aboutsummaryrefslogtreecommitdiff
path: root/mesonbuild/mtest.py
blob: 35cb10a5b2bc0dc667bf92b2d8a3991d06d5b056 (plain)
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
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
# Copyright 2016-2017 The Meson development team

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# A tool to run tests in many different ways.

from ._pathlib import Path
from collections import namedtuple
from copy import deepcopy
import argparse
import concurrent.futures as conc
import datetime
import enum
import io
import json
import multiprocessing
import os
import pickle
import platform
import random
import re
import signal
import subprocess
import sys
import tempfile
import textwrap
import time
import typing as T
import xml.etree.ElementTree as et

from . import build
from . import environment
from . import mlog
from .coredata import major_versions_differ, MesonVersionMismatchException
from .coredata import version as coredata_version
from .dependencies import ExternalProgram
from .mesonlib import MesonException, get_wine_shortpath, split_args, join_args
from .backend.backends import TestProtocol, TestSerialisation

# GNU autotools interprets a return code of 77 from tests it executes to
# mean that the test should be skipped.
GNU_SKIP_RETURNCODE = 77

# GNU autotools interprets a return code of 99 from tests it executes to
# mean that the test failed even before testing what it is supposed to test.
GNU_ERROR_RETURNCODE = 99

def is_windows() -> bool:
    platname = platform.system().lower()
    return platname == 'windows'

def is_cygwin() -> bool:
    return sys.platform == 'cygwin'

def determine_worker_count() -> int:
    varname = 'MESON_TESTTHREADS'
    if varname in os.environ:
        try:
            num_workers = int(os.environ[varname])
        except ValueError:
            print('Invalid value in {}, using 1 thread.'.format(varname))
            num_workers = 1
    else:
        try:
            # Fails in some weird environments such as Debian
            # reproducible build.
            num_workers = multiprocessing.cpu_count()
        except Exception:
            num_workers = 1
    return num_workers

def add_arguments(parser: argparse.ArgumentParser) -> None:
    parser.add_argument('--repeat', default=1, dest='repeat', type=int,
                        help='Number of times to run the tests.')
    parser.add_argument('--no-rebuild', default=False, action='store_true',
                        help='Do not rebuild before running tests.')
    parser.add_argument('--gdb', default=False, dest='gdb', action='store_true',
                        help='Run test under gdb.')
    parser.add_argument('--gdb-path', default='gdb', dest='gdb_path',
                        help='Path to the gdb binary (default: gdb).')
    parser.add_argument('--list', default=False, dest='list', action='store_true',
                        help='List available tests.')
    parser.add_argument('--wrapper', default=None, dest='wrapper', type=split_args,
                        help='wrapper to run tests with (e.g. Valgrind)')
    parser.add_argument('-C', default='.', dest='wd',
                        # https://github.com/python/typeshed/issues/3107
                        # https://github.com/python/mypy/issues/7177
                        type=os.path.abspath,  # type: ignore
                        help='directory to cd into before running')
    parser.add_argument('--suite', default=[], dest='include_suites', action='append', metavar='SUITE',
                        help='Only run tests belonging to the given suite.')
    parser.add_argument('--no-suite', default=[], dest='exclude_suites', action='append', metavar='SUITE',
                        help='Do not run tests belonging to the given suite.')
    parser.add_argument('--no-stdsplit', default=True, dest='split', action='store_false',
                        help='Do not split stderr and stdout in test logs.')
    parser.add_argument('--print-errorlogs', default=False, action='store_true',
                        help="Whether to print failing tests' logs.")
    parser.add_argument('--benchmark', default=False, action='store_true',
                        help="Run benchmarks instead of tests.")
    parser.add_argument('--logbase', default='testlog',
                        help="Base name for log file.")
    parser.add_argument('--num-processes', default=determine_worker_count(), type=int,
                        help='How many parallel processes to use.')
    parser.add_argument('-v', '--verbose', default=False, action='store_true',
                        help='Do not redirect stdout and stderr')
    parser.add_argument('-q', '--quiet', default=False, action='store_true',
                        help='Produce less output to the terminal.')
    parser.add_argument('-t', '--timeout-multiplier', type=float, default=None,
                        help='Define a multiplier for test timeout, for example '
                        ' when running tests in particular conditions they might take'
                        ' more time to execute.')
    parser.add_argument('--setup', default=None, dest='setup',
                        help='Which test setup to use.')
    parser.add_argument('--test-args', default=[], type=split_args,
                        help='Arguments to pass to the specified test(s) or all tests')
    parser.add_argument('args', nargs='*',
                        help='Optional list of test names to run. "testname" to run all tests with that name, '
                        '"subprojname:testname" to specifically run "testname" from "subprojname", '
                        '"subprojname:" to run all tests defined by "subprojname".')


def returncode_to_status(retcode: int) -> str:
    # Note: We can't use `os.WIFSIGNALED(result.returncode)` and the related
    # functions here because the status returned by subprocess is munged. It
    # returns a negative value if the process was killed by a signal rather than
    # the raw status returned by `wait()`. Also, If a shell sits between Meson
    # the the actual unit test that shell is likely to convert a termination due
    # to a signal into an exit status of 128 plus the signal number.
    if retcode < 0:
        signum = -retcode
        try:
            signame = signal.Signals(signum).name
        except ValueError:
            signame = 'SIGinvalid'
        return '(killed by signal {} {})'.format(signum, signame)

    if retcode <= 128:
        return '(exit status {})'.format(retcode)

    signum = retcode - 128
    try:
        signame = signal.Signals(signum).name
    except ValueError:
        signame = 'SIGinvalid'
    return '(exit status {} or signal {} {})'.format(retcode, signum, signame)

def env_tuple_to_str(env: T.Iterable[T.Tuple[str, str]]) -> str:
    return ''.join(["{}='{}' ".format(k, v) for k, v in env])


class TestException(MesonException):
    pass


@enum.unique
class TestResult(enum.Enum):

    OK = 'OK'
    TIMEOUT = 'TIMEOUT'
    SKIP = 'SKIP'
    FAIL = 'FAIL'
    EXPECTEDFAIL = 'EXPECTEDFAIL'
    UNEXPECTEDPASS = 'UNEXPECTEDPASS'
    ERROR = 'ERROR'

    @staticmethod
    def maxlen() -> int:
        return 14 # len(UNEXPECTEDPASS)


class TAPParser:
    Plan = namedtuple('Plan', ['count', 'late', 'skipped', 'explanation'])
    Bailout = namedtuple('Bailout', ['message'])
    Test = namedtuple('Test', ['number', 'name', 'result', 'explanation'])
    Error = namedtuple('Error', ['message'])
    Version = namedtuple('Version', ['version'])

    _MAIN = 1
    _AFTER_TEST = 2
    _YAML = 3

    _RE_BAILOUT = re.compile(r'Bail out!\s*(.*)')
    _RE_DIRECTIVE = re.compile(r'(?:\s*\#\s*([Ss][Kk][Ii][Pp]\S*|[Tt][Oo][Dd][Oo])\b\s*(.*))?')
    _RE_PLAN = re.compile(r'1\.\.([0-9]+)' + _RE_DIRECTIVE.pattern)
    _RE_TEST = re.compile(r'((?:not )?ok)\s*(?:([0-9]+)\s*)?([^#]*)' + _RE_DIRECTIVE.pattern)
    _RE_VERSION = re.compile(r'TAP version ([0-9]+)')
    _RE_YAML_START = re.compile(r'(\s+)---.*')
    _RE_YAML_END = re.compile(r'\s+\.\.\.\s*')

    def __init__(self, io: T.Iterator[str]):
        self.io = io

    def parse_test(self, ok: bool, num: int, name: str, directive: T.Optional[str], explanation: T.Optional[str]) -> \
            T.Generator[T.Union['TAPParser.Test', 'TAPParser.Error'], None, None]:
        name = name.strip()
        explanation = explanation.strip() if explanation else None
        if directive is not None:
            directive = directive.upper()
            if directive.startswith('SKIP'):
                if ok:
                    yield self.Test(num, name, TestResult.SKIP, explanation)
                    return
            elif directive == 'TODO':
                yield self.Test(num, name, TestResult.UNEXPECTEDPASS if ok else TestResult.EXPECTEDFAIL, explanation)
                return
            else:
                yield self.Error('invalid directive "{}"'.format(directive,))

        yield self.Test(num, name, TestResult.OK if ok else TestResult.FAIL, explanation)

    def parse(self) -> T.Generator[T.Union['TAPParser.Test', 'TAPParser.Error', 'TAPParser.Version', 'TAPParser.Plan', 'TAPParser.Bailout'], None, None]:
        found_late_test = False
        bailed_out = False
        plan = None
        lineno = 0
        num_tests = 0
        yaml_lineno = None
        yaml_indent = ''
        state = self._MAIN
        version = 12
        while True:
            lineno += 1
            try:
                line = next(self.io).rstrip()
            except StopIteration:
                break

            # YAML blocks are only accepted after a test
            if state == self._AFTER_TEST:
                if version >= 13:
                    m = self._RE_YAML_START.match(line)
                    if m:
                        state = self._YAML
                        yaml_lineno = lineno
                        yaml_indent = m.group(1)
                        continue
                state = self._MAIN

            elif state == self._YAML:
                if self._RE_YAML_END.match(line):
                    state = self._MAIN
                    continue
                if line.startswith(yaml_indent):
                    continue
                yield self.Error('YAML block not terminated (started on line {})'.format(yaml_lineno))
                state = self._MAIN

            assert state == self._MAIN
            if line.startswith('#'):
                continue

            m = self._RE_TEST.match(line)
            if m:
                if plan and plan.late and not found_late_test:
                    yield self.Error('unexpected test after late plan')
                    found_late_test = True
                num_tests += 1
                num = num_tests if m.group(2) is None else int(m.group(2))
                if num != num_tests:
                    yield self.Error('out of order test numbers')
                yield from self.parse_test(m.group(1) == 'ok', num,
                                           m.group(3), m.group(4), m.group(5))
                state = self._AFTER_TEST
                continue

            m = self._RE_PLAN.match(line)
            if m:
                if plan:
                    yield self.Error('more than one plan found')
                else:
                    count = int(m.group(1))
                    skipped = (count == 0)
                    if m.group(2):
                        if m.group(2).upper().startswith('SKIP'):
                            if count > 0:
                                yield self.Error('invalid SKIP directive for plan')
                            skipped = True
                        else:
                            yield self.Error('invalid directive for plan')
                    plan = self.Plan(count=count, late=(num_tests > 0),
                                     skipped=skipped, explanation=m.group(3))
                    yield plan
                continue

            m = self._RE_BAILOUT.match(line)
            if m:
                yield self.Bailout(m.group(1))
                bailed_out = True
                continue

            m = self._RE_VERSION.match(line)
            if m:
                # The TAP version is only accepted as the first line
                if lineno != 1:
                    yield self.Error('version number must be on the first line')
                    continue
                version = int(m.group(1))
                if version < 13:
                    yield self.Error('version number should be at least 13')
                else:
                    yield self.Version(version=version)
                continue

            if not line:
                continue

            yield self.Error('unexpected input at line {}'.format((lineno,)))

        if state == self._YAML:
            yield self.Error('YAML block not terminated (started on line {})'.format(yaml_lineno))

        if not bailed_out and plan and num_tests != plan.count:
            if num_tests < plan.count:
                yield self.Error('Too few tests run (expected {}, got {})'.format(plan.count, num_tests))
            else:
                yield self.Error('Too many tests run (expected {}, got {})'.format(plan.count, num_tests))



class JunitBuilder:

    """Builder for Junit test results.

    Junit is impossible to stream out, it requires attributes counting the
    total number of tests, failures, skips, and errors in the root element
    and in each test suite. As such, we use a builder class to track each
    test case, and calculate all metadata before writing it out.

    For tests with multiple results (like from a TAP test), we record the
    test as a suite with the project_name.test_name. This allows us to track
    each result separately. For tests with only one result (such as exit-code
    tests) we record each one into a suite with the name project_name. The use
    of the project_name allows us to sort subproject tests separately from
    the root project.
    """

    def __init__(self, filename: str) -> None:
        self.filename = filename
        self.root = et.Element(
            'testsuites', tests='0', errors='0', failures='0')
        self.suites = {}  # type: T.Dict[str, et.Element]

    def log(self, name: str, test: 'TestRun') -> None:
        """Log a single test case."""
        if test.junit is not None:
            for suite in test.junit.findall('.//testsuite'):
                # Assume that we don't need to merge anything here...
                suite.attrib['name'] = '{}.{}.{}'.format(test.project, name, suite.attrib['name'])

                # GTest can inject invalid attributes
                for case in suite.findall('.//testcase[@result]'):
                    del case.attrib['result']
                for case in suite.findall('.//testcase[@timestamp]'):
                    del case.attrib['timestamp']
                self.root.append(suite)
            return

        # In this case we have a test binary with multiple results.
        # We want to record this so that each result is recorded
        # separately
        if test.results:
            suitename = '{}.{}'.format(test.project, name)
            assert suitename not in self.suites, 'duplicate suite'

            suite = self.suites[suitename] = et.Element(
                'testsuite',
                name=suitename,
                tests=str(len(test.results)),
                errors=str(sum(1 for r in test.results if r is TestResult.ERROR)),
                failures=str(sum(1 for r in test.results if r in
                                 {TestResult.FAIL, TestResult.UNEXPECTEDPASS, TestResult.TIMEOUT})),
                skipped=str(sum(1 for r in test.results if r is TestResult.SKIP)),
            )

            for i, result in enumerate(test.results):
                # Both name and classname are required. Set them both to the
                # number of the test in a TAP test, as TAP doesn't give names.
                testcase = et.SubElement(suite, 'testcase', name=str(i), classname=str(i))
                if result is TestResult.SKIP:
                    et.SubElement(testcase, 'skipped')
                elif result is TestResult.ERROR:
                    et.SubElement(testcase, 'error')
                elif result is TestResult.FAIL:
                    et.SubElement(testcase, 'failure')
                elif result is TestResult.UNEXPECTEDPASS:
                    fail = et.SubElement(testcase, 'failure')
                    fail.text = 'Test unexpected passed.'
                elif result is TestResult.TIMEOUT:
                    fail = et.SubElement(testcase, 'failure')
                    fail.text = 'Test did not finish before configured timeout.'
            if test.stdo:
                out = et.SubElement(suite, 'system-out')
                out.text = test.stdo.rstrip()
            if test.stde:
                err = et.SubElement(suite, 'system-err')
                err.text = test.stde.rstrip()
        else:
            if test.project not in self.suites:
                suite = self.suites[test.project] = et.Element(
                    'testsuite', name=test.project, tests='1', errors='0',
                    failures='0', skipped='0')
            else:
                suite = self.suites[test.project]
                suite.attrib['tests'] = str(int(suite.attrib['tests']) + 1)

            testcase = et.SubElement(suite, 'testcase', name=name, classname=name)
            if test.res is TestResult.SKIP:
                et.SubElement(testcase, 'skipped')
                suite.attrib['skipped'] = str(int(suite.attrib['skipped']) + 1)
            elif test.res is TestResult.ERROR:
                et.SubElement(testcase, 'error')
                suite.attrib['errors'] = str(int(suite.attrib['errors']) + 1)
            elif test.res is TestResult.FAIL:
                et.SubElement(testcase, 'failure')
                suite.attrib['failures'] = str(int(suite.attrib['failures']) + 1)
            if test.stdo:
                out = et.SubElement(testcase, 'system-out')
                out.text = test.stdo.rstrip()
            if test.stde:
                err = et.SubElement(testcase, 'system-err')
                err.text = test.stde.rstrip()

    def write(self) -> None:
        """Calculate total test counts and write out the xml result."""
        for suite in self.suites.values():
            self.root.append(suite)
            # Skipped is really not allowed in the "testsuits" element
            for attr in ['tests', 'errors', 'failures']:
                self.root.attrib[attr] = str(int(self.root.attrib[attr]) + int(suite.attrib[attr]))

        tree = et.ElementTree(self.root)
        with open(self.filename, 'wb') as f:
            tree.write(f, encoding='utf-8', xml_declaration=True)


class TestRun:

    @classmethod
    def make_gtest(cls, test: TestSerialisation, test_env: T.Dict[str, str],
                   returncode: int, starttime: float, duration: float,
                   stdo: T.Optional[str], stde: T.Optional[str],
                   cmd: T.Optional[T.List[str]]) -> 'TestRun':
        filename = '{}.xml'.format(test.name)
        if test.workdir:
            filename = os.path.join(test.workdir, filename)
        tree = et.parse(filename)

        return cls.make_exitcode(
            test, test_env, returncode, starttime, duration, stdo, stde, cmd,
            junit=tree)

    @classmethod
    def make_exitcode(cls, test: TestSerialisation, test_env: T.Dict[str, str],
                      returncode: int, starttime: float, duration: float,
                      stdo: T.Optional[str], stde: T.Optional[str],
                      cmd: T.Optional[T.List[str]], **kwargs: T.Any) -> 'TestRun':
        if returncode == GNU_SKIP_RETURNCODE:
            res = TestResult.SKIP
        elif returncode == GNU_ERROR_RETURNCODE:
            res = TestResult.ERROR
        elif test.should_fail:
            res = TestResult.EXPECTEDFAIL if bool(returncode) else TestResult.UNEXPECTEDPASS
        else:
            res = TestResult.FAIL if bool(returncode) else TestResult.OK
        return cls(test, test_env, res, [], returncode, starttime, duration, stdo, stde, cmd, **kwargs)

    @classmethod
    def make_tap(cls, test: TestSerialisation, test_env: T.Dict[str, str],
                 returncode: int, starttime: float, duration: float,
                 stdo: str, stde: str,
                 cmd: T.Optional[T.List[str]]) -> 'TestRun':
        res = None    # type: T.Optional[TestResult]
        results = []  # type: T.List[TestResult]
        failed = False

        for i in TAPParser(io.StringIO(stdo)).parse():
            if isinstance(i, TAPParser.Bailout):
                results.append(TestResult.ERROR)
                failed = True
            elif isinstance(i, TAPParser.Test):
                results.append(i.result)
                if i.result not in {TestResult.OK, TestResult.EXPECTEDFAIL, TestResult.SKIP}:
                    failed = True
            elif isinstance(i, TAPParser.Error):
                results.append(TestResult.ERROR)
                stde += '\nTAP parsing error: ' + i.message
                failed = True

        if returncode != 0:
            res = TestResult.ERROR
            stde += '\n(test program exited with status code {})'.format(returncode,)

        if res is None:
            # Now determine the overall result of the test based on the outcome of the subcases
            if all(t is TestResult.SKIP for t in results):
                # This includes the case where num_tests is zero
                res = TestResult.SKIP
            elif test.should_fail:
                res = TestResult.EXPECTEDFAIL if failed else TestResult.UNEXPECTEDPASS
            else:
                res = TestResult.FAIL if failed else TestResult.OK

        return cls(test, test_env, res, results, returncode, starttime, duration, stdo, stde, cmd)

    def __init__(self, test: TestSerialisation, test_env: T.Dict[str, str],
                 res: TestResult, results: T.List[TestResult], returncode:
                 int, starttime: float, duration: float,
                 stdo: T.Optional[str], stde: T.Optional[str],
                 cmd: T.Optional[T.List[str]], *, junit: T.Optional[et.ElementTree] = None):
        assert isinstance(res, TestResult)
        self.res = res
        self.results = results  # May be an empty list
        self.returncode = returncode
        self.starttime = starttime
        self.duration = duration
        self.stdo = stdo
        self.stde = stde
        self.cmd = cmd
        self.env = test_env
        self.should_fail = test.should_fail
        self.project = test.project_name
        self.junit = junit

    def get_log(self) -> str:
        res = '--- command ---\n'
        if self.cmd is None:
            res += 'NONE\n'
        else:
            test_only_env = set(self.env.items()) - set(os.environ.items())
            starttime_str = time.strftime("%H:%M:%S", time.gmtime(self.starttime))
            res += '{} {}{}\n'.format(
                starttime_str, env_tuple_to_str(test_only_env), ' '.join(self.cmd)
            )
        if self.stdo:
            res += '--- stdout ---\n'
            res += self.stdo
        if self.stde:
            if res[-1:] != '\n':
                res += '\n'
            res += '--- stderr ---\n'
            res += self.stde
        if res[-1:] != '\n':
            res += '\n'
        res += '-------\n\n'
        return res

def decode(stream: T.Union[None, bytes]) -> str:
    if stream is None:
        return ''
    try:
        return stream.decode('utf-8')
    except UnicodeDecodeError:
        return stream.decode('iso-8859-1', errors='ignore')

def write_json_log(jsonlogfile: T.TextIO, test_name: str, result: TestRun) -> None:
    jresult = {'name': test_name,
               'stdout': result.stdo,
               'result': result.res.value,
               'starttime': result.starttime,
               'duration': result.duration,
               'returncode': result.returncode,
               'env': result.env,
               'command': result.cmd}  # type: T.Dict[str, T.Any]
    if result.stde:
        jresult['stderr'] = result.stde
    jsonlogfile.write(json.dumps(jresult) + '\n')

def run_with_mono(fname: str) -> bool:
    return fname.endswith('.exe') and not (is_windows() or is_cygwin())

def check_testdata(objs: T.List[TestSerialisation]) -> T.List[TestSerialisation]:
    if not isinstance(objs, list):
        raise MesonVersionMismatchException('<unknown>', coredata_version)
    for obj in objs:
        if not isinstance(obj, TestSerialisation):
            raise MesonVersionMismatchException('<unknown>', coredata_version)
        if not hasattr(obj, 'version'):
            raise MesonVersionMismatchException('<unknown>', coredata_version)
        if major_versions_differ(obj.version, coredata_version):
            raise MesonVersionMismatchException(obj.version, coredata_version)
    return objs

def load_benchmarks(build_dir: str) -> T.List[TestSerialisation]:
    datafile = Path(build_dir) / 'meson-private' / 'meson_benchmark_setup.dat'
    if not datafile.is_file():
        raise TestException('Directory {!r} does not seem to be a Meson build directory.'.format(build_dir))
    with datafile.open('rb') as f:
        objs = check_testdata(pickle.load(f))
    return objs

def load_tests(build_dir: str) -> T.List[TestSerialisation]:
    datafile = Path(build_dir) / 'meson-private' / 'meson_test_setup.dat'
    if not datafile.is_file():
        raise TestException('Directory {!r} does not seem to be a Meson build directory.'.format(build_dir))
    with datafile.open('rb') as f:
        objs = check_testdata(pickle.load(f))
    return objs


class SingleTestRunner:

    def __init__(self, test: TestSerialisation, test_env: T.Dict[str, str],
                 env: T.Dict[str, str], options: argparse.Namespace):
        self.test = test
        self.test_env = test_env
        self.env = env
        self.options = options

    def _get_cmd(self) -> T.Optional[T.List[str]]:
        if self.test.fname[0].endswith('.jar'):
            return ['java', '-jar'] + self.test.fname
        elif not self.test.is_cross_built and run_with_mono(self.test.fname[0]):
            return ['mono'] + self.test.fname
        elif self.test.cmd_is_built and self.test.needs_exe_wrapper:
            if self.test.exe_runner is None:
                # Can not run test on cross compiled executable
                # because there is no execute wrapper.
                return None
            elif self.test.cmd_is_built:
                # If the command is not built (ie, its a python script),
                # then we don't check for the exe-wrapper
                if not self.test.exe_runner.found():
                    msg = ('The exe_wrapper defined in the cross file {!r} was not '
                           'found. Please check the command and/or add it to PATH.')
                    raise TestException(msg.format(self.test.exe_runner.name))
                return self.test.exe_runner.get_command() + self.test.fname
        return self.test.fname

    def run(self) -> TestRun:
        cmd = self._get_cmd()
        if cmd is None:
            skip_stdout = 'Not run because can not execute cross compiled binaries.'
            return TestRun(self.test, self.test_env, TestResult.SKIP, [], GNU_SKIP_RETURNCODE, time.time(), 0.0, skip_stdout, None, None)
        else:
            wrap = TestHarness.get_wrapper(self.options)
            if self.options.gdb:
                self.test.timeout = None
            return self._run_cmd(wrap + cmd + self.test.cmd_args + self.options.test_args)

    def _run_cmd(self, cmd: T.List[str]) -> TestRun:
        starttime = time.time()

        if self.test.extra_paths:
            self.env['PATH'] = os.pathsep.join(self.test.extra_paths + ['']) + self.env['PATH']
            winecmd = []
            for c in cmd:
                winecmd.append(c)
                if os.path.basename(c).startswith('wine'):
                    self.env['WINEPATH'] = get_wine_shortpath(
                        winecmd,
                        ['Z:' + p for p in self.test.extra_paths] + self.env.get('WINEPATH', '').split(';')
                    )
                    break

        # If MALLOC_PERTURB_ is not set, or if it is set to an empty value,
        # (i.e., the test or the environment don't explicitly set it), set
        # it ourselves. We do this unconditionally for regular tests
        # because it is extremely useful to have.
        # Setting MALLOC_PERTURB_="0" will completely disable this feature.
        if ('MALLOC_PERTURB_' not in self.env or not self.env['MALLOC_PERTURB_']) and not self.options.benchmark:
            self.env['MALLOC_PERTURB_'] = str(random.randint(1, 255))

        stdout = None
        stderr = None
        if not self.options.verbose:
            stdout = tempfile.TemporaryFile("wb+")
            stderr = tempfile.TemporaryFile("wb+") if self.options.split else stdout
        if self.test.protocol is TestProtocol.TAP and stderr is stdout:
            stdout = tempfile.TemporaryFile("wb+")

        # Let gdb handle ^C instead of us
        if self.options.gdb:
            previous_sigint_handler = signal.getsignal(signal.SIGINT)
            # Make the meson executable ignore SIGINT while gdb is running.
            signal.signal(signal.SIGINT, signal.SIG_IGN)

        def preexec_fn() -> None:
            if self.options.gdb:
                # Restore the SIGINT handler for the child process to
                # ensure it can handle it.
                signal.signal(signal.SIGINT, signal.SIG_DFL)
            else:
                # We don't want setsid() in gdb because gdb needs the
                # terminal in order to handle ^C and not show tcsetpgrp()
                # errors avoid not being able to use the terminal.
                os.setsid()

        extra_cmd = []  # type: T.List[str]
        if self.test.protocol is TestProtocol.GTEST:
            gtestname = self.test.name
            if self.test.workdir:
                gtestname = os.path.join(self.test.workdir, self.test.name)
            extra_cmd.append('--gtest_output=xml:{}.xml'.format(gtestname))

        p = subprocess.Popen(cmd + extra_cmd,
                             stdout=stdout,
                             stderr=stderr,
                             env=self.env,
                             cwd=self.test.workdir,
                             preexec_fn=preexec_fn if not is_windows() else None)
        timed_out = False
        kill_test = False
        if self.test.timeout is None:
            timeout = None
        elif self.options.timeout_multiplier is not None:
            timeout = self.test.timeout * self.options.timeout_multiplier
        else:
            timeout = self.test.timeout
        try:
            p.communicate(timeout=timeout)
        except subprocess.TimeoutExpired:
            if self.options.verbose:
                print('{} time out (After {} seconds)'.format(self.test.name, timeout))
            timed_out = True
        except KeyboardInterrupt:
            mlog.warning('CTRL-C detected while running {}'.format(self.test.name))
            kill_test = True
        finally:
            if self.options.gdb:
                # Let us accept ^C again
                signal.signal(signal.SIGINT, previous_sigint_handler)

        additional_error = None

        if kill_test or timed_out:
            # Python does not provide multiplatform support for
            # killing a process and all its children so we need
            # to roll our own.
            if is_windows():
                subprocess.run(['taskkill', '/F', '/T', '/PID', str(p.pid)])
            else:

                def _send_signal_to_process_group(pgid : int, signum : int) -> None:
                    """ sends a signal to a process group """
                    try:
                        os.killpg(pgid, signum)
                    except ProcessLookupError:
                        # Sometimes (e.g. with Wine) this happens.
                        # There's nothing we can do (maybe the process
                        # already died) so carry on.
                        pass

                # Send a termination signal to the process group that setsid()
                # created - giving it a chance to perform any cleanup.
                _send_signal_to_process_group(p.pid, signal.SIGTERM)

                # Make sure the termination signal actually kills the process
                # group, otherwise retry with a SIGKILL.
                try:
                    p.communicate(timeout=0.5)
                except subprocess.TimeoutExpired:
                    _send_signal_to_process_group(p.pid, signal.SIGKILL)
            try:
                p.communicate(timeout=1)
            except subprocess.TimeoutExpired:
                # An earlier kill attempt has not worked for whatever reason.
                # Try to kill it one last time with a direct call.
                # If the process has spawned children, they will remain around.
                p.kill()
                try:
                    p.communicate(timeout=1)
                except subprocess.TimeoutExpired:
                    additional_error = 'Test process could not be killed.'
            except ValueError:
                additional_error = 'Could not read output. Maybe the process has redirected its stdout/stderr?'
        endtime = time.time()
        duration = endtime - starttime
        if additional_error is None:
            if stdout is None:
                stdo = ''
            else:
                stdout.seek(0)
                stdo = decode(stdout.read())
            if stderr is None or stderr is stdout:
                stde = ''
            else:
                stderr.seek(0)
                stde = decode(stderr.read())
        else:
            stdo = ""
            stde = additional_error
        if timed_out:
            return TestRun(self.test, self.test_env, TestResult.TIMEOUT, [], p.returncode, starttime, duration, stdo, stde, cmd)
        else:
            if self.test.protocol is TestProtocol.EXITCODE:
                return TestRun.make_exitcode(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)
            elif self.test.protocol is TestProtocol.GTEST:
                return TestRun.make_gtest(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)
            else:
                if self.options.verbose:
                    print(stdo, end='')
                return TestRun.make_tap(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)


class TestHarness:
    def __init__(self, options: argparse.Namespace):
        self.options = options
        self.collected_logs = []  # type: T.List[str]
        self.collected_failures = []  # type: T.List[str]
        self.fail_count = 0
        self.expectedfail_count = 0
        self.unexpectedpass_count = 0
        self.success_count = 0
        self.skip_count = 0
        self.timeout_count = 0
        self.is_run = False
        self.tests = None
        self.results = []         # type: T.List[TestRun]
        self.logfilename = None   # type: T.Optional[str]
        self.logfile = None       # type: T.Optional[T.TextIO]
        self.jsonlogfile = None   # type: T.Optional[T.TextIO]
        self.junit = None         # type: T.Optional[JunitBuilder]
        if self.options.benchmark:
            self.tests = load_benchmarks(options.wd)
        else:
            self.tests = load_tests(options.wd)
        ss = set()
        for t in self.tests:
            for s in t.suite:
                ss.add(s)
        self.suites = list(ss)

    def __del__(self) -> None:
        self.close_logfiles()

    def __enter__(self) -> 'TestHarness':
        return self

    def __exit__(self, exc_type: T.Any, exc_value: T.Any, traceback: T.Any) -> None:
        self.close_logfiles()

    def close_logfiles(self) -> None:
        for f in ['logfile', 'jsonlogfile']:
            lfile =  getattr(self, f)
            if lfile:
                lfile.close()
                setattr(self, f, None)

    def merge_suite_options(self, options: argparse.Namespace, test: TestSerialisation) -> T.Dict[str, str]:
        if ':' in options.setup:
            if options.setup not in self.build_data.test_setups:
                sys.exit("Unknown test setup '{}'.".format(options.setup))
            current = self.build_data.test_setups[options.setup]
        else:
            full_name = test.project_name + ":" + options.setup
            if full_name not in self.build_data.test_setups:
                sys.exit("Test setup '{}' not found from project '{}'.".format(options.setup, test.project_name))
            current = self.build_data.test_setups[full_name]
        if not options.gdb:
            options.gdb = current.gdb
        if options.gdb:
            options.verbose = True
        if options.timeout_multiplier is None:
            options.timeout_multiplier = current.timeout_multiplier
    #    if options.env is None:
    #        options.env = current.env # FIXME, should probably merge options here.
        if options.wrapper is not None and current.exe_wrapper is not None:
            sys.exit('Conflict: both test setup and command line specify an exe wrapper.')
        if options.wrapper is None:
            options.wrapper = current.exe_wrapper
        return current.env.get_env(os.environ.copy())

    def get_test_runner(self, test: TestSerialisation) -> SingleTestRunner:
        options = deepcopy(self.options)
        if not options.setup:
            options.setup = self.build_data.test_setup_default_name
        if options.setup:
            env = self.merge_suite_options(options, test)
        else:
            env = os.environ.copy()
        test_env = test.env.get_env(env)
        env.update(test_env)
        if (test.is_cross_built and test.needs_exe_wrapper and
                test.exe_runner and test.exe_runner.found()):
            env['MESON_EXE_WRAPPER'] = join_args(test.exe_runner.get_command())
        return SingleTestRunner(test, test_env, env, options)

    def process_test_result(self, result: TestRun) -> None:
        if result.res is TestResult.TIMEOUT:
            self.timeout_count += 1
        elif result.res is TestResult.SKIP:
            self.skip_count += 1
        elif result.res is TestResult.OK:
            self.success_count += 1
        elif result.res is TestResult.FAIL or result.res is TestResult.ERROR:
            self.fail_count += 1
        elif result.res is TestResult.EXPECTEDFAIL:
            self.expectedfail_count += 1
        elif result.res is TestResult.UNEXPECTEDPASS:
            self.unexpectedpass_count += 1
        else:
            sys.exit('Unknown test result encountered: {}'.format(result.res))

    def print_stats(self, test_count: int, name_max_len: int,
                    tests: T.List[TestSerialisation],
                    name: str, result: TestRun, i: int) -> None:
        ok_statuses = (TestResult.OK, TestResult.EXPECTEDFAIL)
        bad_statuses = (TestResult.FAIL, TestResult.TIMEOUT,
                        TestResult.UNEXPECTEDPASS, TestResult.ERROR)
        result_str = '{num:{numlen}}/{testcount} {name:{name_max_len}} {res:{reslen}} {dur:.2f}s'.format(
            numlen=len(str(test_count)),
            num=i,
            testcount=test_count,
            name_max_len=name_max_len,
            name=name,
            reslen=TestResult.maxlen(),
            res=result.res.value,
            dur=result.duration)
        if result.res is TestResult.FAIL:
            result_str += ' ' + returncode_to_status(result.returncode)
        if not self.options.quiet or result.res not in ok_statuses:
            if result.res not in ok_statuses:
                self.collected_failures.append(result_str)
                if mlog.colorize_console():
                    if result.res in bad_statuses:
                        self.collected_failures.append(result_str)
                        decorator = mlog.red
                    elif result.res is TestResult.SKIP:
                        decorator = mlog.yellow
                    else:
                        sys.exit('Unreachable code was ... well ... reached.')
                    print(decorator(result_str).get_text(True))
            else:
                print(result_str)
        result_str += "\n\n" + result.get_log()
        if result.res in bad_statuses:
            if self.options.print_errorlogs:
                self.collected_logs.append(result_str)
        if self.logfile:
            self.logfile.write(result_str)
        if self.jsonlogfile:
            write_json_log(self.jsonlogfile, name, result)
        if self.junit:
            self.junit.log(name, result)

    def print_summary(self) -> None:
        # Prepend a list of failures
        msg = '' if len(self.collected_failures) < 1 else "\nSummary of Failures:\n\n"
        msg += '\n'.join(self.collected_failures)
        msg += textwrap.dedent('''

            Ok:                 {:<4}
            Expected Fail:      {:<4}
            Fail:               {:<4}
            Unexpected Pass:    {:<4}
            Skipped:            {:<4}
            Timeout:            {:<4}
            ''').format(self.success_count, self.expectedfail_count, self.fail_count,
           self.unexpectedpass_count, self.skip_count, self.timeout_count)
        print(msg)
        if self.logfile:
            self.logfile.write(msg)
        if self.junit:
            self.junit.write()

    def print_collected_logs(self) -> None:
        if self.collected_logs:
            if len(self.collected_logs) > 10:
                print('\nThe output from 10 first failed tests:\n')
            else:
                print('\nThe output from the failed tests:\n')
            for log in self.collected_logs[:10]:
                lines = log.splitlines()
                if len(lines) > 104:
                    print('\n'.join(lines[0:4]))
                    print('--- Listing only the last 100 lines from a long log. ---')
                    lines = lines[-100:]
                for line in lines:
                    try:
                        print(line)
                    except UnicodeEncodeError:
                        line = line.encode('ascii', errors='replace').decode()
                        print(line)

    def total_failure_count(self) -> int:
        return self.fail_count + self.unexpectedpass_count + self.timeout_count

    def doit(self) -> int:
        if self.is_run:
            raise RuntimeError('Test harness object can only be used once.')
        self.is_run = True
        tests = self.get_tests()
        if not tests:
            return 0
        self.run_tests(tests)
        return self.total_failure_count()

    @staticmethod
    def split_suite_string(suite: str) -> T.Tuple[str, str]:
        if ':' in suite:
            split = suite.split(':', 1)
            assert len(split) == 2
            return split[0], split[1]
        else:
            return suite, ""

    @staticmethod
    def test_in_suites(test: TestSerialisation, suites: T.List[str]) -> bool:
        for suite in suites:
            (prj_match, st_match) = TestHarness.split_suite_string(suite)
            for prjst in test.suite:
                (prj, st) = TestHarness.split_suite_string(prjst)

                # the SUITE can be passed as
                #     suite_name
                # or
                #     project_name:suite_name
                # so we need to select only the test belonging to project_name

                # this if handle the first case (i.e., SUITE == suite_name)

                # in this way we can run tests belonging to different
                # (sub)projects which share the same suite_name
                if not st_match and st == prj_match:
                    return True

                # these two conditions are needed to handle the second option
                # i.e., SUITE == project_name:suite_name

                # in this way we select the only the tests of
                # project_name with suite_name
                if prj_match and prj != prj_match:
                    continue
                if st_match and st != st_match:
                    continue
                return True
        return False

    def test_suitable(self, test: TestSerialisation) -> bool:
        return ((not self.options.include_suites or
                TestHarness.test_in_suites(test, self.options.include_suites)) and not
                TestHarness.test_in_suites(test, self.options.exclude_suites))

    def tests_from_args(self, tests: T.List[TestSerialisation]) -> T.Generator[TestSerialisation, None, None]:
        '''
        Allow specifying test names like "meson test foo1 foo2", where test('foo1', ...)

        Also support specifying the subproject to run tests from like
        "meson test subproj:" (all tests inside subproj) or "meson test subproj:foo1"
        to run foo1 inside subproj. Coincidentally also "meson test :foo1" to
        run all tests with that name across all subprojects, which is
        identical to "meson test foo1"
        '''
        for arg in self.options.args:
            if ':' in arg:
                subproj, name = arg.split(':', maxsplit=1)
            else:
                subproj, name = '', arg
            for t in tests:
                if subproj and t.project_name != subproj:
                    continue
                if name and t.name != name:
                    continue
                yield t

    def get_tests(self) -> T.List[TestSerialisation]:
        if not self.tests:
            print('No tests defined.')
            return []

        if self.options.include_suites or self.options.exclude_suites:
            tests = []
            for tst in self.tests:
                if self.test_suitable(tst):
                    tests.append(tst)
        else:
            tests = self.tests

        if self.options.args:
            tests = list(self.tests_from_args(tests))

        if not tests:
            print('No suitable tests defined.')
            return []

        return tests

    def open_log_files(self) -> None:
        if not self.options.logbase or self.options.verbose:
            return

        namebase = None
        logfile_base = os.path.join(self.options.wd, 'meson-logs', self.options.logbase)

        if self.options.wrapper:
            namebase = os.path.basename(self.get_wrapper(self.options)[0])
        elif self.options.setup:
            namebase = self.options.setup.replace(":", "_")

        if namebase:
            logfile_base += '-' + namebase.replace(' ', '_')

        self.junit = JunitBuilder(logfile_base + '.junit.xml')

        self.logfilename = logfile_base + '.txt'
        self.jsonlogfilename = logfile_base + '.json'

        self.jsonlogfile = open(self.jsonlogfilename, 'w', encoding='utf-8', errors='replace')
        self.logfile = open(self.logfilename, 'w', encoding='utf-8', errors='surrogateescape')

        self.logfile.write('Log of Meson test suite run on {}\n\n'.format(datetime.datetime.now().isoformat()))
        inherit_env = env_tuple_to_str(os.environ.items())
        self.logfile.write('Inherited environment: {}\n\n'.format(inherit_env))

    @staticmethod
    def get_wrapper(options: argparse.Namespace) -> T.List[str]:
        wrap = []  # type: T.List[str]
        if options.gdb:
            wrap = [options.gdb_path, '--quiet', '--nh']
            if options.repeat > 1:
                wrap += ['-ex', 'run', '-ex', 'quit']
            # Signal the end of arguments to gdb
            wrap += ['--args']
        if options.wrapper:
            wrap += options.wrapper
        return wrap

    def get_pretty_suite(self, test: TestSerialisation) -> str:
        if len(self.suites) > 1 and test.suite:
            rv = TestHarness.split_suite_string(test.suite[0])[0]
            s = "+".join(TestHarness.split_suite_string(s)[1] for s in test.suite)
            if s:
                rv += ":"
            return rv + s + " / " + test.name
        else:
            return test.name

    def run_tests(self, tests: T.List[TestSerialisation]) -> None:
        executor = None
        futures = []  # type: T.List[T.Tuple[conc.Future[TestRun], int, int, T.List[TestSerialisation], str, int]]
        test_count = len(tests)
        name_max_len = max([len(self.get_pretty_suite(test)) for test in tests])
        self.open_log_files()
        startdir = os.getcwd()
        if self.options.wd:
            os.chdir(self.options.wd)
        self.build_data = build.load(os.getcwd())

        try:
            for _ in range(self.options.repeat):
                for i, test in enumerate(tests, 1):
                    visible_name = self.get_pretty_suite(test)
                    single_test = self.get_test_runner(test)

                    if not test.is_parallel or self.options.num_processes == 1 or single_test.options.gdb:
                        self.drain_futures(futures)
                        futures = []
                        res = single_test.run()
                        self.process_test_result(res)
                        self.print_stats(test_count, name_max_len, tests, visible_name, res, i)
                    else:
                        if not executor:
                            executor = conc.ThreadPoolExecutor(max_workers=self.options.num_processes)
                        f = executor.submit(single_test.run)
                        futures.append((f, test_count, name_max_len, tests, visible_name, i))
                    if self.options.repeat > 1 and self.fail_count:
                        break
                if self.options.repeat > 1 and self.fail_count:
                    break

            self.drain_futures(futures)
            self.print_collected_logs()
            self.print_summary()

            if self.logfilename:
                print('Full log written to {}'.format(self.logfilename))
        finally:
            os.chdir(startdir)

    def drain_futures(self, futures: T.List[T.Tuple['conc.Future[TestRun]', int, int, T.List[TestSerialisation], str, int]]) -> None:
        for x in futures:
            (result, test_count, name_max_len, tests, name, i) = x
            if self.options.repeat > 1 and self.fail_count:
                result.cancel()
            if self.options.verbose:
                result.result()
            self.process_test_result(result.result())
            self.print_stats(test_count, name_max_len, tests, name, result.result(), i)

    def run_special(self) -> int:
        '''Tests run by the user, usually something like "under gdb 1000 times".'''
        if self.is_run:
            raise RuntimeError('Can not use run_special after a full run.')
        tests = self.get_tests()
        if not tests:
            return 0
        self.run_tests(tests)
        return self.total_failure_count()


def list_tests(th: TestHarness) -> bool:
    tests = th.get_tests()
    for t in tests:
        print(th.get_pretty_suite(t))
    return not tests

def rebuild_all(wd: str) -> bool:
    if not (Path(wd) / 'build.ninja').is_file():
        print('Only ninja backend is supported to rebuild tests before running them.')
        return True

    ninja = environment.detect_ninja()
    if not ninja:
        print("Can't find ninja, can't rebuild test.")
        return False

    ret = subprocess.run(ninja + ['-C', wd]).returncode
    if ret != 0:
        print('Could not rebuild {}'.format(wd))
        return False

    return True

def run(options: argparse.Namespace) -> int:
    if options.benchmark:
        options.num_processes = 1

    if options.verbose and options.quiet:
        print('Can not be both quiet and verbose at the same time.')
        return 1

    check_bin = None
    if options.gdb:
        options.verbose = True
        if options.wrapper:
            print('Must not specify both a wrapper and gdb at the same time.')
            return 1
        check_bin = 'gdb'

    if options.wrapper:
        check_bin = options.wrapper[0]

    if check_bin is not None:
        exe = ExternalProgram(check_bin, silent=True)
        if not exe.found():
            print('Could not find requested program: {!r}'.format(check_bin))
            return 1

    if not options.list and not options.no_rebuild:
        if not rebuild_all(options.wd):
            # We return 125 here in case the build failed.
            # The reason is that exit code 125 tells `git bisect run` that the current commit should be skipped.
            # Thus users can directly use `meson test` to bisect without needing to handle the does-not-build case separately in a wrapper script.
            return 125

    with TestHarness(options) as th:
        try:
            if options.list:
                return list_tests(th)
            if not options.args:
                return th.doit()
            return th.run_special()
        except TestException as e:
            print('Meson test encountered an error:\n')
            if os.environ.get('MESON_FORCE_BACKTRACE'):
                raise e
            else:
                print(e)
            return 1

def run_with_args(args: T.List[str]) -> int:
    parser = argparse.ArgumentParser(prog='meson test')
    add_arguments(parser)
    options = parser.parse_args(args)
    return run(options)