test/framework.py

   1 #!/usr/bin/env python
   2
   3 from __future__ import print_function
   4 import gc
   5 import sys
   6 import os
   7 import select
   8 import unittest
   9 import tempfile
  10 import time
  11 import faulthandler
  12 import random
  13 import copy
  14 import psutil
  15 import platform
  16 from collections import deque
  17 from threading import Thread, Event
  18 from inspect import getdoc, isclass
  19 from traceback import format_exception
  20 from logging import FileHandler, DEBUG, Formatter
  21
  22 import scapy.compat
  23 from scapy.packet import Raw
  24 from hook import StepHook, PollHook, VppDiedError
  25 from vpp_pg_interface import VppPGInterface
  26 from vpp_sub_interface import VppSubInterface
  27 from vpp_lo_interface import VppLoInterface
  28 from vpp_bvi_interface import VppBviInterface
  29 from vpp_papi_provider import VppPapiProvider
  30 from vpp_papi.vpp_stats import VPPStats
  31 from log import RED, GREEN, YELLOW, double_line_delim, single_line_delim, \
  32     get_logger, colorize
  33 from vpp_object import VppObjectRegistry
  34 from util import ppp, is_core_present
  35 from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
  36 from scapy.layers.inet6 import ICMPv6DestUnreach, ICMPv6EchoRequest
  37 from scapy.layers.inet6 import ICMPv6EchoReply
  38
  39 if os.name == 'posix' and sys.version_info[0] < 3:
  40     # using subprocess32 is recommended by python official documentation
  41     # @ https://docs.python.org/2/library/subprocess.html
  42     import subprocess32 as subprocess
  43 else:
  44     import subprocess
  45
  46 #  Python2/3 compatible
  47 try:
  48     input = raw_input
  49 except NameError:
  50     pass
  51
  52 PASS = 0
  53 FAIL = 1
  54 ERROR = 2
  55 SKIP = 3
  56 TEST_RUN = 4
  57
  58 debug_framework = False
  59 if os.getenv('TEST_DEBUG', "0") == "1":
  60     debug_framework = True
  61     import debug_internal
  62
  63 """
  64   Test framework module.
  65
  66   The module provides a set of tools for constructing and running tests and
  67   representing the results.
  68 """
  69
  70
  71 class _PacketInfo(object):
  72     """Private class to create packet info object.
  73
  74     Help process information about the next packet.
  75     Set variables to default values.
  76     """
  77     #: Store the index of the packet.
  78     index = -1
  79     #: Store the index of the source packet generator interface of the packet.
  80     src = -1
  81     #: Store the index of the destination packet generator interface
  82     #: of the packet.
  83     dst = -1
  84     #: Store expected ip version
  85     ip = -1
  86     #: Store expected upper protocol
  87     proto = -1
  88     #: Store the copy of the former packet.
  89     data = None
  90
  91     def __eq__(self, other):
  92         index = self.index == other.index
  93         src = self.src == other.src
  94         dst = self.dst == other.dst
  95         data = self.data == other.data
  96         return index and src and dst and data
  97
  98
  99 def pump_output(testclass):
 100     """ pump output from vpp stdout/stderr to proper queues """
 101     stdout_fragment = ""
 102     stderr_fragment = ""
 103     while not testclass.pump_thread_stop_flag.is_set():
 104         readable = select.select([testclass.vpp.stdout.fileno(),
 105                                   testclass.vpp.stderr.fileno(),
 106                                   testclass.pump_thread_wakeup_pipe[0]],
 107                                  [], [])[0]
 108         if testclass.vpp.stdout.fileno() in readable:
 109             read = os.read(testclass.vpp.stdout.fileno(), 102400)
 110             if len(read) > 0:
 111                 split = read.splitlines(True)
 112                 if len(stdout_fragment) > 0:
 113                     split[0] = "%s%s" % (stdout_fragment, split[0])
 114                 if len(split) > 0 and split[-1].endswith("\n"):
 115                     limit = None
 116                 else:
 117                     limit = -1
 118                     stdout_fragment = split[-1]
 119                 testclass.vpp_stdout_deque.extend(split[:limit])
 120                 if not testclass.cache_vpp_output:
 121                     for line in split[:limit]:
 122                         testclass.logger.debug(
 123                             "VPP STDOUT: %s" % line.rstrip("\n"))
 124         if testclass.vpp.stderr.fileno() in readable:
 125             read = os.read(testclass.vpp.stderr.fileno(), 102400)
 126             if len(read) > 0:
 127                 split = read.splitlines(True)
 128                 if len(stderr_fragment) > 0:
 129                     split[0] = "%s%s" % (stderr_fragment, split[0])
 130                 if len(split) > 0 and split[-1].endswith(b"\n"):
 131                     limit = None
 132                 else:
 133                     limit = -1
 134                     stderr_fragment = split[-1]
 135                 testclass.vpp_stderr_deque.extend(split[:limit])
 136                 if not testclass.cache_vpp_output:
 137                     for line in split[:limit]:
 138                         testclass.logger.debug(
 139                             "VPP STDERR: %s" % line.rstrip("\n"))
 140                         # ignoring the dummy pipe here intentionally - the
 141                         # flag will take care of properly terminating the loop
 142
 143
 144 def _is_skip_aarch64_set():
 145     return os.getenv('SKIP_AARCH64', 'n').lower() in ('yes', 'y', '1')
 146
 147 is_skip_aarch64_set = _is_skip_aarch64_set()
 148
 149
 150 def _is_platform_aarch64():
 151     return platform.machine() == 'aarch64'
 152
 153 is_platform_aarch64 = _is_platform_aarch64()
 154
 155
 156 def _running_extended_tests():
 157     s = os.getenv("EXTENDED_TESTS", "n")
 158     return True if s.lower() in ("y", "yes", "1") else False
 159
 160 running_extended_tests = _running_extended_tests()
 161
 162
 163 def _running_on_centos():
 164     os_id = os.getenv("OS_ID", "")
 165     return True if "centos" in os_id.lower() else False
 166
 167 running_on_centos = _running_on_centos
 168
 169
 170 class KeepAliveReporter(object):
 171     """
 172     Singleton object which reports test start to parent process
 173     """
 174     _shared_state = {}
 175
 176     def __init__(self):
 177         self.__dict__ = self._shared_state
 178         self._pipe = None
 179
 180     @property
 181     def pipe(self):
 182         return self._pipe
 183
 184     @pipe.setter
 185     def pipe(self, pipe):
 186         if self._pipe is not None:
 187             raise Exception("Internal error - pipe should only be set once.")
 188         self._pipe = pipe
 189
 190     def send_keep_alive(self, test, desc=None):
 191         """
 192         Write current test tmpdir & desc to keep-alive pipe to signal liveness
 193         """
 194         if self.pipe is None:
 195             # if not running forked..
 196             return
 197
 198         if isclass(test):
 199             desc = '%s (%s)' % (desc, unittest.util.strclass(test))
 200         else:
 201             desc = test.id()
 202
 203         self.pipe.send((desc, test.vpp_bin, test.tempdir, test.vpp.pid))
 204
 205
 206 class VppTestCase(unittest.TestCase):
 207     """This subclass is a base class for VPP test cases that are implemented as
 208     classes. It provides methods to create and run test case.
 209     """
 210
 211     extra_vpp_punt_config = []
 212     extra_vpp_plugin_config = []
 213
 214     @property
 215     def packet_infos(self):
 216         """List of packet infos"""
 217         return self._packet_infos
 218
 219     @classmethod
 220     def get_packet_count_for_if_idx(cls, dst_if_index):
 221         """Get the number of packet info for specified destination if index"""
 222         if dst_if_index in cls._packet_count_for_dst_if_idx:
 223             return cls._packet_count_for_dst_if_idx[dst_if_index]
 224         else:
 225             return 0
 226
 227     @classmethod
 228     def instance(cls):
 229         """Return the instance of this testcase"""
 230         return cls.test_instance
 231
 232     @classmethod
 233     def set_debug_flags(cls, d):
 234         cls.debug_core = False
 235         cls.debug_gdb = False
 236         cls.debug_gdbserver = False
 237         if d is None:
 238             return
 239         dl = d.lower()
 240         if dl == "core":
 241             cls.debug_core = True
 242         elif dl == "gdb":
 243             cls.debug_gdb = True
 244         elif dl == "gdbserver":
 245             cls.debug_gdbserver = True
 246         else:
 247             raise Exception("Unrecognized DEBUG option: '%s'" % d)
 248
 249     @staticmethod
 250     def get_least_used_cpu():
 251         cpu_usage_list = [set(range(psutil.cpu_count()))]
 252         vpp_processes = [p for p in psutil.process_iter(attrs=['pid', 'name'])
 253                          if 'vpp_main' == p.info['name']]
 254         for vpp_process in vpp_processes:
 255             for cpu_usage_set in cpu_usage_list:
 256                 try:
 257                     cpu_num = vpp_process.cpu_num()
 258                     if cpu_num in cpu_usage_set:
 259                         cpu_usage_set_index = cpu_usage_list.index(
 260                             cpu_usage_set)
 261                         if cpu_usage_set_index == len(cpu_usage_list) - 1:
 262                             cpu_usage_list.append({cpu_num})
 263                         else:
 264                             cpu_usage_list[cpu_usage_set_index + 1].add(
 265                                 cpu_num)
 266                         cpu_usage_set.remove(cpu_num)
 267                         break
 268                 except psutil.NoSuchProcess:
 269                     pass
 270
 271         for cpu_usage_set in cpu_usage_list:
 272             if len(cpu_usage_set) > 0:
 273                 min_usage_set = cpu_usage_set
 274                 break
 275
 276         return random.choice(tuple(min_usage_set))
 277
 278     @classmethod
 279     def setUpConstants(cls):
 280         """ Set-up the test case class based on environment variables """
 281         s = os.getenv("STEP", "n")
 282         cls.step = True if s.lower() in ("y", "yes", "1") else False
 283         d = os.getenv("DEBUG", None)
 284         c = os.getenv("CACHE_OUTPUT", "1")
 285         cls.cache_vpp_output = False if c.lower() in ("n", "no", "0") else True
 286         cls.set_debug_flags(d)
 287         cls.vpp_bin = os.getenv('VPP_BIN', "vpp")
 288         cls.plugin_path = os.getenv('VPP_PLUGIN_PATH')
 289         cls.extern_plugin_path = os.getenv('EXTERN_PLUGINS')
 290         plugin_path = None
 291         if cls.plugin_path is not None:
 292             if cls.extern_plugin_path is not None:
 293                 plugin_path = "%s:%s" % (
 294                     cls.plugin_path, cls.extern_plugin_path)
 295             else:
 296                 plugin_path = cls.plugin_path
 297         elif cls.extern_plugin_path is not None:
 298             plugin_path = cls.extern_plugin_path
 299         debug_cli = ""
 300         if cls.step or cls.debug_gdb or cls.debug_gdbserver:
 301             debug_cli = "cli-listen localhost:5002"
 302         coredump_size = None
 303         size = os.getenv("COREDUMP_SIZE")
 304         if size is not None:
 305             coredump_size = "coredump-size %s" % size
 306         if coredump_size is None:
 307             coredump_size = "coredump-size unlimited"
 308
 309         cpu_core_number = cls.get_least_used_cpu()
 310
 311         cls.vpp_cmdline = [cls.vpp_bin, "unix",
 312                            "{", "nodaemon", debug_cli, "full-coredump",
 313                            coredump_size, "runtime-dir", cls.tempdir, "}",
 314                            "api-trace", "{", "on", "}", "api-segment", "{",
 315                            "prefix", cls.shm_prefix, "}", "cpu", "{",
 316                            "main-core", str(cpu_core_number), "}", "statseg",
 317                            "{", "socket-name", cls.stats_sock, "}", "plugins",
 318                            "{", "plugin", "dpdk_plugin.so", "{", "disable",
 319                            "}", "plugin", "unittest_plugin.so", "{", "enable",
 320                            "}"] + cls.extra_vpp_plugin_config + ["}", ]
 321         if cls.extra_vpp_punt_config is not None:
 322             cls.vpp_cmdline.extend(cls.extra_vpp_punt_config)
 323         if plugin_path is not None:
 324             cls.vpp_cmdline.extend(["plugin_path", plugin_path])
 325         cls.logger.info("vpp_cmdline args: %s" % cls.vpp_cmdline)
 326         cls.logger.info("vpp_cmdline: %s" % " ".join(cls.vpp_cmdline))
 327
 328     @classmethod
 329     def wait_for_enter(cls):
 330         if cls.debug_gdbserver:
 331             print(double_line_delim)
 332             print("Spawned GDB server with PID: %d" % cls.vpp.pid)
 333         elif cls.debug_gdb:
 334             print(double_line_delim)
 335             print("Spawned VPP with PID: %d" % cls.vpp.pid)
 336         else:
 337             cls.logger.debug("Spawned VPP with PID: %d" % cls.vpp.pid)
 338             return
 339         print(single_line_delim)
 340         print("You can debug the VPP using e.g.:")
 341         if cls.debug_gdbserver:
 342             print("gdb " + cls.vpp_bin + " -ex 'target remote localhost:7777'")
 343             print("Now is the time to attach a gdb by running the above "
 344                   "command, set up breakpoints etc. and then resume VPP from "
 345                   "within gdb by issuing the 'continue' command")
 346         elif cls.debug_gdb:
 347             print("gdb " + cls.vpp_bin + " -ex 'attach %s'" % cls.vpp.pid)
 348             print("Now is the time to attach a gdb by running the above "
 349                   "command and set up breakpoints etc.")
 350         print(single_line_delim)
 351         input("Press ENTER to continue running the testcase...")
 352
 353     @classmethod
 354     def run_vpp(cls):
 355         cmdline = cls.vpp_cmdline
 356
 357         if cls.debug_gdbserver:
 358             gdbserver = '/usr/bin/gdbserver'
 359             if not os.path.isfile(gdbserver) or \
 360                     not os.access(gdbserver, os.X_OK):
 361                 raise Exception("gdbserver binary '%s' does not exist or is "
 362                                 "not executable" % gdbserver)
 363
 364             cmdline = [gdbserver, 'localhost:7777'] + cls.vpp_cmdline
 365             cls.logger.info("Gdbserver cmdline is %s", " ".join(cmdline))
 366
 367         try:
 368             cls.vpp = subprocess.Popen(cmdline,
 369                                        stdout=subprocess.PIPE,
 370                                        stderr=subprocess.PIPE,
 371                                        bufsize=1)
 372         except subprocess.CalledProcessError as e:
 373             cls.logger.critical("Subprocess returned with non-0 return code: ("
 374                                 "%s)", e.returncode)
 375             raise
 376         except OSError as e:
 377             cls.logger.critical("Subprocess returned with OS error: "
 378                                 "(%s) %s", e.errno, e.strerror)
 379             raise
 380         except Exception as e:
 381             cls.logger.exception("Subprocess returned unexpected from "
 382                                  "%s:", cmdline)
 383             raise
 384
 385         cls.wait_for_enter()
 386
 387     @classmethod
 388     def wait_for_stats_socket(cls):
 389         deadline = time.time() + 3
 390         ok = False
 391         while time.time() < deadline or \
 392                 cls.debug_gdb or cls.debug_gdbserver:
 393             if os.path.exists(cls.stats_sock):
 394                 ok = True
 395                 break
 396             cls.sleep(0.8)
 397         if not ok:
 398             cls.logger.critical("Couldn't stat : {}".format(cls.stats_sock))
 399
 400     @classmethod
 401     def setUpClass(cls):
 402         """
 403         Perform class setup before running the testcase
 404         Remove shared memory files, start vpp and connect the vpp-api
 405         """
 406         super(VppTestCase, cls).setUpClass()
 407         gc.collect()  # run garbage collection first
 408         random.seed()
 409         cls.logger = get_logger(cls.__name__)
 410         if hasattr(cls, 'parallel_handler'):
 411             cls.logger.addHandler(cls.parallel_handler)
 412             cls.logger.propagate = False
 413         cls.tempdir = tempfile.mkdtemp(
 414             prefix='vpp-unittest-%s-' % cls.__name__)
 415         cls.stats_sock = "%s/stats.sock" % cls.tempdir
 416         cls.file_handler = FileHandler("%s/log.txt" % cls.tempdir)
 417         cls.file_handler.setFormatter(
 418             Formatter(fmt='%(asctime)s,%(msecs)03d %(message)s',
 419                       datefmt="%H:%M:%S"))
 420         cls.file_handler.setLevel(DEBUG)
 421         cls.logger.addHandler(cls.file_handler)
 422         cls.shm_prefix = os.path.basename(cls.tempdir)
 423         os.chdir(cls.tempdir)
 424         cls.logger.info("Temporary dir is %s, shm prefix is %s",
 425                         cls.tempdir, cls.shm_prefix)
 426         cls.setUpConstants()
 427         cls.reset_packet_infos()
 428         cls._captures = []
 429         cls._zombie_captures = []
 430         cls.verbose = 0
 431         cls.vpp_dead = False
 432         cls.registry = VppObjectRegistry()
 433         cls.vpp_startup_failed = False
 434         cls.reporter = KeepAliveReporter()
 435         # need to catch exceptions here because if we raise, then the cleanup
 436         # doesn't get called and we might end with a zombie vpp
 437         try:
 438             cls.run_vpp()
 439             cls.reporter.send_keep_alive(cls, 'setUpClass')
 440             VppTestResult.current_test_case_info = TestCaseInfo(
 441                 cls.logger, cls.tempdir, cls.vpp.pid, cls.vpp_bin)
 442             cls.vpp_stdout_deque = deque()
 443             cls.vpp_stderr_deque = deque()
 444             cls.pump_thread_stop_flag = Event()
 445             cls.pump_thread_wakeup_pipe = os.pipe()
 446             cls.pump_thread = Thread(target=pump_output, args=(cls,))
 447             cls.pump_thread.daemon = True
 448             cls.pump_thread.start()
 449             if cls.debug_gdb or cls.debug_gdbserver:
 450                 read_timeout = 0
 451             else:
 452                 read_timeout = 5
 453             cls.vapi = VppPapiProvider(cls.shm_prefix, cls.shm_prefix, cls,
 454                                        read_timeout)
 455             if cls.step:
 456                 hook = StepHook(cls)
 457             else:
 458                 hook = PollHook(cls)
 459             cls.vapi.register_hook(hook)
 460             cls.wait_for_stats_socket()
 461             cls.statistics = VPPStats(socketname=cls.stats_sock)
 462             try:
 463                 hook.poll_vpp()
 464             except VppDiedError:
 465                 cls.vpp_startup_failed = True
 466                 cls.logger.critical(
 467                     "VPP died shortly after startup, check the"
 468                     " output to standard error for possible cause")
 469                 raise
 470             try:
 471                 cls.vapi.connect()
 472             except Exception:
 473                 try:
 474                     cls.vapi.disconnect()
 475                 except Exception:
 476                     pass
 477                 if cls.debug_gdbserver:
 478                     print(colorize("You're running VPP inside gdbserver but "
 479                                    "VPP-API connection failed, did you forget "
 480                                    "to 'continue' VPP from within gdb?", RED))
 481                 raise
 482         except Exception:
 483             try:
 484                 cls.quit()
 485             except Exception:
 486                 pass
 487             raise
 488
 489     @classmethod
 490     def quit(cls):
 491         """
 492         Disconnect vpp-api, kill vpp and cleanup shared memory files
 493         """
 494         if (cls.debug_gdbserver or cls.debug_gdb) and hasattr(cls, 'vpp'):
 495             cls.vpp.poll()
 496             if cls.vpp.returncode is None:
 497                 print(double_line_delim)
 498                 print("VPP or GDB server is still running")
 499                 print(single_line_delim)
 500                 input("When done debugging, press ENTER to kill the "
 501                       "process and finish running the testcase...")
 502
 503         # first signal that we want to stop the pump thread, then wake it up
 504         if hasattr(cls, 'pump_thread_stop_flag'):
 505             cls.pump_thread_stop_flag.set()
 506         if hasattr(cls, 'pump_thread_wakeup_pipe'):
 507             os.write(cls.pump_thread_wakeup_pipe[1], b'ding dong wake up')
 508         if hasattr(cls, 'pump_thread'):
 509             cls.logger.debug("Waiting for pump thread to stop")
 510             cls.pump_thread.join()
 511         if hasattr(cls, 'vpp_stderr_reader_thread'):
 512             cls.logger.debug("Waiting for stdderr pump to stop")
 513             cls.vpp_stderr_reader_thread.join()
 514
 515         if hasattr(cls, 'vpp'):
 516             if hasattr(cls, 'vapi'):
 517                 cls.logger.debug("Disconnecting class vapi client on %s",
 518                                  cls.__name__)
 519                 cls.vapi.disconnect()
 520                 cls.logger.debug("Deleting class vapi attribute on %s",
 521                                  cls.__name__)
 522                 del cls.vapi
 523             cls.vpp.poll()
 524             if cls.vpp.returncode is None:
 525                 cls.logger.debug("Sending TERM to vpp")
 526                 cls.vpp.kill()
 527                 cls.logger.debug("Waiting for vpp to die")
 528                 cls.vpp.communicate()
 529             cls.logger.debug("Deleting class vpp attribute on %s",
 530                              cls.__name__)
 531             del cls.vpp
 532
 533         if cls.vpp_startup_failed:
 534             stdout_log = cls.logger.info
 535             stderr_log = cls.logger.critical
 536         else:
 537             stdout_log = cls.logger.info
 538             stderr_log = cls.logger.info
 539
 540         if hasattr(cls, 'vpp_stdout_deque'):
 541             stdout_log(single_line_delim)
 542             stdout_log('VPP output to stdout while running %s:', cls.__name__)
 543             stdout_log(single_line_delim)
 544             vpp_output = "".join(cls.vpp_stdout_deque)
 545             with open(cls.tempdir + '/vpp_stdout.txt', 'w') as f:
 546                 f.write(vpp_output)
 547             stdout_log('\n%s', vpp_output)
 548             stdout_log(single_line_delim)
 549
 550         if hasattr(cls, 'vpp_stderr_deque'):
 551             stderr_log(single_line_delim)
 552             stderr_log('VPP output to stderr while running %s:', cls.__name__)
 553             stderr_log(single_line_delim)
 554             vpp_output = "".join(cls.vpp_stderr_deque)
 555             with open(cls.tempdir + '/vpp_stderr.txt', 'w') as f:
 556                 f.write(vpp_output)
 557             stderr_log('\n%s', vpp_output)
 558             stderr_log(single_line_delim)
 559
 560     @classmethod
 561     def tearDownClass(cls):
 562         """ Perform final cleanup after running all tests in this test-case """
 563         cls.reporter.send_keep_alive(cls, 'tearDownClass')
 564         cls.quit()
 565         cls.file_handler.close()
 566         cls.reset_packet_infos()
 567         if debug_framework:
 568             debug_internal.on_tear_down_class(cls)
 569
 570     def tearDown(self):
 571         """ Show various debug prints after each test """
 572         self.logger.debug("--- tearDown() for %s.%s(%s) called ---" %
 573                           (self.__class__.__name__, self._testMethodName,
 574                            self._testMethodDoc))
 575         if not self.vpp_dead:
 576             self.logger.debug(self.vapi.cli("show trace max 1000"))
 577             self.logger.info(self.vapi.ppcli("show interface"))
 578             self.logger.info(self.vapi.ppcli("show hardware"))
 579             self.logger.info(self.statistics.set_errors_str())
 580             self.logger.info(self.vapi.ppcli("show run"))
 581             self.logger.info(self.vapi.ppcli("show log"))
 582             self.registry.remove_vpp_config(self.logger)
 583             # Save/Dump VPP api trace log
 584             api_trace = "vpp_api_trace.%s.log" % self._testMethodName
 585             tmp_api_trace = "/tmp/%s" % api_trace
 586             vpp_api_trace_log = "%s/%s" % (self.tempdir, api_trace)
 587             self.logger.info(self.vapi.ppcli("api trace save %s" % api_trace))
 588             self.logger.info("Moving %s to %s\n" % (tmp_api_trace,
 589                                                     vpp_api_trace_log))
 590             os.rename(tmp_api_trace, vpp_api_trace_log)
 591             self.logger.info(self.vapi.ppcli("api trace custom-dump %s" %
 592                                              vpp_api_trace_log))
 593         else:
 594             self.registry.unregister_all(self.logger)
 595
 596     def setUp(self):
 597         """ Clear trace before running each test"""
 598         super(VppTestCase, self).setUp()
 599         self.reporter.send_keep_alive(self)
 600         self.logger.debug("--- setUp() for %s.%s(%s) called ---" %
 601                           (self.__class__.__name__, self._testMethodName,
 602                            self._testMethodDoc))
 603         if self.vpp_dead:
 604             raise Exception("VPP is dead when setting up the test")
 605         self.sleep(.1, "during setUp")
 606         self.vpp_stdout_deque.append(
 607             "--- test setUp() for %s.%s(%s) starts here ---\n" %
 608             (self.__class__.__name__, self._testMethodName,
 609              self._testMethodDoc))
 610         self.vpp_stderr_deque.append(
 611             "--- test setUp() for %s.%s(%s) starts here ---\n" %
 612             (self.__class__.__name__, self._testMethodName,
 613              self._testMethodDoc))
 614         self.vapi.cli("clear trace")
 615         # store the test instance inside the test class - so that objects
 616         # holding the class can access instance methods (like assertEqual)
 617         type(self).test_instance = self
 618
 619     @classmethod
 620     def pg_enable_capture(cls, interfaces=None):
 621         """
 622         Enable capture on packet-generator interfaces
 623
 624         :param interfaces: iterable interface indexes (if None,
 625                            use self.pg_interfaces)
 626
 627         """
 628         if interfaces is None:
 629             interfaces = cls.pg_interfaces
 630         for i in interfaces:
 631             i.enable_capture()
 632
 633     @classmethod
 634     def register_capture(cls, cap_name):
 635         """ Register a capture in the testclass """
 636         # add to the list of captures with current timestamp
 637         cls._captures.append((time.time(), cap_name))
 638         # filter out from zombies
 639         cls._zombie_captures = [(stamp, name)
 640                                 for (stamp, name) in cls._zombie_captures
 641                                 if name != cap_name]
 642
 643     @classmethod
 644     def pg_start(cls):
 645         """ Remove any zombie captures and enable the packet generator """
 646         # how long before capture is allowed to be deleted - otherwise vpp
 647         # crashes - 100ms seems enough (this shouldn't be needed at all)
 648         capture_ttl = 0.1
 649         now = time.time()
 650         for stamp, cap_name in cls._zombie_captures:
 651             wait = stamp + capture_ttl - now
 652             if wait > 0:
 653                 cls.sleep(wait, "before deleting capture %s" % cap_name)
 654                 now = time.time()
 655             cls.logger.debug("Removing zombie capture %s" % cap_name)
 656             cls.vapi.cli('packet-generator delete %s' % cap_name)
 657
 658         cls.vapi.cli("trace add pg-input 1000")
 659         cls.vapi.cli('packet-generator enable')
 660         cls._zombie_captures = cls._captures
 661         cls._captures = []
 662
 663     @classmethod
 664     def create_pg_interfaces(cls, interfaces):
 665         """
 666         Create packet-generator interfaces.
 667
 668         :param interfaces: iterable indexes of the interfaces.
 669         :returns: List of created interfaces.
 670
 671         """
 672         result = []
 673         for i in interfaces:
 674             intf = VppPGInterface(cls, i)
 675             setattr(cls, intf.name, intf)
 676             result.append(intf)
 677         cls.pg_interfaces = result
 678         return result
 679
 680     @classmethod
 681     def create_loopback_interfaces(cls, count):
 682         """
 683         Create loopback interfaces.
 684
 685         :param count: number of interfaces created.
 686         :returns: List of created interfaces.
 687         """
 688         result = [VppLoInterface(cls) for i in range(count)]
 689         for intf in result:
 690             setattr(cls, intf.name, intf)
 691         cls.lo_interfaces = result
 692         return result
 693
 694     @classmethod
 695     def create_bvi_interfaces(cls, count):
 696         """
 697         Create BVI interfaces.
 698
 699         :param count: number of interfaces created.
 700         :returns: List of created interfaces.
 701         """
 702         result = [VppBviInterface(cls) for i in range(count)]
 703         for intf in result:
 704             setattr(cls, intf.name, intf)
 705         cls.bvi_interfaces = result
 706         return result
 707
 708     @staticmethod
 709     def extend_packet(packet, size, padding=' '):
 710         """
 711         Extend packet to given size by padding with spaces or custom padding
 712         NOTE: Currently works only when Raw layer is present.
 713
 714         :param packet: packet
 715         :param size: target size
 716         :param padding: padding used to extend the payload
 717
 718         """
 719         packet_len = len(packet) + 4
 720         extend = size - packet_len
 721         if extend > 0:
 722             num = (extend / len(padding)) + 1
 723             packet[Raw].load += (padding * num)[:extend]
 724
 725     @classmethod
 726     def reset_packet_infos(cls):
 727         """ Reset the list of packet info objects and packet counts to zero """
 728         cls._packet_infos = {}
 729         cls._packet_count_for_dst_if_idx = {}
 730
 731     @classmethod
 732     def create_packet_info(cls, src_if, dst_if):
 733         """
 734         Create packet info object containing the source and destination indexes
 735         and add it to the testcase's packet info list
 736
 737         :param VppInterface src_if: source interface
 738         :param VppInterface dst_if: destination interface
 739
 740         :returns: _PacketInfo object
 741
 742         """
 743         info = _PacketInfo()
 744         info.index = len(cls._packet_infos)
 745         info.src = src_if.sw_if_index
 746         info.dst = dst_if.sw_if_index
 747         if isinstance(dst_if, VppSubInterface):
 748             dst_idx = dst_if.parent.sw_if_index
 749         else:
 750             dst_idx = dst_if.sw_if_index
 751         if dst_idx in cls._packet_count_for_dst_if_idx:
 752             cls._packet_count_for_dst_if_idx[dst_idx] += 1
 753         else:
 754             cls._packet_count_for_dst_if_idx[dst_idx] = 1
 755         cls._packet_infos[info.index] = info
 756         return info
 757
 758     @staticmethod
 759     def info_to_payload(info):
 760         """
 761         Convert _PacketInfo object to packet payload
 762
 763         :param info: _PacketInfo object
 764
 765         :returns: string containing serialized data from packet info
 766         """
 767         return "%d %d %d %d %d" % (info.index, info.src, info.dst,
 768                                    info.ip, info.proto)
 769
 770     @staticmethod
 771     def payload_to_info(payload, payload_field='load'):
 772         """
 773         Convert packet payload to _PacketInfo object
 774
 775         :param payload: packet payload
 776         :type payload:  <class 'scapy.packet.Raw'>
 777         :param payload_field: packet fieldname of payload "load" for
 778                 <class 'scapy.packet.Raw'>
 779         :type payload_field: str
 780         :returns: _PacketInfo object containing de-serialized data from payload
 781
 782         """
 783         numbers = getattr(payload, payload_field).split()
 784         info = _PacketInfo()
 785         info.index = int(numbers[0])
 786         info.src = int(numbers[1])
 787         info.dst = int(numbers[2])
 788         info.ip = int(numbers[3])
 789         info.proto = int(numbers[4])
 790         return info
 791
 792     def get_next_packet_info(self, info):
 793         """
 794         Iterate over the packet info list stored in the testcase
 795         Start iteration with first element if info is None
 796         Continue based on index in info if info is specified
 797
 798         :param info: info or None
 799         :returns: next info in list or None if no more infos
 800         """
 801         if info is None:
 802             next_index = 0
 803         else:
 804             next_index = info.index + 1
 805         if next_index == len(self._packet_infos):
 806             return None
 807         else:
 808             return self._packet_infos[next_index]
 809
 810     def get_next_packet_info_for_interface(self, src_index, info):
 811         """
 812         Search the packet info list for the next packet info with same source
 813         interface index
 814
 815         :param src_index: source interface index to search for
 816         :param info: packet info - where to start the search
 817         :returns: packet info or None
 818
 819         """
 820         while True:
 821             info = self.get_next_packet_info(info)
 822             if info is None:
 823                 return None
 824             if info.src == src_index:
 825                 return info
 826
 827     def get_next_packet_info_for_interface2(self, src_index, dst_index, info):
 828         """
 829         Search the packet info list for the next packet info with same source
 830         and destination interface indexes
 831
 832         :param src_index: source interface index to search for
 833         :param dst_index: destination interface index to search for
 834         :param info: packet info - where to start the search
 835         :returns: packet info or None
 836
 837         """
 838         while True:
 839             info = self.get_next_packet_info_for_interface(src_index, info)
 840             if info is None:
 841                 return None
 842             if info.dst == dst_index:
 843                 return info
 844
 845     def assert_equal(self, real_value, expected_value, name_or_class=None):
 846         if name_or_class is None:
 847             self.assertEqual(real_value, expected_value)
 848             return
 849         try:
 850             msg = "Invalid %s: %d('%s') does not match expected value %d('%s')"
 851             msg = msg % (getdoc(name_or_class).strip(),
 852                          real_value, str(name_or_class(real_value)),
 853                          expected_value, str(name_or_class(expected_value)))
 854         except Exception:
 855             msg = "Invalid %s: %s does not match expected value %s" % (
 856                 name_or_class, real_value, expected_value)
 857
 858         self.assertEqual(real_value, expected_value, msg)
 859
 860     def assert_in_range(self,
 861                         real_value,
 862                         expected_min,
 863                         expected_max,
 864                         name=None):
 865         if name is None:
 866             msg = None
 867         else:
 868             msg = "Invalid %s: %s out of range <%s,%s>" % (
 869                 name, real_value, expected_min, expected_max)
 870         self.assertTrue(expected_min <= real_value <= expected_max, msg)
 871
 872     def assert_packet_checksums_valid(self, packet,
 873                                       ignore_zero_udp_checksums=True):
 874         received = packet.__class__(scapy.compat.raw(packet))
 875         self.logger.debug(
 876             ppp("Verifying packet checksums for packet:", received))
 877         udp_layers = ['UDP', 'UDPerror']
 878         checksum_fields = ['cksum', 'chksum']
 879         checksums = []
 880         counter = 0
 881         temp = received.__class__(scapy.compat.raw(received))
 882         while True:
 883             layer = temp.getlayer(counter)
 884             if layer:
 885                 for cf in checksum_fields:
 886                     if hasattr(layer, cf):
 887                         if ignore_zero_udp_checksums and \
 888                                         0 == getattr(layer, cf) and \
 889                                         layer.name in udp_layers:
 890                             continue
 891                         delattr(layer, cf)
 892                         checksums.append((counter, cf))
 893             else:
 894                 break
 895             counter = counter + 1
 896         if 0 == len(checksums):
 897             return
 898         temp = temp.__class__(scapy.compat.raw(temp))
 899         for layer, cf in checksums:
 900             calc_sum = getattr(temp[layer], cf)
 901             self.assert_equal(
 902                 getattr(received[layer], cf), calc_sum,
 903                 "packet checksum on layer #%d: %s" % (layer, temp[layer].name))
 904             self.logger.debug(
 905                 "Checksum field `%s` on `%s` layer has correct value `%s`" %
 906                 (cf, temp[layer].name, calc_sum))
 907
 908     def assert_checksum_valid(self, received_packet, layer,
 909                               field_name='chksum',
 910                               ignore_zero_checksum=False):
 911         """ Check checksum of received packet on given layer """
 912         received_packet_checksum = getattr(received_packet[layer], field_name)
 913         if ignore_zero_checksum and 0 == received_packet_checksum:
 914             return
 915         recalculated = received_packet.__class__(
 916             scapy.compat.raw(received_packet))
 917         delattr(recalculated[layer], field_name)
 918         recalculated = recalculated.__class__(scapy.compat.raw(recalculated))
 919         self.assert_equal(received_packet_checksum,
 920                           getattr(recalculated[layer], field_name),
 921                           "packet checksum on layer: %s" % layer)
 922
 923     def assert_ip_checksum_valid(self, received_packet,
 924                                  ignore_zero_checksum=False):
 925         self.assert_checksum_valid(received_packet, 'IP',
 926                                    ignore_zero_checksum=ignore_zero_checksum)
 927
 928     def assert_tcp_checksum_valid(self, received_packet,
 929                                   ignore_zero_checksum=False):
 930         self.assert_checksum_valid(received_packet, 'TCP',
 931                                    ignore_zero_checksum=ignore_zero_checksum)
 932
 933     def assert_udp_checksum_valid(self, received_packet,
 934                                   ignore_zero_checksum=True):
 935         self.assert_checksum_valid(received_packet, 'UDP',
 936                                    ignore_zero_checksum=ignore_zero_checksum)
 937
 938     def assert_embedded_icmp_checksum_valid(self, received_packet):
 939         if received_packet.haslayer(IPerror):
 940             self.assert_checksum_valid(received_packet, 'IPerror')
 941         if received_packet.haslayer(TCPerror):
 942             self.assert_checksum_valid(received_packet, 'TCPerror')
 943         if received_packet.haslayer(UDPerror):
 944             self.assert_checksum_valid(received_packet, 'UDPerror',
 945                                        ignore_zero_checksum=True)
 946         if received_packet.haslayer(ICMPerror):
 947             self.assert_checksum_valid(received_packet, 'ICMPerror')
 948
 949     def assert_icmp_checksum_valid(self, received_packet):
 950         self.assert_checksum_valid(received_packet, 'ICMP')
 951         self.assert_embedded_icmp_checksum_valid(received_packet)
 952
 953     def assert_icmpv6_checksum_valid(self, pkt):
 954         if pkt.haslayer(ICMPv6DestUnreach):
 955             self.assert_checksum_valid(pkt, 'ICMPv6DestUnreach', 'cksum')
 956             self.assert_embedded_icmp_checksum_valid(pkt)
 957         if pkt.haslayer(ICMPv6EchoRequest):
 958             self.assert_checksum_valid(pkt, 'ICMPv6EchoRequest', 'cksum')
 959         if pkt.haslayer(ICMPv6EchoReply):
 960             self.assert_checksum_valid(pkt, 'ICMPv6EchoReply', 'cksum')
 961
 962     def assert_packet_counter_equal(self, counter, expected_value):
 963         if counter.startswith("/"):
 964             counter_value = self.statistics.get_counter(counter)
 965             self.assert_equal(counter_value, expected_value,
 966                               "packet counter `%s'" % counter)
 967         else:
 968             counters = self.vapi.cli("sh errors").split('\n')
 969             counter_value = -1
 970             for i in range(1, len(counters) - 1):
 971                 results = counters[i].split()
 972                 if results[1] == counter:
 973                     counter_value = int(results[0])
 974                     break
 975
 976     @classmethod
 977     def sleep(cls, timeout, remark=None):
 978
 979         # /* Allow sleep(0) to maintain win32 semantics, and as decreed
 980         #  * by Guido, only the main thread can be interrupted.
 981         # */
 982         # https://github.com/python/cpython/blob/6673decfa0fb078f60587f5cb5e98460eea137c2/Modules/timemodule.c#L1892  # noqa
 983         if timeout == 0:
 984             # yield quantum
 985             if hasattr(os, 'sched_yield'):
 986                 os.sched_yield()
 987             else:
 988                 time.sleep(0)
 989             return
 990
 991         if hasattr(cls, 'logger'):
 992             cls.logger.debug("Starting sleep for %es (%s)", timeout, remark)
 993         before = time.time()
 994         time.sleep(timeout)
 995         after = time.time()
 996         if hasattr(cls, 'logger') and after - before > 2 * timeout:
 997             cls.logger.error("unexpected self.sleep() result - "
 998                              "slept for %es instead of ~%es!",
 999                              after - before, timeout)
1000         if hasattr(cls, 'logger'):
1001             cls.logger.debug(
1002                 "Finished sleep (%s) - slept %es (wanted %es)",
1003                 remark, after - before, timeout)
1004
1005     def pg_send(self, intf, pkts):
1006         self.vapi.cli("clear trace")
1007         intf.add_stream(pkts)
1008         self.pg_enable_capture(self.pg_interfaces)
1009         self.pg_start()
1010
1011     def send_and_assert_no_replies(self, intf, pkts, remark="", timeout=None):
1012         self.pg_send(intf, pkts)
1013         if not timeout:
1014             timeout = 1
1015         for i in self.pg_interfaces:
1016             i.get_capture(0, timeout=timeout)
1017             i.assert_nothing_captured(remark=remark)
1018             timeout = 0.1
1019
1020     def send_and_expect(self, intf, pkts, output):
1021         self.pg_send(intf, pkts)
1022         rx = output.get_capture(len(pkts))
1023         return rx
1024
1025     def send_and_expect_only(self, intf, pkts, output, timeout=None):
1026         self.pg_send(intf, pkts)
1027         rx = output.get_capture(len(pkts))
1028         outputs = [output]
1029         if not timeout:
1030             timeout = 1
1031         for i in self.pg_interfaces:
1032             if i not in outputs:
1033                 i.get_capture(0, timeout=timeout)
1034                 i.assert_nothing_captured()
1035                 timeout = 0.1
1036
1037         return rx
1038
1039     def runTest(self):
1040         """ unittest calls runTest when TestCase is instantiated without a
1041         test case.  Use case: Writing unittests against VppTestCase"""
1042         pass
1043
1044
1045 def get_testcase_doc_name(test):
1046     return getdoc(test.__class__).splitlines()[0]
1047
1048
1049 def get_test_description(descriptions, test):
1050     short_description = test.shortDescription()
1051     if descriptions and short_description:
1052         return short_description
1053     else:
1054         return str(test)
1055
1056
1057 class TestCaseInfo(object):
1058     def __init__(self, logger, tempdir, vpp_pid, vpp_bin_path):
1059         self.logger = logger
1060         self.tempdir = tempdir
1061         self.vpp_pid = vpp_pid
1062         self.vpp_bin_path = vpp_bin_path
1063         self.core_crash_test = None
1064
1065
1066 class VppTestResult(unittest.TestResult):
1067     """
1068     @property result_string
1069      String variable to store the test case result string.
1070     @property errors
1071      List variable containing 2-tuples of TestCase instances and strings
1072      holding formatted tracebacks. Each tuple represents a test which
1073      raised an unexpected exception.
1074     @property failures
1075      List variable containing 2-tuples of TestCase instances and strings
1076      holding formatted tracebacks. Each tuple represents a test where
1077      a failure was explicitly signalled using the TestCase.assert*()
1078      methods.
1079     """
1080
1081     failed_test_cases_info = set()
1082     core_crash_test_cases_info = set()
1083     current_test_case_info = None
1084
1085     def __init__(self, stream=None, descriptions=None, verbosity=None,
1086                  runner=None):
1087         """
1088         :param stream File descriptor to store where to report test results.
1089             Set to the standard error stream by default.
1090         :param descriptions Boolean variable to store information if to use
1091             test case descriptions.
1092         :param verbosity Integer variable to store required verbosity level.
1093         """
1094         super(VppTestResult, self).__init__(stream, descriptions, verbosity)
1095         self.stream = stream
1096         self.descriptions = descriptions
1097         self.verbosity = verbosity
1098         self.result_string = None
1099         self.runner = runner
1100
1101     def addSuccess(self, test):
1102         """
1103         Record a test succeeded result
1104
1105         :param test:
1106
1107         """
1108         if self.current_test_case_info:
1109             self.current_test_case_info.logger.debug(
1110                 "--- addSuccess() %s.%s(%s) called" % (test.__class__.__name__,
1111                                                        test._testMethodName,
1112                                                        test._testMethodDoc))
1113         unittest.TestResult.addSuccess(self, test)
1114         self.result_string = colorize("OK", GREEN)
1115
1116         self.send_result_through_pipe(test, PASS)
1117
1118     def addSkip(self, test, reason):
1119         """
1120         Record a test skipped.
1121
1122         :param test:
1123         :param reason:
1124
1125         """
1126         if self.current_test_case_info:
1127             self.current_test_case_info.logger.debug(
1128                 "--- addSkip() %s.%s(%s) called, reason is %s" %
1129                 (test.__class__.__name__, test._testMethodName,
1130                  test._testMethodDoc, reason))
1131         unittest.TestResult.addSkip(self, test, reason)
1132         self.result_string = colorize("SKIP", YELLOW)
1133
1134         self.send_result_through_pipe(test, SKIP)
1135
1136     def symlink_failed(self):
1137         if self.current_test_case_info:
1138             try:
1139                 failed_dir = os.getenv('FAILED_DIR')
1140                 link_path = os.path.join(
1141                     failed_dir,
1142                     '%s-FAILED' %
1143                     os.path.basename(self.current_test_case_info.tempdir))
1144                 if self.current_test_case_info.logger:
1145                     self.current_test_case_info.logger.debug(
1146                         "creating a link to the failed test")
1147                     self.current_test_case_info.logger.debug(
1148                         "os.symlink(%s, %s)" %
1149                         (self.current_test_case_info.tempdir, link_path))
1150                 if os.path.exists(link_path):
1151                     if self.current_test_case_info.logger:
1152                         self.current_test_case_info.logger.debug(
1153                             'symlink already exists')
1154                 else:
1155                     os.symlink(self.current_test_case_info.tempdir, link_path)
1156
1157             except Exception as e:
1158                 if self.current_test_case_info.logger:
1159                     self.current_test_case_info.logger.error(e)
1160
1161     def send_result_through_pipe(self, test, result):
1162         if hasattr(self, 'test_framework_result_pipe'):
1163             pipe = self.test_framework_result_pipe
1164             if pipe:
1165                 pipe.send((test.id(), result))
1166
1167     def log_error(self, test, err, fn_name):
1168         if self.current_test_case_info:
1169             if isinstance(test, unittest.suite._ErrorHolder):
1170                 test_name = test.description
1171             else:
1172                 test_name = '%s.%s(%s)' % (test.__class__.__name__,
1173                                            test._testMethodName,
1174                                            test._testMethodDoc)
1175             self.current_test_case_info.logger.debug(
1176                 "--- %s() %s called, err is %s" %
1177                 (fn_name, test_name, err))
1178             self.current_test_case_info.logger.debug(
1179                 "formatted exception is:\n%s" %
1180                 "".join(format_exception(*err)))
1181
1182     def add_error(self, test, err, unittest_fn, error_type):
1183         if error_type == FAIL:
1184             self.log_error(test, err, 'addFailure')
1185             error_type_str = colorize("FAIL", RED)
1186         elif error_type == ERROR:
1187             self.log_error(test, err, 'addError')
1188             error_type_str = colorize("ERROR", RED)
1189         else:
1190             raise Exception('Error type %s cannot be used to record an '
1191                             'error or a failure' % error_type)
1192
1193         unittest_fn(self, test, err)
1194         if self.current_test_case_info:
1195             self.result_string = "%s [ temp dir used by test case: %s ]" % \
1196                                  (error_type_str,
1197                                   self.current_test_case_info.tempdir)
1198             self.symlink_failed()
1199             self.failed_test_cases_info.add(self.current_test_case_info)
1200             if is_core_present(self.current_test_case_info.tempdir):
1201                 if not self.current_test_case_info.core_crash_test:
1202                     if isinstance(test, unittest.suite._ErrorHolder):
1203                         test_name = str(test)
1204                     else:
1205                         test_name = "'{!s}' ({!s})".format(
1206                             get_testcase_doc_name(test), test.id())
1207                     self.current_test_case_info.core_crash_test = test_name
1208                 self.core_crash_test_cases_info.add(
1209                     self.current_test_case_info)
1210         else:
1211             self.result_string = '%s [no temp dir]' % error_type_str
1212
1213         self.send_result_through_pipe(test, error_type)
1214
1215     def addFailure(self, test, err):
1216         """
1217         Record a test failed result
1218
1219         :param test:
1220         :param err: error message
1221
1222         """
1223         self.add_error(test, err, unittest.TestResult.addFailure, FAIL)
1224
1225     def addError(self, test, err):
1226         """
1227         Record a test error result
1228
1229         :param test:
1230         :param err: error message
1231
1232         """
1233         self.add_error(test, err, unittest.TestResult.addError, ERROR)
1234
1235     def getDescription(self, test):
1236         """
1237         Get test description
1238
1239         :param test:
1240         :returns: test description
1241
1242         """
1243         return get_test_description(self.descriptions, test)
1244
1245     def startTest(self, test):
1246         """
1247         Start a test
1248
1249         :param test:
1250
1251         """
1252
1253         def print_header(test):
1254             if not hasattr(test.__class__, '_header_printed'):
1255                 print(double_line_delim)
1256                 print(colorize(getdoc(test).splitlines()[0], GREEN))
1257                 print(double_line_delim)
1258             test.__class__._header_printed = True
1259
1260         print_header(test)
1261
1262         unittest.TestResult.startTest(self, test)
1263         if self.verbosity > 0:
1264             self.stream.writeln(
1265                 "Starting " + self.getDescription(test) + " ...")
1266             self.stream.writeln(single_line_delim)
1267
1268     def stopTest(self, test):
1269         """
1270         Called when the given test has been run
1271
1272         :param test:
1273
1274         """
1275         unittest.TestResult.stopTest(self, test)
1276         if self.verbosity > 0:
1277             self.stream.writeln(single_line_delim)
1278             self.stream.writeln("%-73s%s" % (self.getDescription(test),
1279                                              self.result_string))
1280             self.stream.writeln(single_line_delim)
1281         else:
1282             self.stream.writeln("%-73s%s" % (self.getDescription(test),
1283                                              self.result_string))
1284
1285         self.send_result_through_pipe(test, TEST_RUN)
1286
1287     def printErrors(self):
1288         """
1289         Print errors from running the test case
1290         """
1291         if len(self.errors) > 0 or len(self.failures) > 0:
1292             self.stream.writeln()
1293             self.printErrorList('ERROR', self.errors)
1294             self.printErrorList('FAIL', self.failures)
1295
1296         # ^^ that is the last output from unittest before summary
1297         if not self.runner.print_summary:
1298             devnull = unittest.runner._WritelnDecorator(open(os.devnull, 'w'))
1299             self.stream = devnull
1300             self.runner.stream = devnull
1301
1302     def printErrorList(self, flavour, errors):
1303         """
1304         Print error list to the output stream together with error type
1305         and test case description.
1306
1307         :param flavour: error type
1308         :param errors: iterable errors
1309
1310         """
1311         for test, err in errors:
1312             self.stream.writeln(double_line_delim)
1313             self.stream.writeln("%s: %s" %
1314                                 (flavour, self.getDescription(test)))
1315             self.stream.writeln(single_line_delim)
1316             self.stream.writeln("%s" % err)
1317
1318
1319 class VppTestRunner(unittest.TextTestRunner):
1320     """
1321     A basic test runner implementation which prints results to standard error.
1322     """
1323
1324     @property
1325     def resultclass(self):
1326         """Class maintaining the results of the tests"""
1327         return VppTestResult
1328
1329     def __init__(self, keep_alive_pipe=None, descriptions=True, verbosity=1,
1330                  result_pipe=None, failfast=False, buffer=False,
1331                  resultclass=None, print_summary=True, **kwargs):
1332         # ignore stream setting here, use hard-coded stdout to be in sync
1333         # with prints from VppTestCase methods ...
1334         super(VppTestRunner, self).__init__(sys.stdout, descriptions,
1335                                             verbosity, failfast, buffer,
1336                                             resultclass, **kwargs)
1337         KeepAliveReporter.pipe = keep_alive_pipe
1338
1339         self.orig_stream = self.stream
1340         self.resultclass.test_framework_result_pipe = result_pipe
1341
1342         self.print_summary = print_summary
1343
1344     def _makeResult(self):
1345         return self.resultclass(self.stream,
1346                                 self.descriptions,
1347                                 self.verbosity,
1348                                 self)
1349
1350     def run(self, test):
1351         """
1352         Run the tests
1353
1354         :param test:
1355
1356         """
1357         faulthandler.enable()  # emit stack trace to stderr if killed by signal
1358
1359         result = super(VppTestRunner, self).run(test)
1360         if not self.print_summary:
1361             self.stream = self.orig_stream
1362             result.stream = self.orig_stream
1363         return result
1364
1365
1366 class Worker(Thread):
1367     def __init__(self, args, logger, env={}):
1368         self.logger = logger
1369         self.args = args
1370         self.result = None
1371         self.env = copy.deepcopy(env)
1372         super(Worker, self).__init__()
1373
1374     def run(self):
1375         executable = self.args[0]
1376         self.logger.debug("Running executable w/args `%s'" % self.args)
1377         env = os.environ.copy()
1378         env.update(self.env)
1379         env["CK_LOG_FILE_NAME"] = "-"
1380         self.process = subprocess.Popen(
1381             self.args, shell=False, env=env, preexec_fn=os.setpgrp,
1382             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
1383         out, err = self.process.communicate()
1384         self.logger.debug("Finished running `%s'" % executable)
1385         self.logger.info("Return code is `%s'" % self.process.returncode)
1386         self.logger.info(single_line_delim)
1387         self.logger.info("Executable `%s' wrote to stdout:" % executable)
1388         self.logger.info(single_line_delim)
1389         self.logger.info(out)
1390         self.logger.info(single_line_delim)
1391         self.logger.info("Executable `%s' wrote to stderr:" % executable)
1392         self.logger.info(single_line_delim)
1393         self.logger.info(err)
1394         self.logger.info(single_line_delim)
1395         self.result = self.process.returncode
1396
1397 if __name__ == '__main__':
1398     pass