v8/test/mjsunit/testcfg.py

# Copyright 2008 the V8 project authors. All rights reserved.
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# modification, are permitted provided that the following conditions are
# met:
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#       with the distribution.
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from collections import OrderedDict
import itertools
import os
import re

from testrunner.local import statusfile
from testrunner.local import testsuite
from testrunner.objects import testcase
from testrunner.outproc import base as outproc

FILES_PATTERN = re.compile(r"//\s+Files:(.*)")
ENV_PATTERN = re.compile(r"//\s+Environment Variables:(.*)")
SELF_SCRIPT_PATTERN = re.compile(r"//\s+Env: TEST_FILE_NAME")
MODULE_PATTERN = re.compile(r"^// MODULE$", flags=re.MULTILINE)
NO_HARNESS_PATTERN = re.compile(r"^// NO HARNESS$", flags=re.MULTILINE)


# Flags known to misbehave when combining arbitrary mjsunit tests. Can also
# be compiled regular expressions.
COMBINE_TESTS_FLAGS_BLACKLIST = [
  '--check-handle-count',
  '--enable-tracing',
  re.compile('--experimental.*'),
  '--expose-trigger-failure',
  re.compile('--harmony.*'),
  '--mock-arraybuffer-allocator',
  '--print-ast',
  re.compile('--trace.*'),
  '--wasm-lazy-compilation',
]


class TestLoader(testsuite.JSTestLoader):
  @property
  def excluded_files(self):
    return {
      "mjsunit.js",
      "mjsunit_suppressions.js",
    }


class TestSuite(testsuite.TestSuite):
  def _test_loader_class(self):
    return TestLoader

  def _test_combiner_class(self):
    return TestCombiner

  def _test_class(self):
    return TestCase


class TestCase(testcase.D8TestCase):
  def __init__(self, *args, **kwargs):
    super(TestCase, self).__init__(*args, **kwargs)

    source = self.get_source()

    files_list = []  # List of file names to append to command arguments.
    files_match = FILES_PATTERN.search(source);
    # Accept several lines of 'Files:'.
    while True:
      if files_match:
        files_list += files_match.group(1).strip().split()
        files_match = FILES_PATTERN.search(source, files_match.end())
      else:
        break
    files = [ os.path.normpath(os.path.join(self.suite.root, '..', '..', f))
              for f in files_list ]
    testfilename = os.path.join(self.suite.root,
                                self.path + self._get_suffix())
    if SELF_SCRIPT_PATTERN.search(source):
      files = (
        ["-e", "TEST_FILE_NAME=\"%s\"" % testfilename.replace("\\", "\\\\")] +
        files)

    if NO_HARNESS_PATTERN.search(source):
      mjsunit_files = []
    else:
      mjsunit_files = [os.path.join(self.suite.root, "mjsunit.js")]

    files_suffix = []
    if MODULE_PATTERN.search(source):
      files_suffix.append("--module")
    files_suffix.append(testfilename)

    self._source_files = files
    self._source_flags = self._parse_source_flags(source)
    self._mjsunit_files = mjsunit_files
    self._files_suffix = files_suffix
    self._env = self._parse_source_env(source)

  def _parse_source_env(self, source):
    env_match = ENV_PATTERN.search(source)
    env = {}
    if env_match:
      for env_pair in env_match.group(1).strip().split():
        var, value = env_pair.split('=')
        env[var] = value
    return env

  def _get_source_flags(self):
    return self._source_flags

  def _get_files_params(self):
    files = list(self._source_files)
    if not self._test_config.no_harness:
      files += self._mjsunit_files
    files += self._files_suffix
    if self._test_config.isolates:
      files += ['--isolate'] + files

    return files

  def _get_cmd_env(self):
    return self._env

  def _get_source_path(self):
    return os.path.join(self.suite.root, self.path + self._get_suffix())


class TestCombiner(testsuite.TestCombiner):
  def get_group_key(self, test):
    """Combine tests with the same set of flags.
    Ignore:
    1. Some special cases where it's not obvious what to pass in the command.
    2. Tests with flags that can cause failure even inside try-catch wrapper.
    3. Tests that use async functions. Async functions can be scheduled after
      exiting from try-catch wrapper and cause failure.
    """
    if (len(test._files_suffix) > 1 or
        test._env or
        not test._mjsunit_files or
        test._source_files):
      return None

    source_flags = test._get_source_flags()
    if ('--expose-trigger-failure' in source_flags or
        '--throws' in source_flags):
      return None

    source_code = test.get_source()
    # Maybe we could just update the tests to await all async functions they
    # call?
    if 'async' in source_code:
      return None

    # TODO(machenbach): Remove grouping if combining tests in a flag-independent
    # way works well.
    return 1

  def _combined_test_class(self):
    return CombinedTest


class CombinedTest(testcase.D8TestCase):
  """Behaves like normal mjsunit tests except:
    1. Expected outcome is always PASS
    2. Instead of one file there is a try-catch wrapper with all combined tests
      passed as arguments.
  """
  def __init__(self, name, tests):
    super(CombinedTest, self).__init__(tests[0].suite, '', name,
                                       tests[0]._test_config)
    self._tests = tests

  def _prepare_outcomes(self, force_update=True):
    self._statusfile_outcomes = outproc.OUTCOMES_PASS_OR_TIMEOUT
    self.expected_outcomes = outproc.OUTCOMES_PASS_OR_TIMEOUT

  def _get_shell_flags(self):
    """In addition to standard set of shell flags it appends:
      --disable-abortjs: %AbortJS can abort the test even inside
        trycatch-wrapper, so we disable it.
      --es-staging: We blacklist all harmony flags due to false positives,
          but always pass the staging flag to cover the mature features.
      --omit-quit: Calling quit() in JS would otherwise early terminate.
      --quiet-load: suppress any stdout from load() function used by
        trycatch-wrapper.
    """
    return [
      '--test',
      '--disable-abortjs',
      '--es-staging',
      '--omit-quit',
      '--quiet-load',
    ]

  def _get_cmd_params(self):
    return (
      super(CombinedTest, self)._get_cmd_params() +
      ['tools/testrunner/trycatch_loader.js', '--'] +
      self._tests[0]._mjsunit_files +
      ['--'] +
      [t._files_suffix[0] for t in self._tests]
    )

  def _merge_flags(self, flags):
    """Merges flags from a list of flags.

    Flag values not starting with '-' are merged with the preceeding flag,
    e.g. --foo 1 will become --foo=1. All other flags remain the same.

    Returns: A generator of flags.
    """
    if not flags:
      return
    # Iterate over flag pairs. ['-'] is a sentinel value for the last iteration.
    for flag1, flag2 in itertools.izip(flags, flags[1:] + ['-']):
      if not flag2.startswith('-'):
        assert '=' not in flag1
        yield flag1 + '=' + flag2
      elif flag1.startswith('-'):
        yield flag1

  def _is_flag_blacklisted(self, flag):
    for item in COMBINE_TESTS_FLAGS_BLACKLIST:
      if isinstance(item, basestring):
        if item == flag:
          return True
      elif item.match(flag):
        return True
    return False

  def _get_combined_flags(self, flags_gen):
    """Combines all flags - dedupes, keeps order and filters some flags.

    Args:
      flags_gen: Generator for flag lists.
    Returns: A list of flags.
    """
    merged_flags = self._merge_flags(list(itertools.chain(*flags_gen)))
    unique_flags = OrderedDict((flag, True) for flag in merged_flags).keys()
    return [
      flag for flag in unique_flags
      if not self._is_flag_blacklisted(flag)
    ]

  def _get_source_flags(self):
    # Combine flags from all source files.
    return self._get_combined_flags(
        test._get_source_flags() for test in self._tests)

  def _get_statusfile_flags(self):
    # Combine flags from all status file entries.
    return self._get_combined_flags(
        test._get_statusfile_flags() for test in self._tests)


def GetSuite(*args, **kwargs):
  return TestSuite(*args, **kwargs)