run_tests.py

#!/usr/bin/env python2.7
# Copyright 2015, Google Inc.
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
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#     * Redistributions in binary form must reproduce the above
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# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Run tests in parallel."""

from __future__ import print_function

import argparse
import ast
import collections
import glob
import itertools
import json
import multiprocessing
import os
import os.path
import pipes
import platform
import random
import re
import socket
import subprocess
import sys
import tempfile
import traceback
import time
from six.moves import urllib
import uuid

import jobset
import report_utils
import watch_dirs


_ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
os.chdir(_ROOT)


_FORCE_ENVIRON_FOR_WRAPPERS = {
  'GRPC_VERBOSITY': 'DEBUG',
}


_POLLING_STRATEGIES = {
  'linux': ['epoll', 'poll', 'poll-cv']
}


def platform_string():
  return jobset.platform_string()


_DEFAULT_TIMEOUT_SECONDS = 5 * 60


# SimpleConfig: just compile with CONFIG=config, and run the binary to test
class Config(object):

  def __init__(self, config, environ=None, timeout_multiplier=1, tool_prefix=[], iomgr_platform='native'):
    if environ is None:
      environ = {}
    self.build_config = config
    self.environ = environ
    self.environ['CONFIG'] = config
    self.tool_prefix = tool_prefix
    self.timeout_multiplier = timeout_multiplier
    self.iomgr_platform = iomgr_platform

  def job_spec(self, cmdline, timeout_seconds=_DEFAULT_TIMEOUT_SECONDS,
               shortname=None, environ={}, cpu_cost=1.0, flaky=False):
    """Construct a jobset.JobSpec for a test under this config

       Args:
         cmdline:      a list of strings specifying the command line the test
                       would like to run
    """
    actual_environ = self.environ.copy()
    for k, v in environ.items():
      actual_environ[k] = v
    return jobset.JobSpec(cmdline=self.tool_prefix + cmdline,
                          shortname=shortname,
                          environ=actual_environ,
                          cpu_cost=cpu_cost,
                          timeout_seconds=(self.timeout_multiplier * timeout_seconds if timeout_seconds else None),
                          flake_retries=5 if flaky or args.allow_flakes else 0,
                          timeout_retries=3 if args.allow_flakes else 0)


def get_c_tests(travis, test_lang) :
  out = []
  platforms_str = 'ci_platforms' if travis else 'platforms'
  with open('tools/run_tests/tests.json') as f:
    js = json.load(f)
    return [tgt
            for tgt in js
            if tgt['language'] == test_lang and
                platform_string() in tgt[platforms_str] and
                not (travis and tgt['flaky'])]


def _check_compiler(compiler, supported_compilers):
  if compiler not in supported_compilers:
    raise Exception('Compiler %s not supported (on this platform).' % compiler)


def _check_arch(arch, supported_archs):
  if arch not in supported_archs:
    raise Exception('Architecture %s not supported.' % arch)


def _is_use_docker_child():
  """Returns True if running running as a --use_docker child."""
  return True if os.getenv('RUN_TESTS_COMMAND') else False


_PythonConfigVars = collections.namedtuple(
  '_ConfigVars', ['shell', 'builder', 'builder_prefix_arguments',
                  'venv_relative_python', 'toolchain', 'runner'])


def _python_config_generator(name, major, minor, bits, config_vars):
  return PythonConfig(
    name,
    config_vars.shell + config_vars.builder + config_vars.builder_prefix_arguments + [
      _python_pattern_function(major=major, minor=minor, bits=bits)] + [
      name] + config_vars.venv_relative_python + config_vars.toolchain,
    config_vars.shell + config_vars.runner + [
      os.path.join(name, config_vars.venv_relative_python[0])])


def _pypy_config_generator(name, major, config_vars):
  return PythonConfig(
    name,
    config_vars.shell + config_vars.builder + config_vars.builder_prefix_arguments + [
      _pypy_pattern_function(major=major)] + [
      name] + config_vars.venv_relative_python + config_vars.toolchain,
    config_vars.shell + config_vars.runner + [
      os.path.join(name, config_vars.venv_relative_python[0])])


def _python_pattern_function(major, minor, bits):
  # Bit-ness is handled by the test machine's environment
  if os.name == "nt":
    if bits == "64":
      return '/c/Python{major}{minor}/python.exe'.format(
        major=major, minor=minor, bits=bits)
    else:
      return '/c/Python{major}{minor}_{bits}bits/python.exe'.format(
        major=major, minor=minor, bits=bits)
  else:
    return 'python{major}.{minor}'.format(major=major, minor=minor)


def _pypy_pattern_function(major):
  if major == '2':
    return 'pypy'
  elif major == '3':
    return 'pypy3'
  else:
    raise ValueError("Unknown PyPy major version")


class CLanguage(object):

  def __init__(self, make_target, test_lang):
    self.make_target = make_target
    self.platform = platform_string()
    self.test_lang = test_lang

  def configure(self, config, args):
    self.config = config
    self.args = args
    if self.platform == 'windows':
      self._make_options = [_windows_toolset_option(self.args.compiler),
                            _windows_arch_option(self.args.arch)]
    else:
      self._docker_distro, self._make_options = self._compiler_options(self.args.use_docker,
                                                                       self.args.compiler)
    if args.iomgr_platform == "uv":
      cflags = '-DGRPC_UV '
      try:
        cflags += subprocess.check_output(['pkg-config', '--cflags', 'libuv']).strip() + ' '
      except (subprocess.CalledProcessError, OSError):
        pass
      try:
        ldflags = subprocess.check_output(['pkg-config', '--libs', 'libuv']).strip() + ' '
      except (subprocess.CalledProcessError, OSError):
        ldflags = '-luv '
      self._make_options += ['EXTRA_CPPFLAGS={}'.format(cflags),
                             'EXTRA_LDLIBS={}'.format(ldflags)]

  def test_specs(self):
    out = []
    binaries = get_c_tests(self.args.travis, self.test_lang)
    for target in binaries:
      polling_strategies = (_POLLING_STRATEGIES.get(self.platform, ['all'])
                            if target.get('uses_polling', True)
                            else ['all'])
      if self.args.iomgr_platform == 'uv':
        polling_strategies = ['all']
      for polling_strategy in polling_strategies:
        env={'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
                 _ROOT + '/src/core/lib/tsi/test_creds/ca.pem',
             'GRPC_POLL_STRATEGY': polling_strategy,
             'GRPC_VERBOSITY': 'DEBUG'}
        shortname_ext = '' if polling_strategy=='all' else ' GRPC_POLL_STRATEGY=%s' % polling_strategy
        timeout_scaling = 1
        if polling_strategy == 'poll-cv':
          timeout_scaling *= 5
        if self.config.build_config in target['exclude_configs']:
          continue
        if self.args.iomgr_platform in target.get('exclude_iomgrs', []):
          continue
        if self.platform == 'windows':
          binary = 'vsprojects/%s%s/%s.exe' % (
              'x64/' if self.args.arch == 'x64' else '',
              _MSBUILD_CONFIG[self.config.build_config],
              target['name'])
        else:
          binary = 'bins/%s/%s' % (self.config.build_config, target['name'])
        cpu_cost = target['cpu_cost']
        if cpu_cost == 'capacity':
          cpu_cost = multiprocessing.cpu_count()
        if os.path.isfile(binary):
          if 'gtest' in target and target['gtest']:
            # here we parse the output of --gtest_list_tests to build up a
            # complete list of the tests contained in a binary
            # for each test, we then add a job to run, filtering for just that
            # test
            with open(os.devnull, 'w') as fnull:
              tests = subprocess.check_output([binary, '--gtest_list_tests'],
                                              stderr=fnull)
            base = None
            for line in tests.split('\n'):
              i = line.find('#')
              if i >= 0: line = line[:i]
              if not line: continue
              if line[0] != ' ':
                base = line.strip()
              else:
                assert base is not None
                assert line[1] == ' '
                test = base + line.strip()
                cmdline = [binary] + ['--gtest_filter=%s' % test]
                out.append(self.config.job_spec(cmdline,
                                                shortname='%s --gtest_filter=%s %s' % (binary, test, shortname_ext),
                                                cpu_cost=cpu_cost,
                                                timeout_seconds=_DEFAULT_TIMEOUT_SECONDS * timeout_scaling,
                                                environ=env))
          else:
            cmdline = [binary] + target['args']
            out.append(self.config.job_spec(cmdline,
                                            shortname=' '.join(
                                                          pipes.quote(arg)
                                                          for arg in cmdline) +
                                                      shortname_ext,
                                            cpu_cost=cpu_cost,
                                            flaky=target.get('flaky', False),
                                            timeout_seconds=target.get('timeout_seconds', _DEFAULT_TIMEOUT_SECONDS) * timeout_scaling,
                                            environ=env))
        elif self.args.regex == '.*' or self.platform == 'windows':
          print('\nWARNING: binary not found, skipping', binary)
    return sorted(out)

  def make_targets(self):
    if self.platform == 'windows':
      # don't build tools on windows just yet
      return ['buildtests_%s' % self.make_target]
    return ['buildtests_%s' % self.make_target, 'tools_%s' % self.make_target]

  def make_options(self):
    return self._make_options;

  def pre_build_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\pre_build_c.bat']]
    else:
      return []

  def build_steps(self):
    return []

  def post_tests_steps(self):
    if self.platform == 'windows':
      return []
    else:
      return [['tools/run_tests/post_tests_c.sh']]

  def makefile_name(self):
    return 'Makefile'

  def _clang_make_options(self, version_suffix=''):
    return ['CC=clang%s' % version_suffix,
            'CXX=clang++%s' % version_suffix,
            'LD=clang%s' % version_suffix,
            'LDXX=clang++%s' % version_suffix]

  def _gcc_make_options(self, version_suffix):
    return ['CC=gcc%s' % version_suffix,
            'CXX=g++%s' % version_suffix,
            'LD=gcc%s' % version_suffix,
            'LDXX=g++%s' % version_suffix]

  def _compiler_options(self, use_docker, compiler):
    """Returns docker distro and make options to use for given compiler."""
    if not use_docker and not _is_use_docker_child():
      _check_compiler(compiler, ['default'])

    if compiler == 'gcc4.9' or compiler == 'default':
      return ('jessie', [])
    elif compiler == 'gcc4.4':
      return ('wheezy', self._gcc_make_options(version_suffix='-4.4'))
    elif compiler == 'gcc4.6':
      return ('wheezy', self._gcc_make_options(version_suffix='-4.6'))
    elif compiler == 'gcc4.8':
      return ('jessie', self._gcc_make_options(version_suffix='-4.8'))
    elif compiler == 'gcc5.3':
      return ('ubuntu1604', [])
    elif compiler == 'clang3.4':
      # on ubuntu1404, clang-3.4 alias doesn't exist, just use 'clang'
      return ('ubuntu1404', self._clang_make_options())
    elif compiler == 'clang3.5':
      return ('jessie', self._clang_make_options(version_suffix='-3.5'))
    elif compiler == 'clang3.6':
      return ('ubuntu1604', self._clang_make_options(version_suffix='-3.6'))
    elif compiler == 'clang3.7':
      return ('ubuntu1604', self._clang_make_options(version_suffix='-3.7'))
    else:
      raise Exception('Compiler %s not supported.' % compiler)

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/cxx_%s_%s' % (self._docker_distro,
                                                _docker_arch_suffix(self.args.arch))

  def __str__(self):
    return self.make_target


class NodeLanguage(object):

  def __init__(self):
    self.platform = platform_string()

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default', 'node0.12',
                                         'node4', 'node5', 'node6',
                                         'node7'])
    if self.args.compiler == 'default':
      self.node_version = '4'
    else:
      # Take off the word "node"
      self.node_version = self.args.compiler[4:]

  def test_specs(self):
    if self.platform == 'windows':
      return [self.config.job_spec(['tools\\run_tests\\run_node.bat'])]
    else:
      return [self.config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS)]

  def pre_build_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\pre_build_node.bat']]
    else:
      return [['tools/run_tests/pre_build_node.sh', self.node_version]]

  def make_targets(self):
    return []

  def make_options(self):
    return []

  def build_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\build_node.bat']]
    else:
      return [['tools/run_tests/build_node.sh', self.node_version]]

  def post_tests_steps(self):
    return []

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(self.args.arch)

  def __str__(self):
    return 'node'


class PhpLanguage(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default'])

  def test_specs(self):
    return [self.config.job_spec(['src/php/bin/run_tests.sh'],
                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]

  def pre_build_steps(self):
    return []

  def make_targets(self):
    return ['static_c', 'shared_c']

  def make_options(self):
    return []

  def build_steps(self):
    return [['tools/run_tests/build_php.sh']]

  def post_tests_steps(self):
    return [['tools/run_tests/post_tests_php.sh']]

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/php_jessie_%s' % _docker_arch_suffix(self.args.arch)

  def __str__(self):
    return 'php'


class Php7Language(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default'])

  def test_specs(self):
    return [self.config.job_spec(['src/php/bin/run_tests.sh'],
                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]

  def pre_build_steps(self):
    return []

  def make_targets(self):
    return ['static_c', 'shared_c']

  def make_options(self):
    return []

  def build_steps(self):
    return [['tools/run_tests/build_php.sh']]

  def post_tests_steps(self):
    return [['tools/run_tests/post_tests_php.sh']]

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/php7_jessie_%s' % _docker_arch_suffix(self.args.arch)

  def __str__(self):
    return 'php7'


class PythonConfig(collections.namedtuple('PythonConfig', [
    'name', 'build', 'run'])):
  """Tuple of commands (named s.t. 'what it says on the tin' applies)"""

class PythonLanguage(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    self.pythons = self._get_pythons(self.args)

  def test_specs(self):
    # load list of known test suites
    with open('src/python/grpcio_tests/tests/tests.json') as tests_json_file:
      tests_json = json.load(tests_json_file)
    environment = dict(_FORCE_ENVIRON_FOR_WRAPPERS)
    return [self.config.job_spec(
        config.run,
        timeout_seconds=5*60,
        environ=dict(list(environment.items()) +
                     [('GRPC_PYTHON_TESTRUNNER_FILTER', str(suite_name))]),
        shortname='%s.test.%s' % (config.name, suite_name),)
        for suite_name in tests_json
        for config in self.pythons]

  def pre_build_steps(self):
    return []

  def make_targets(self):
    return []

  def make_options(self):
    return []

  def build_steps(self):
    return [config.build for config in self.pythons]

  def post_tests_steps(self):
    return []

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/python_%s_%s' % (self.python_manager_name(), _docker_arch_suffix(self.args.arch))

  def python_manager_name(self):
    return 'pyenv' if self.args.compiler in ['python3.5', 'python3.6'] else 'jessie'

  def _get_pythons(self, args):
    if args.arch == 'x86':
      bits = '32'
    else:
      bits = '64'

    if os.name == 'nt':
      shell = ['bash']
      builder = [os.path.abspath('tools/run_tests/build_python_msys2.sh')]
      builder_prefix_arguments = ['MINGW{}'.format(bits)]
      venv_relative_python = ['Scripts/python.exe']
      toolchain = ['mingw32']
    else:
      shell = []
      builder = [os.path.abspath('tools/run_tests/build_python.sh')]
      builder_prefix_arguments = []
      venv_relative_python = ['bin/python']
      toolchain = ['unix']

    runner = [os.path.abspath('tools/run_tests/run_python.sh')]
    config_vars = _PythonConfigVars(shell, builder, builder_prefix_arguments,
                              venv_relative_python, toolchain, runner)
    python27_config = _python_config_generator(name='py27', major='2',
                                               minor='7', bits=bits,
                                               config_vars=config_vars)
    python34_config = _python_config_generator(name='py34', major='3',
                                               minor='4', bits=bits,
                                               config_vars=config_vars)
    python35_config = _python_config_generator(name='py35', major='3',
                                               minor='5', bits=bits,
                                               config_vars=config_vars)
    python36_config = _python_config_generator(name='py36', major='3',
                                               minor='6', bits=bits,
                                               config_vars=config_vars)
    pypy27_config = _pypy_config_generator(name='pypy', major='2',
                                           config_vars=config_vars)
    pypy32_config = _pypy_config_generator(name='pypy3', major='3',
                                           config_vars=config_vars)

    if args.compiler == 'default':
      if os.name == 'nt':
        return (python27_config,)
      else:
        return (python27_config, python34_config,)
    elif args.compiler == 'python2.7':
      return (python27_config,)
    elif args.compiler == 'python3.4':
      return (python34_config,)
    elif args.compiler == 'python3.5':
      return (python35_config,)
    elif args.compiler == 'python3.6':
      return (python36_config,)
    elif args.compiler == 'pypy':
      return (pypy27_config,)
    elif args.compiler == 'pypy3':
      return (pypy32_config,)
    else:
      raise Exception('Compiler %s not supported.' % args.compiler)

  def __str__(self):
    return 'python'


class RubyLanguage(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default'])

  def test_specs(self):
    return [self.config.job_spec(['tools/run_tests/run_ruby.sh'],
                                 timeout_seconds=10*60,
                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS)]

  def pre_build_steps(self):
    return [['tools/run_tests/pre_build_ruby.sh']]

  def make_targets(self):
    return []

  def make_options(self):
    return []

  def build_steps(self):
    return [['tools/run_tests/build_ruby.sh']]

  def post_tests_steps(self):
    return [['tools/run_tests/post_tests_ruby.sh']]

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/ruby_jessie_%s' % _docker_arch_suffix(self.args.arch)

  def __str__(self):
    return 'ruby'


class CSharpLanguage(object):

  def __init__(self):
    self.platform = platform_string()

  def configure(self, config, args):
    self.config = config
    self.args = args
    if self.platform == 'windows':
      # Explicitly choosing between x86 and x64 arch doesn't work yet
      _check_arch(self.args.arch, ['default'])
      # CoreCLR use 64bit runtime by default.
      arch_option = 'x64' if self.args.compiler == 'coreclr' else self.args.arch
      self._make_options = [_windows_toolset_option(self.args.compiler),
                            _windows_arch_option(arch_option)]
    else:
      _check_compiler(self.args.compiler, ['default', 'coreclr'])
      if self.platform == 'linux' and self.args.compiler == 'coreclr':
        self._docker_distro = 'coreclr'
      else:
        self._docker_distro = 'jessie'

      if self.platform == 'mac':
        # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
        self._make_options = ['EMBED_OPENSSL=true']
        if self.args.compiler != 'coreclr':
          # On Mac, official distribution of mono is 32bit.
          self._make_options += ['CFLAGS=-m32', 'LDFLAGS=-m32']
      else:
        self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']

  def test_specs(self):
    with open('src/csharp/tests.json') as f:
      tests_by_assembly = json.load(f)

    msbuild_config = _MSBUILD_CONFIG[self.config.build_config]
    nunit_args = ['--labels=All']
    assembly_subdir = 'bin/%s' % msbuild_config
    assembly_extension = '.exe'

    if self.args.compiler == 'coreclr':
      assembly_subdir += '/netcoreapp1.0'
      runtime_cmd = ['dotnet', 'exec']
      assembly_extension = '.dll'
    else:
      nunit_args += ['--noresult', '--workers=1']
      if self.platform == 'windows':
        runtime_cmd = []
      else:
        runtime_cmd = ['mono']

    specs = []
    for assembly in tests_by_assembly.iterkeys():
      assembly_file = 'src/csharp/%s/%s/%s%s' % (assembly,
                                                 assembly_subdir,
                                                 assembly,
                                                 assembly_extension)
      if self.config.build_config != 'gcov' or self.platform != 'windows':
        # normally, run each test as a separate process
        for test in tests_by_assembly[assembly]:
          cmdline = runtime_cmd + [assembly_file, '--test=%s' % test] + nunit_args
          specs.append(self.config.job_spec(cmdline,
                                            shortname='csharp.%s' % test,
                                            environ=_FORCE_ENVIRON_FOR_WRAPPERS))
      else:
        # For C# test coverage, run all tests from the same assembly at once
        # using OpenCover.Console (only works on Windows).
        cmdline = ['src\\csharp\\packages\\OpenCover.4.6.519\\tools\\OpenCover.Console.exe',
                   '-target:%s' % assembly_file,
                   '-targetdir:src\\csharp',
                   '-targetargs:%s' % ' '.join(nunit_args),
                   '-filter:+[Grpc.Core]*',
                   '-register:user',
                   '-output:src\\csharp\\coverage_csharp_%s.xml' % assembly]

        # set really high cpu_cost to make sure instances of OpenCover.Console run exclusively
        # to prevent problems with registering the profiler.
        run_exclusive = 1000000
        specs.append(self.config.job_spec(cmdline,
                                          shortname='csharp.coverage.%s' % assembly,
                                          cpu_cost=run_exclusive,
                                          environ=_FORCE_ENVIRON_FOR_WRAPPERS))
    return specs

  def pre_build_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\pre_build_csharp.bat']]
    else:
      return [['tools/run_tests/pre_build_csharp.sh']]

  def make_targets(self):
    return ['grpc_csharp_ext']

  def make_options(self):
    return self._make_options;

  def build_steps(self):
    if self.args.compiler == 'coreclr':
      if self.platform == 'windows':
        return [['tools\\run_tests\\build_csharp_coreclr.bat']]
      else:
        return [['tools/run_tests/build_csharp_coreclr.sh']]
    else:
      if self.platform == 'windows':
        return [[_windows_build_bat(self.args.compiler),
                 'src/csharp/Grpc.sln',
                 '/p:Configuration=%s' % _MSBUILD_CONFIG[self.config.build_config]]]
      else:
        return [['tools/run_tests/build_csharp.sh']]

  def post_tests_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\post_tests_csharp.bat']]
    else:
      return [['tools/run_tests/post_tests_csharp.sh']]

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/csharp_%s_%s' % (self._docker_distro,
                                                   _docker_arch_suffix(self.args.arch))

  def __str__(self):
    return 'csharp'


class ObjCLanguage(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default'])

  def test_specs(self):
    return [
        self.config.job_spec(['src/objective-c/tests/run_tests.sh'],
                              timeout_seconds=60*60,
                              shortname='objc-tests',
                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
        self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
                              timeout_seconds=30*60,
                              shortname='objc-examples-build',
                              environ=_FORCE_ENVIRON_FOR_WRAPPERS),
    ]

  def pre_build_steps(self):
    return []

  def make_targets(self):
    return ['interop_server']

  def make_options(self):
    return []

  def build_steps(self):
    return [['src/objective-c/tests/build_tests.sh']]

  def post_tests_steps(self):
    return []

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return None

  def __str__(self):
    return 'objc'


class Sanity(object):

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default'])

  def test_specs(self):
    import yaml
    with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
      return [self.config.job_spec(cmd['script'].split(),
                                   timeout_seconds=30*60, environ={'TEST': 'true'},
                                   cpu_cost=cmd.get('cpu_cost', 1))
              for cmd in yaml.load(f)]

  def pre_build_steps(self):
    return []

  def make_targets(self):
    return ['run_dep_checks']

  def make_options(self):
    return []

  def build_steps(self):
    return []

  def post_tests_steps(self):
    return []

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/sanity'

  def __str__(self):
    return 'sanity'

class NodeExpressLanguage(object):
  """Dummy Node express test target to enable running express performance
  benchmarks"""

  def __init__(self):
    self.platform = platform_string()

  def configure(self, config, args):
    self.config = config
    self.args = args
    _check_compiler(self.args.compiler, ['default', 'node0.12',
                                         'node4', 'node5', 'node6'])
    if self.args.compiler == 'default':
      self.node_version = '4'
    else:
      # Take off the word "node"
      self.node_version = self.args.compiler[4:]

  def test_specs(self):
    return []

  def pre_build_steps(self):
    if self.platform == 'windows':
      return [['tools\\run_tests\\pre_build_node.bat']]
    else:
      return [['tools/run_tests/pre_build_node.sh', self.node_version]]

  def make_targets(self):
    return []

  def make_options(self):
    return []

  def build_steps(self):
    return []

  def post_tests_steps(self):
    return []

  def makefile_name(self):
    return 'Makefile'

  def dockerfile_dir(self):
    return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(self.args.arch)

  def __str__(self):
    return 'node_express'

# different configurations we can run under
with open('tools/run_tests/configs.json') as f:
  _CONFIGS = dict((cfg['config'], Config(**cfg)) for cfg in ast.literal_eval(f.read()))


_LANGUAGES = {
    'c++': CLanguage('cxx', 'c++'),
    'c': CLanguage('c', 'c'),
    'node': NodeLanguage(),
    'node_express': NodeExpressLanguage(),
    'php': PhpLanguage(),
    'php7': Php7Language(),
    'python': PythonLanguage(),
    'ruby': RubyLanguage(),
    'csharp': CSharpLanguage(),
    'objc' : ObjCLanguage(),
    'sanity': Sanity()
    }


_MSBUILD_CONFIG = {
    'dbg': 'Debug',
    'opt': 'Release',
    'gcov': 'Debug',
    }


def _windows_arch_option(arch):
  """Returns msbuild cmdline option for selected architecture."""
  if arch == 'default' or arch == 'x86':
    return '/p:Platform=Win32'
  elif arch == 'x64':
    return '/p:Platform=x64'
  else:
    print('Architecture %s not supported.' % arch)
    sys.exit(1)


def _check_arch_option(arch):
  """Checks that architecture option is valid."""
  if platform_string() == 'windows':
    _windows_arch_option(arch)
  elif platform_string() == 'linux':
    # On linux, we need to be running under docker with the right architecture.
    runtime_arch = platform.architecture()[0]
    if arch == 'default':
      return
    elif runtime_arch == '64bit' and arch == 'x64':
      return
    elif runtime_arch == '32bit' and arch == 'x86':
      return
    else:
      print('Architecture %s does not match current runtime architecture.' % arch)
      sys.exit(1)
  else:
    if args.arch != 'default':
      print('Architecture %s not supported on current platform.' % args.arch)
      sys.exit(1)


def _windows_build_bat(compiler):
  """Returns name of build.bat for selected compiler."""
  # For CoreCLR, fall back to the default compiler for C core
  if compiler == 'default' or compiler == 'vs2013' or compiler == 'coreclr':
    return 'vsprojects\\build_vs2013.bat'
  elif compiler == 'vs2015':
    return 'vsprojects\\build_vs2015.bat'
  elif compiler == 'vs2010':
    return 'vsprojects\\build_vs2010.bat'
  else:
    print('Compiler %s not supported.' % compiler)
    sys.exit(1)


def _windows_toolset_option(compiler):
  """Returns msbuild PlatformToolset for selected compiler."""
  # For CoreCLR, fall back to the default compiler for C core
  if compiler == 'default' or compiler == 'vs2013' or compiler == 'coreclr':
    return '/p:PlatformToolset=v120'
  elif compiler == 'vs2015':
    return '/p:PlatformToolset=v140'
  elif compiler == 'vs2010':
    return '/p:PlatformToolset=v100'
  else:
    print('Compiler %s not supported.' % compiler)
    sys.exit(1)


def _docker_arch_suffix(arch):
  """Returns suffix to dockerfile dir to use."""
  if arch == 'default' or arch == 'x64':
    return 'x64'
  elif arch == 'x86':
    return 'x86'
  else:
    print('Architecture %s not supported with current settings.' % arch)
    sys.exit(1)


def runs_per_test_type(arg_str):
    """Auxilary function to parse the "runs_per_test" flag.