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Viewing changes to mandos-ctl

  • Committer: Teddy Hogeborn
  • Date: 2019-02-28 21:07:58 UTC
  • Revision ID: teddy@recompile.se-20190228210758-zt2bfeer3v66porp
mandos-ctl (rfc3339_duration_to_delta): Improve tests

* mandos-ctl (rfc3339_duration_to_delta): Add test for month-only
                                          value, and tests that
                                          invalid values raises
                                          ValueError.

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mandos-ctl
 
1
#!/usr/bin/python
 
2
# -*- mode: python; coding: utf-8; after-save-hook: (lambda () (let ((command (if (and (boundp 'tramp-file-name-structure) (string-match (car tramp-file-name-structure) (buffer-file-name))) (tramp-file-name-localname (tramp-dissect-file-name (buffer-file-name))) (buffer-file-name)))) (if (= (shell-command (format "%s --check" (shell-quote-argument command)) "*Test*") 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w)) (kill-buffer "*Test*")) (display-buffer "*Test*")))); -*-
 
3
#
 
4
# Mandos Monitor - Control and monitor the Mandos server
 
5
#
 
6
# Copyright © 2008-2019 Teddy Hogeborn
 
7
# Copyright © 2008-2019 Björn Påhlsson
 
8
#
 
9
# This file is part of Mandos.
 
10
#
 
11
# Mandos is free software: you can redistribute it and/or modify it
 
12
# under the terms of the GNU General Public License as published by
 
13
# the Free Software Foundation, either version 3 of the License, or
 
14
# (at your option) any later version.
 
15
#
 
16
#     Mandos is distributed in the hope that it will be useful, but
 
17
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
18
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
19
#     GNU General Public License for more details.
 
20
#
 
21
# You should have received a copy of the GNU General Public License
 
22
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
23
#
 
24
# Contact the authors at <mandos@recompile.se>.
 
25
#
 
26
 
 
27
from __future__ import (division, absolute_import, print_function,
 
28
                        unicode_literals)
 
29
 
 
30
try:
 
31
    from future_builtins import *
 
32
except ImportError:
 
33
    pass
 
34
 
 
35
import sys
 
36
import argparse
 
37
import locale
 
38
import datetime
 
39
import re
 
40
import os
 
41
import collections
 
42
import json
 
43
import unittest
 
44
import logging
 
45
 
 
46
import dbus
 
47
 
 
48
# Show warnings by default
 
49
if not sys.warnoptions:
 
50
    import warnings
 
51
    warnings.simplefilter("default")
 
52
 
 
53
log = logging.getLogger(sys.argv[0])
 
54
logging.basicConfig(level="INFO", # Show info level messages
 
55
                    format="%(message)s") # Show basic log messages
 
56
 
 
57
logging.captureWarnings(True)   # Show warnings via the logging system
 
58
 
 
59
if sys.version_info.major == 2:
 
60
    str = unicode
 
61
 
 
62
locale.setlocale(locale.LC_ALL, "")
 
63
 
 
64
tablewords = {
 
65
    "Name": "Name",
 
66
    "Enabled": "Enabled",
 
67
    "Timeout": "Timeout",
 
68
    "LastCheckedOK": "Last Successful Check",
 
69
    "LastApprovalRequest": "Last Approval Request",
 
70
    "Created": "Created",
 
71
    "Interval": "Interval",
 
72
    "Host": "Host",
 
73
    "Fingerprint": "Fingerprint",
 
74
    "KeyID": "Key ID",
 
75
    "CheckerRunning": "Check Is Running",
 
76
    "LastEnabled": "Last Enabled",
 
77
    "ApprovalPending": "Approval Is Pending",
 
78
    "ApprovedByDefault": "Approved By Default",
 
79
    "ApprovalDelay": "Approval Delay",
 
80
    "ApprovalDuration": "Approval Duration",
 
81
    "Checker": "Checker",
 
82
    "ExtendedTimeout": "Extended Timeout",
 
83
    "Expires": "Expires",
 
84
    "LastCheckerStatus": "Last Checker Status",
 
85
}
 
86
defaultkeywords = ("Name", "Enabled", "Timeout", "LastCheckedOK")
 
87
domain = "se.recompile"
 
88
busname = domain + ".Mandos"
 
89
server_path = "/"
 
90
server_interface = domain + ".Mandos"
 
91
client_interface = domain + ".Mandos.Client"
 
92
version = "1.8.3"
 
93
 
 
94
 
 
95
try:
 
96
    dbus.OBJECT_MANAGER_IFACE
 
97
except AttributeError:
 
98
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
99
 
 
100
 
 
101
def milliseconds_to_string(ms):
 
102
    td = datetime.timedelta(0, 0, 0, ms)
 
103
    return ("{days}{hours:02}:{minutes:02}:{seconds:02}"
 
104
            .format(days="{}T".format(td.days) if td.days else "",
 
105
                    hours=td.seconds // 3600,
 
106
                    minutes=(td.seconds % 3600) // 60,
 
107
                    seconds=td.seconds % 60))
 
108
 
 
109
 
 
110
def rfc3339_duration_to_delta(duration):
 
111
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
112
 
 
113
    >>> rfc3339_duration_to_delta("P7D")
 
114
    datetime.timedelta(7)
 
115
    >>> rfc3339_duration_to_delta("PT60S")
 
116
    datetime.timedelta(0, 60)
 
117
    >>> rfc3339_duration_to_delta("PT60M")
 
118
    datetime.timedelta(0, 3600)
 
119
    >>> rfc3339_duration_to_delta("P60M")
 
120
    datetime.timedelta(1680)
 
121
    >>> rfc3339_duration_to_delta("PT24H")
 
122
    datetime.timedelta(1)
 
123
    >>> rfc3339_duration_to_delta("P1W")
 
124
    datetime.timedelta(7)
 
125
    >>> rfc3339_duration_to_delta("PT5M30S")
 
126
    datetime.timedelta(0, 330)
 
127
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
128
    datetime.timedelta(1, 200)
 
129
    >>> # Can not be empty:
 
130
    >>> rfc3339_duration_to_delta("")
 
131
    Traceback (most recent call last):
 
132
    ...
 
133
    ValueError: Invalid RFC 3339 duration: u''
 
134
    >>> # Must start with "P":
 
135
    >>> rfc3339_duration_to_delta("1D")
 
136
    Traceback (most recent call last):
 
137
    ...
 
138
    ValueError: Invalid RFC 3339 duration: u'1D'
 
139
    >>> # Must use correct order
 
140
    >>> rfc3339_duration_to_delta("PT1S2M")
 
141
    Traceback (most recent call last):
 
142
    ...
 
143
    ValueError: Invalid RFC 3339 duration: u'PT1S2M'
 
144
    >>> # Time needs time marker
 
145
    >>> rfc3339_duration_to_delta("P1H2S")
 
146
    Traceback (most recent call last):
 
147
    ...
 
148
    ValueError: Invalid RFC 3339 duration: u'P1H2S'
 
149
    >>> # Weeks can not be combined with anything else
 
150
    >>> rfc3339_duration_to_delta("P1D2W")
 
151
    Traceback (most recent call last):
 
152
    ...
 
153
    ValueError: Invalid RFC 3339 duration: u'P1D2W'
 
154
    >>> rfc3339_duration_to_delta("P2W2H")
 
155
    Traceback (most recent call last):
 
156
    ...
 
157
    ValueError: Invalid RFC 3339 duration: u'P2W2H'
 
158
    """
 
159
 
 
160
    # Parsing an RFC 3339 duration with regular expressions is not
 
161
    # possible - there would have to be multiple places for the same
 
162
    # values, like seconds.  The current code, while more esoteric, is
 
163
    # cleaner without depending on a parsing library.  If Python had a
 
164
    # built-in library for parsing we would use it, but we'd like to
 
165
    # avoid excessive use of external libraries.
 
166
 
 
167
    # New type for defining tokens, syntax, and semantics all-in-one
 
168
    Token = collections.namedtuple("Token", (
 
169
        "regexp",  # To match token; if "value" is not None, must have
 
170
                   # a "group" containing digits
 
171
        "value",   # datetime.timedelta or None
 
172
        "followers"))           # Tokens valid after this token
 
173
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
174
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
175
    token_end = Token(re.compile(r"$"), None, frozenset())
 
176
    token_second = Token(re.compile(r"(\d+)S"),
 
177
                         datetime.timedelta(seconds=1),
 
178
                         frozenset((token_end, )))
 
179
    token_minute = Token(re.compile(r"(\d+)M"),
 
180
                         datetime.timedelta(minutes=1),
 
181
                         frozenset((token_second, token_end)))
 
182
    token_hour = Token(re.compile(r"(\d+)H"),
 
183
                       datetime.timedelta(hours=1),
 
184
                       frozenset((token_minute, token_end)))
 
185
    token_time = Token(re.compile(r"T"),
 
186
                       None,
 
187
                       frozenset((token_hour, token_minute,
 
188
                                  token_second)))
 
189
    token_day = Token(re.compile(r"(\d+)D"),
 
190
                      datetime.timedelta(days=1),
 
191
                      frozenset((token_time, token_end)))
 
192
    token_month = Token(re.compile(r"(\d+)M"),
 
193
                        datetime.timedelta(weeks=4),
 
194
                        frozenset((token_day, token_end)))
 
195
    token_year = Token(re.compile(r"(\d+)Y"),
 
196
                       datetime.timedelta(weeks=52),
 
197
                       frozenset((token_month, token_end)))
 
198
    token_week = Token(re.compile(r"(\d+)W"),
 
199
                       datetime.timedelta(weeks=1),
 
200
                       frozenset((token_end, )))
 
201
    token_duration = Token(re.compile(r"P"), None,
 
202
                           frozenset((token_year, token_month,
 
203
                                      token_day, token_time,
 
204
                                      token_week)))
 
205
    # Define starting values:
 
206
    # Value so far
 
207
    value = datetime.timedelta()
 
208
    found_token = None
 
209
    # Following valid tokens
 
210
    followers = frozenset((token_duration, ))
 
211
    # String left to parse
 
212
    s = duration
 
213
    # Loop until end token is found
 
214
    while found_token is not token_end:
 
215
        # Search for any currently valid tokens
 
216
        for token in followers:
 
217
            match = token.regexp.match(s)
 
218
            if match is not None:
 
219
                # Token found
 
220
                if token.value is not None:
 
221
                    # Value found, parse digits
 
222
                    factor = int(match.group(1), 10)
 
223
                    # Add to value so far
 
224
                    value += factor * token.value
 
225
                # Strip token from string
 
226
                s = token.regexp.sub("", s, 1)
 
227
                # Go to found token
 
228
                found_token = token
 
229
                # Set valid next tokens
 
230
                followers = found_token.followers
 
231
                break
 
232
        else:
 
233
            # No currently valid tokens were found
 
234
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
235
                             .format(duration))
 
236
    # End token found
 
237
    return value
 
238
 
 
239
 
 
240
def string_to_delta(interval):
 
241
    """Parse a string and return a datetime.timedelta
 
242
 
 
243
    >>> string_to_delta('7d')
 
244
    datetime.timedelta(7)
 
245
    >>> string_to_delta('60s')
 
246
    datetime.timedelta(0, 60)
 
247
    >>> string_to_delta('60m')
 
248
    datetime.timedelta(0, 3600)
 
249
    >>> string_to_delta('24h')
 
250
    datetime.timedelta(1)
 
251
    >>> string_to_delta('1w')
 
252
    datetime.timedelta(7)
 
253
    >>> string_to_delta('5m 30s')
 
254
    datetime.timedelta(0, 330)
 
255
    """
 
256
 
 
257
    try:
 
258
        return rfc3339_duration_to_delta(interval)
 
259
    except ValueError:
 
260
        pass
 
261
 
 
262
    value = datetime.timedelta(0)
 
263
    regexp = re.compile(r"(\d+)([dsmhw]?)")
 
264
 
 
265
    for num, suffix in regexp.findall(interval):
 
266
        if suffix == "d":
 
267
            value += datetime.timedelta(int(num))
 
268
        elif suffix == "s":
 
269
            value += datetime.timedelta(0, int(num))
 
270
        elif suffix == "m":
 
271
            value += datetime.timedelta(0, 0, 0, 0, int(num))
 
272
        elif suffix == "h":
 
273
            value += datetime.timedelta(0, 0, 0, 0, 0, int(num))
 
274
        elif suffix == "w":
 
275
            value += datetime.timedelta(0, 0, 0, 0, 0, 0, int(num))
 
276
        elif suffix == "":
 
277
            value += datetime.timedelta(0, 0, 0, int(num))
 
278
    return value
 
279
 
 
280
 
 
281
def print_clients(clients, keywords):
 
282
    def valuetostring(value, keyword):
 
283
        if isinstance(value, dbus.Boolean):
 
284
            return "Yes" if value else "No"
 
285
        if keyword in ("Timeout", "Interval", "ApprovalDelay",
 
286
                       "ApprovalDuration", "ExtendedTimeout"):
 
287
            return milliseconds_to_string(value)
 
288
        return str(value)
 
289
 
 
290
    # Create format string to print table rows
 
291
    format_string = " ".join("{{{key}:{width}}}".format(
 
292
        width=max(len(tablewords[key]),
 
293
                  max(len(valuetostring(client[key], key))
 
294
                      for client in clients)),
 
295
        key=key)
 
296
                             for key in keywords)
 
297
    # Print header line
 
298
    print(format_string.format(**tablewords))
 
299
    for client in clients:
 
300
        print(format_string
 
301
              .format(**{key: valuetostring(client[key], key)
 
302
                         for key in keywords}))
 
303
 
 
304
 
 
305
def has_actions(options):
 
306
    return any((options.enable,
 
307
                options.disable,
 
308
                options.bump_timeout,
 
309
                options.start_checker,
 
310
                options.stop_checker,
 
311
                options.is_enabled,
 
312
                options.remove,
 
313
                options.checker is not None,
 
314
                options.timeout is not None,
 
315
                options.extended_timeout is not None,
 
316
                options.interval is not None,
 
317
                options.approved_by_default is not None,
 
318
                options.approval_delay is not None,
 
319
                options.approval_duration is not None,
 
320
                options.host is not None,
 
321
                options.secret is not None,
 
322
                options.approve,
 
323
                options.deny))
 
324
 
 
325
 
 
326
def main():
 
327
    parser = argparse.ArgumentParser()
 
328
    parser.add_argument("--version", action="version",
 
329
                        version="%(prog)s {}".format(version),
 
330
                        help="show version number and exit")
 
331
    parser.add_argument("-a", "--all", action="store_true",
 
332
                        help="Select all clients")
 
333
    parser.add_argument("-v", "--verbose", action="store_true",
 
334
                        help="Print all fields")
 
335
    parser.add_argument("-j", "--dump-json", action="store_true",
 
336
                        help="Dump client data in JSON format")
 
337
    parser.add_argument("-e", "--enable", action="store_true",
 
338
                        help="Enable client")
 
339
    parser.add_argument("-d", "--disable", action="store_true",
 
340
                        help="disable client")
 
341
    parser.add_argument("-b", "--bump-timeout", action="store_true",
 
342
                        help="Bump timeout for client")
 
343
    parser.add_argument("--start-checker", action="store_true",
 
344
                        help="Start checker for client")
 
345
    parser.add_argument("--stop-checker", action="store_true",
 
346
                        help="Stop checker for client")
 
347
    parser.add_argument("-V", "--is-enabled", action="store_true",
 
348
                        help="Check if client is enabled")
 
349
    parser.add_argument("-r", "--remove", action="store_true",
 
350
                        help="Remove client")
 
351
    parser.add_argument("-c", "--checker",
 
352
                        help="Set checker command for client")
 
353
    parser.add_argument("-t", "--timeout",
 
354
                        help="Set timeout for client")
 
355
    parser.add_argument("--extended-timeout",
 
356
                        help="Set extended timeout for client")
 
357
    parser.add_argument("-i", "--interval",
 
358
                        help="Set checker interval for client")
 
359
    parser.add_argument("--approve-by-default", action="store_true",
 
360
                        default=None, dest="approved_by_default",
 
361
                        help="Set client to be approved by default")
 
362
    parser.add_argument("--deny-by-default", action="store_false",
 
363
                        dest="approved_by_default",
 
364
                        help="Set client to be denied by default")
 
365
    parser.add_argument("--approval-delay",
 
366
                        help="Set delay before client approve/deny")
 
367
    parser.add_argument("--approval-duration",
 
368
                        help="Set duration of one client approval")
 
369
    parser.add_argument("-H", "--host", help="Set host for client")
 
370
    parser.add_argument("-s", "--secret",
 
371
                        type=argparse.FileType(mode="rb"),
 
372
                        help="Set password blob (file) for client")
 
373
    parser.add_argument("-A", "--approve", action="store_true",
 
374
                        help="Approve any current client request")
 
375
    parser.add_argument("-D", "--deny", action="store_true",
 
376
                        help="Deny any current client request")
 
377
    parser.add_argument("--check", action="store_true",
 
378
                        help="Run self-test")
 
379
    parser.add_argument("client", nargs="*", help="Client name")
 
380
    options = parser.parse_args()
 
381
 
 
382
    if has_actions(options) and not (options.client or options.all):
 
383
        parser.error("Options require clients names or --all.")
 
384
    if options.verbose and has_actions(options):
 
385
        parser.error("--verbose can only be used alone.")
 
386
    if options.dump_json and (options.verbose
 
387
                              or has_actions(options)):
 
388
        parser.error("--dump-json can only be used alone.")
 
389
    if options.all and not has_actions(options):
 
390
        parser.error("--all requires an action.")
 
391
 
 
392
    try:
 
393
        bus = dbus.SystemBus()
 
394
        mandos_dbus_objc = bus.get_object(busname, server_path)
 
395
    except dbus.exceptions.DBusException:
 
396
        log.critical("Could not connect to Mandos server")
 
397
        sys.exit(1)
 
398
 
 
399
    mandos_serv = dbus.Interface(mandos_dbus_objc,
 
400
                                 dbus_interface=server_interface)
 
401
    mandos_serv_object_manager = dbus.Interface(
 
402
        mandos_dbus_objc, dbus_interface=dbus.OBJECT_MANAGER_IFACE)
 
403
 
 
404
    # block stderr since dbus library prints to stderr
 
405
    null = os.open(os.path.devnull, os.O_RDWR)
 
406
    stderrcopy = os.dup(sys.stderr.fileno())
 
407
    os.dup2(null, sys.stderr.fileno())
 
408
    os.close(null)
 
409
    try:
 
410
        try:
 
411
            mandos_clients = {path: ifs_and_props[client_interface]
 
412
                              for path, ifs_and_props in
 
413
                              mandos_serv_object_manager
 
414
                              .GetManagedObjects().items()
 
415
                              if client_interface in ifs_and_props}
 
416
        finally:
 
417
            # restore stderr
 
418
            os.dup2(stderrcopy, sys.stderr.fileno())
 
419
            os.close(stderrcopy)
 
420
    except dbus.exceptions.DBusException as e:
 
421
        log.critical("Failed to access Mandos server through D-Bus:"
 
422
                     "\n%s", e)
 
423
        sys.exit(1)
 
424
 
 
425
    # Compile dict of (clients: properties) to process
 
426
    clients = {}
 
427
 
 
428
    if options.all or not options.client:
 
429
        clients = {bus.get_object(busname, path): properties
 
430
                   for path, properties in mandos_clients.items()}
 
431
    else:
 
432
        for name in options.client:
 
433
            for path, client in mandos_clients.items():
 
434
                if client["Name"] == name:
 
435
                    client_objc = bus.get_object(busname, path)
 
436
                    clients[client_objc] = client
 
437
                    break
 
438
            else:
 
439
                log.critical("Client not found on server: %r", name)
 
440
                sys.exit(1)
 
441
 
 
442
    if not has_actions(options) and clients:
 
443
        if options.verbose or options.dump_json:
 
444
            keywords = ("Name", "Enabled", "Timeout", "LastCheckedOK",
 
445
                        "Created", "Interval", "Host", "KeyID",
 
446
                        "Fingerprint", "CheckerRunning",
 
447
                        "LastEnabled", "ApprovalPending",
 
448
                        "ApprovedByDefault", "LastApprovalRequest",
 
449
                        "ApprovalDelay", "ApprovalDuration",
 
450
                        "Checker", "ExtendedTimeout", "Expires",
 
451
                        "LastCheckerStatus")
 
452
        else:
 
453
            keywords = defaultkeywords
 
454
 
 
455
        if options.dump_json:
 
456
            json.dump({client["Name"]: {key:
 
457
                                        bool(client[key])
 
458
                                        if isinstance(client[key],
 
459
                                                      dbus.Boolean)
 
460
                                        else client[key]
 
461
                                        for key in keywords}
 
462
                       for client in clients.values()},
 
463
                      fp=sys.stdout, indent=4,
 
464
                      separators=(',', ': '))
 
465
            print()
 
466
        else:
 
467
            print_clients(clients.values(), keywords)
 
468
    else:
 
469
        # Process each client in the list by all selected options
 
470
        for client in clients:
 
471
 
 
472
            def set_client_prop(prop, value):
 
473
                """Set a Client D-Bus property"""
 
474
                client.Set(client_interface, prop, value,
 
475
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
476
 
 
477
            def set_client_prop_ms(prop, value):
 
478
                """Set a Client D-Bus property, converted
 
479
                from a string to milliseconds."""
 
480
                set_client_prop(prop,
 
481
                                string_to_delta(value).total_seconds()
 
482
                                * 1000)
 
483
 
 
484
            if options.remove:
 
485
                mandos_serv.RemoveClient(client.__dbus_object_path__)
 
486
            if options.enable:
 
487
                set_client_prop("Enabled", dbus.Boolean(True))
 
488
            if options.disable:
 
489
                set_client_prop("Enabled", dbus.Boolean(False))
 
490
            if options.bump_timeout:
 
491
                set_client_prop("LastCheckedOK", "")
 
492
            if options.start_checker:
 
493
                set_client_prop("CheckerRunning", dbus.Boolean(True))
 
494
            if options.stop_checker:
 
495
                set_client_prop("CheckerRunning", dbus.Boolean(False))
 
496
            if options.is_enabled:
 
497
                if client.Get(client_interface, "Enabled",
 
498
                              dbus_interface=dbus.PROPERTIES_IFACE):
 
499
                    sys.exit(0)
 
500
                else:
 
501
                    sys.exit(1)
 
502
            if options.checker is not None:
 
503
                set_client_prop("Checker", options.checker)
 
504
            if options.host is not None:
 
505
                set_client_prop("Host", options.host)
 
506
            if options.interval is not None:
 
507
                set_client_prop_ms("Interval", options.interval)
 
508
            if options.approval_delay is not None:
 
509
                set_client_prop_ms("ApprovalDelay",
 
510
                                   options.approval_delay)
 
511
            if options.approval_duration is not None:
 
512
                set_client_prop_ms("ApprovalDuration",
 
513
                                   options.approval_duration)
 
514
            if options.timeout is not None:
 
515
                set_client_prop_ms("Timeout", options.timeout)
 
516
            if options.extended_timeout is not None:
 
517
                set_client_prop_ms("ExtendedTimeout",
 
518
                                   options.extended_timeout)
 
519
            if options.secret is not None:
 
520
                set_client_prop("Secret",
 
521
                                dbus.ByteArray(options.secret.read()))
 
522
            if options.approved_by_default is not None:
 
523
                set_client_prop("ApprovedByDefault",
 
524
                                dbus.Boolean(options
 
525
                                             .approved_by_default))
 
526
            if options.approve:
 
527
                client.Approve(dbus.Boolean(True),
 
528
                               dbus_interface=client_interface)
 
529
            elif options.deny:
 
530
                client.Approve(dbus.Boolean(False),
 
531
                               dbus_interface=client_interface)
 
532
 
 
533
 
 
534
class Test_milliseconds_to_string(unittest.TestCase):
 
535
    def test_all(self):
 
536
        self.assertEqual(milliseconds_to_string(93785000),
 
537
                         "1T02:03:05")
 
538
    def test_no_days(self):
 
539
        self.assertEqual(milliseconds_to_string(7385000), "02:03:05")
 
540
    def test_all_zero(self):
 
541
        self.assertEqual(milliseconds_to_string(0), "00:00:00")
 
542
    def test_no_fractional_seconds(self):
 
543
        self.assertEqual(milliseconds_to_string(400), "00:00:00")
 
544
        self.assertEqual(milliseconds_to_string(900), "00:00:00")
 
545
        self.assertEqual(milliseconds_to_string(1900), "00:00:01")
 
546
 
 
547
 
 
548
def should_only_run_tests():
 
549
    parser = argparse.ArgumentParser(add_help=False)
 
550
    parser.add_argument("--check", action='store_true')
 
551
    args, unknown_args = parser.parse_known_args()
 
552
    run_tests = args.check
 
553
    if run_tests:
 
554
        # Remove --check argument from sys.argv
 
555
        sys.argv[1:] = unknown_args
 
556
    return run_tests
 
557
 
 
558
# Add all tests from doctest strings
 
559
def load_tests(loader, tests, none):
 
560
    import doctest
 
561
    tests.addTests(doctest.DocTestSuite())
 
562
    return tests
 
563
 
 
564
if __name__ == "__main__":
 
565
    if should_only_run_tests():
 
566
        # Call using ./tdd-python-script --check [--verbose]
 
567
        unittest.main()
 
568
    else:
 
569
        main()