\'t include gtest files, skipping.')
  return test_files


def FindMatchingTestFiles(target):
  # Return early if there's an exact file match.
  if os.path.isfile(target):
    # If the target is a C++ implementation file, try to guess the test file.
    if target.endswith('.cc') or target.endswith('.h'):
      target_validity = IsTestFile(target)
      if target_validity is TestValidity.VALID_TEST:
        return [target]
      alternate = f"{target.rsplit('.', 1)[0]}_unittest.cc"
      alt_validity = TestValidity.NOT_A_TEST if not os.path.isfile(
          alternate) else IsTestFile(alternate)
      if alt_validity is TestValidity.VALID_TEST:
        return [alternate]

      # If neither the target nor its alternative were valid, check if they just
      # didn't include the gtest files before deciding to exit.
      if target_validity is TestValidity.MAYBE_A_TEST:
        return [target]
      if alt_validity is TestValidity.MAYBE_A_TEST:
        return [alternate]
      ExitWithMessage(f"{target} doesn't look like a test file")
    return [target]
  # If this is a directory, return all the test files it contains.
  if os.path.isdir(target):
    files = FindTestFilesInDirectory(target)
    if not files:
      ExitWithMessage('No tests found in directory')
    return files

  if sys.platform.startswith('win32') and os.path.altsep in target:
    # Use backslash as the path separator on Windows to match os.scandir().
    if DEBUG:
      print('Replacing ' + os.path.altsep + ' with ' + os.path.sep + ' in: '
            + target)
    target = target.replace(os.path.altsep, os.path.sep)
  if DEBUG:
    print('Finding files with full path containing: ' + target)

  [exact, close] = RecursiveMatchFilename(SRC_DIR, target)
  if DEBUG:
    if exact:
      print('Found exact matching file(s):')
      print('\n'.join(exact))
    if close:
      print('Found possible matching file(s):')
      print('\n'.join(close))

  if len(exact) >= 1:
    # Given "Foo", don't ask to disambiguate ModFoo.java vs Foo.java.
    more_exact = [
        p for p in exact if os.path.basename(p) in (target, f'{target}.java')
    ]
    if len(more_exact) == 1:
      test_files = more_exact
    else:
      test_files = exact
  else:
    test_files = close

  if len(test_files) > 1:
    if len(test_files) < 10:
      test_files = [HaveUserPickFile(test_files)]
    else:
      # Arbitrarily capping at 10 results so we don't print the name of every
      # file in the repo if the target is poorly specified.
      test_files = test_files[:10]
      ExitWithMessage(f'Target "{target}" is ambiguous. Matching files: '
                      f'{test_files}')
  if not test_files:
    ExitWithMessage(f'Target "{target}" did not match any files.')
  return test_files


def HaveUserPickFile(paths):
  paths = sorted(paths, key=lambda p: (len(p), p))
  path_list = '\n'.join(f'{i}. {t}' for i, t in enumerate(paths))

  while True:
    user_input = input(f'Please choose the path you mean.\n{path_list}\n')
    try:
      value = int(user_input)
      return paths[value]
    except (ValueError, IndexError):
      print('Try again')


def HaveUserPickTarget(paths, targets):
  # Cap to 10 targets for convenience [0-9].
  targets = targets[:10]
  target_list = '\n'.join(f'{i}. {t}' for i, t in enumerate(targets))

  user_input = input(f'Target "{paths}" is used by multiple test targets.\n' +
                     target_list + '\nPlease pick a target by its numeric index'
                     'listed below: ')
  try:
    value = int(user_input)
    return targets[value]
  except (ValueError, IndexError):
    print('Value entered was not a numeric index listed above. Trying again.')
    return HaveUserPickTarget(paths, targets)


# A persistent cache to avoid running gn on repeated runs of autotest.
class TargetCache:
  def __init__(self, out_dir):
    self.out_dir = out_dir
    self.path = os.path.join(out_dir, 'autotest_cache')
    self.gold_mtime = self.GetBuildNinjaMtime()
    self.cache = {}
    try:
      mtime, cache = json.load(open(self.path, 'r'))
      if mtime == self.gold_mtime:
        self.cache = cache
    except Exception:
      pass

  def Save(self):
    with open(self.path, 'w') as f:
      json.dump([self.gold_mtime, self.cache], f)

  def Find(self, test_paths):
    key = ' '.join(test_paths)
    return self.cache.get(key, None)

  def Store(self, test_paths, test_targets):
    key = ' '.join(test_paths)
    self.cache[key] = test_targets

  def GetBuildNinjaMtime(self):
    return os.path.getmtime(os.path.join(self.out_dir, 'build.ninja'))

  def IsStillValid(self):
    return self.GetBuildNinjaMtime() == self.gold_mtime


def _TestTargetsFromGnRefs(targets):
  # First apply allowlists:
  ret = [t for t in targets if '__' not in t]
  ret = [
      t for t in ret
      if _TEST_TARGET_REGEX.search(t) or t in _TEST_TARGET_ALLOWLIST
  ]
  if ret:
    return ret

  _SUBTARGET_SUFFIXES = (
      '__java_binary',  # robolectric_binary()
      '__test_runner_script',  # test() targets
      '__test_apk',  # instrumentation_test_apk() targets
  )
  ret = []
  for suffix in _SUBTARGET_SUFFIXES:
    ret.extend(t[:-len(suffix)] for t in targets if t.endswith(suffix))

  return ret


def FindTestTargets(target_cache, out_dir, paths, run_all):
  # Normalize paths, so they can be cached.
  paths = [os.path.realpath(p) for p in paths]
  test_targets = target_cache.Find(paths)
  used_cache = True
  if not test_targets:
    used_cache = False

    # Use gn refs to recursively find all targets that depend on |path|, filter
    # internal gn targets, and match against well-known test suffixes, falling
    # back to a list of known test targets if that fails.
    gn_path = os.path.join(DEPOT_TOOLS_DIR, 'gn.py')

    cmd = [sys.executable, gn_path, 'refs', out_dir, '--all'] + paths
    targets = RunCommand(cmd).splitlines()
    test_targets = _TestTargetsFromGnRefs(targets)

    # If not targets were identified as tests by looking at their names, ask GN
    # if any are executables.
    if not test_targets and targets:
      test_targets = RunCommand(cmd + ['--type=executable']).splitlines()

  if not test_targets:
    ExitWithMessage(
        f'"{paths}" did not match any test targets. Consider adding'
        f' one of the following targets to _TEST_TARGET_ALLOWLIST within '
        f'{__file__}: \n' + '\n'.join(targets))

  test_targets.sort()
  target_cache.Store(paths, test_targets)
  target_cache.Save()

  if len(test_targets) > 1:
    if run_all:
      print(f'Warning, found {len(test_targets)} test targets.',
            file=sys.stderr)
      if len(test_targets) > 10:
        ExitWithMessage('Your query likely involves non-test sources.')
      print('Trying to run all of them!', file=sys.stderr)
    else:
      test_targets = [HaveUserPickTarget(paths, test_targets)]

  # Remove the // prefix to turn GN label into ninja target.
  test_targets = [t[2:] for t in test_targets]

  return (test_targets, used_cache)


def RunTestTargets(out_dir, targets, gtest_filter, pref_mapping_filter,
                   extra_args, dry_run, no_try_android_wrappers,
                   no_fast_local_dev):

  for target in targets:
    target_binary = target.split(':')[1]

    # Look for the Android wrapper script first.
    path = os.path.join(out_dir, 'bin', f'run_{target_binary}')
    if no_try_android_wrappers or not os.path.isfile(path):
      # If the wrapper is not found or disabled use the Desktop target
      # which is an executable.
      path = os.path.join(out_dir, target_binary)
    elif not no_fast_local_dev:
      # Usually want this flag when developing locally.
      extra_args = extra_args + ['--fast-local-dev']

    cmd = [path, f'--gtest_filter={gtest_filter}']
    if pref_mapping_filter:
      cmd.append(f'--test_policy_to_pref_mappings_filter={pref_mapping_filter}')
    cmd.extend(extra_args)

    print('Running test: ' + shlex.join(cmd))
    if not dry_run:
      StreamCommandOrExit(cmd)


def BuildCppTestFilter(filenames, line):
  make_filter_command = [
      sys.executable, SRC_DIR / 'tools' / 'make_gtest_filter.py'
  ]
  if line:
    make_filter_command += ['--line', str(line)]
  else:
    make_filter_command += ['--class-only']
  make_filter_command += filenames
  return RunCommand(make_filter_command).strip()


def BuildJavaTestFilter(filenames):
  return ':'.join('*.{}*'.format(os.path.splitext(os.path.basename(f))[0])
                  for f in filenames)


_PREF_MAPPING_GTEST_FILTER = '*PolicyPrefsTest.PolicyToPrefsMapping*'

_PREF_MAPPING_FILE_REGEX = re.compile(_PREF_MAPPING_FILE_PATTERN)

SPECIAL_TEST_FILTERS = [(_PREF_MAPPING_FILE_REGEX, _PREF_MAPPING_GTEST_FILTER)]


def BuildTestFilter(filenames, line):
  java_files = [f for f in filenames if f.endswith('.java')]
  cc_files = [f for f in filenames if f.endswith('.cc')]
  filters = []
  if java_files:
    filters.append(BuildJavaTestFilter(java_files))
  if cc_files:
    filters.append(BuildCppTestFilter(cc_files, line))
  for regex, gtest_filter in SPECIAL_TEST_FILTERS:
    if any(True for f in filenames if regex.match(f)):
      filters.append(gtest_filter)
      break
  return ':'.join(filters)


def BuildPrefMappingTestFilter(filenames):
  mapping_files = [f for f in filenames if _PREF_MAPPING_FILE_REGEX.match(f)]
  if not mapping_files:
    return None
  names_without_extension = [Path(f).stem for f in mapping_files]
  return ':'.join(names_without_extension)


def main():
  parser = argparse.ArgumentParser(
      description=__doc__, formatter_class=argparse.RawTextHelpFormatter)
  parser.add_argument('--out-dir',
                      '--out_dir',
                      '--output-directory',
                      '--output_directory',
                      '-C',
                      metavar='OUT_DIR',
                      help='output directory of the build')
  parser.add_argument(
      '--run-all',
      '--run_all',
      action='store_true',
      help='Run all tests for the file or directory, instead of just one')
  parser.add_argument('--line',
                      type=int,
                      help='run only the test on this line number. c++ only.')
  parser.add_argument('--gtest-filter',
                      '--gtest_filter',
                      '-f',
                      metavar='FILTER',
                      help='test filter')
  parser.add_argument('--test-policy-to-pref-mappings-filter',
                      '--test_policy_to_pref_mappings_filter',
                      metavar='FILTER',
                      help='policy pref mappings test filter')
  parser.add_argument(
      '--dry-run',
      '--dry_run',
      '-n',
      action='store_true',
      help='Print ninja and test run commands without executing them.')
  parser.add_argument(
      '--no-try-android-wrappers',
      '--no_try_android_wrappers',
      action='store_true',
      help='Do not try to use Android test wrappers to run tests.')
  parser.add_argument('--no-fast-local-dev',
                      '--no_fast_local_dev',
                      action='store_true',
                      help='Do not add --fast-local-dev for Android tests.')
  parser.add_argument('files',
                      metavar='FILE_NAME',
                      nargs='+',
                      help='test suite file (eg. FooTest.java)')

  args, _extras = parser.parse_known_args()

  if args.out_dir:
    constants.SetOutputDirectory(args.out_dir)
  constants.CheckOutputDirectory()
  out_dir: str = constants.GetOutDirectory()

  if not os.path.isdir(out_dir):
    parser.error(f'OUT_DIR "{out_dir}" does not exist.')
  target_cache = TargetCache(out_dir)
  filenames = []
  for file in args.files:
    filenames.extend(FindMatchingTestFiles(file))

  targets, used_cache = FindTestTargets(target_cache, out_dir, filenames,
                                        args.run_all)

  gtest_filter = args.gtest_filter
  if not gtest_filter:
    gtest_filter = BuildTestFilter(filenames, args.line)

  if not gtest_filter:
    ExitWithMessage('Failed to derive a gtest filter')

  pref_mapping_filter = args.test_policy_to_pref_mappings_filter
  if not pref_mapping_filter:
    pref_mapping_filter = BuildPrefMappingTestFilter(filenames)

  assert targets
  build_ok = BuildTestTargets(out_dir, targets, args.dry_run)

  # If we used the target cache, it's possible we chose the wrong target because
  # a gn file was changed. The build step above will check for gn modifications
  # and update build.ninja. Use this opportunity the verify the cache is still
  # valid.
  if used_cache and not target_cache.IsStillValid():
    target_cache = TargetCache(out_dir)
    new_targets, _ = FindTestTargets(target_cache, out_dir, filenames,
                                     args.run_all)
    if targets != new_targets:
      # Note that this can happen, for example, if you rename a test target.
      print('gn config was changed, trying to build again', file=sys.stderr)
      targets = new_targets
      build_ok = BuildTestTargets(out_dir, targets, args.dry_run)

  if not build_ok: sys.exit(1)

  RunTestTargets(out_dir, targets, gtest_filter, pref_mapping_filter, _extras,
                 args.dry_run, args.no_try_android_wrappers,
                 args.no_fast_local_dev)


if __name__ == '__main__':
  sys.exit(main())