The Tor Browser: media/webrtc/trunk/testing/gtest/test/gtest_test

media/webrtc/trunk/testing/gtest/test/gtest_test_utils.py@deefc01c0e14 (annotated)

media/webrtc/trunk/testing/gtest/test/gtest_test_utils.py

Thu, 15 Jan 2015 21:03:48 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 21:03:48 +0100
branch: TOR_BUG_9701
changeset 11: deefc01c0e14
permissions: -rwxr-xr-x

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

 #!/usr/bin/env python
 #
 # Copyright 2006, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
 # in the documentation and/or other materials provided with the
 # distribution.
 #     * Neither the name of Google Inc. nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # 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
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 """Unit test utilities for Google C++ Testing Framework."""
 __author__ = 'wan@google.com (Zhanyong Wan)'
 import atexit
 import os
 import shutil
 import sys
 import tempfile
 import unittest
 _test_module = unittest
 # Suppresses the 'Import not at the top of the file' lint complaint.
 # pylint: disable-msg=C6204
 try:
   import subprocess
   _SUBPROCESS_MODULE_AVAILABLE = True
 except:
   import popen2
   _SUBPROCESS_MODULE_AVAILABLE = False
 # pylint: enable-msg=C6204
 GTEST_OUTPUT_VAR_NAME = 'GTEST_OUTPUT'
 IS_WINDOWS = os.name == 'nt'
 IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
 # Here we expose a class from a particular module, depending on the
 # environment. The comment suppresses the 'Invalid variable name' lint
 # complaint.
 TestCase = _test_module.TestCase  # pylint: disable-msg=C6409
 # Initially maps a flag to its default value. After
 # _ParseAndStripGTestFlags() is called, maps a flag to its actual value.
 _flag_map = {'source_dir': os.path.dirname(sys.argv[0]),
              'build_dir': os.path.dirname(sys.argv[0])}
 _gtest_flags_are_parsed = False
 def _ParseAndStripGTestFlags(argv):
   """Parses and strips Google Test flags from argv.  This is idempotent."""
   # Suppresses the lint complaint about a global variable since we need it
   # here to maintain module-wide state.
   global _gtest_flags_are_parsed  # pylint: disable-msg=W0603
   if _gtest_flags_are_parsed:
     return
   _gtest_flags_are_parsed = True
   for flag in _flag_map:
     # The environment variable overrides the default value.
     if flag.upper() in os.environ:
       _flag_map[flag] = os.environ[flag.upper()]
     # The command line flag overrides the environment variable.
     i = 1  # Skips the program name.
     while i < len(argv):
       prefix = '--' + flag + '='
       if argv[i].startswith(prefix):
         _flag_map[flag] = argv[i][len(prefix):]
         del argv[i]
         break
       else:
         # We don't increment i in case we just found a --gtest_* flag
         # and removed it from argv.
         i += 1
 def GetFlag(flag):
   """Returns the value of the given flag."""
   # In case GetFlag() is called before Main(), we always call
   # _ParseAndStripGTestFlags() here to make sure the --gtest_* flags
   # are parsed.
   _ParseAndStripGTestFlags(sys.argv)
   return _flag_map[flag]
 def GetSourceDir():
   """Returns the absolute path of the directory where the .py files are."""
   return os.path.abspath(GetFlag('source_dir'))
 def GetBuildDir():
   """Returns the absolute path of the directory where the test binaries are."""
   return os.path.abspath(GetFlag('build_dir'))
 _temp_dir = None
 def _RemoveTempDir():
   if _temp_dir:
     shutil.rmtree(_temp_dir, ignore_errors=True)
 atexit.register(_RemoveTempDir)
 def GetTempDir():
   """Returns a directory for temporary files."""
   global _temp_dir
   if not _temp_dir:
     _temp_dir = tempfile.mkdtemp()
   return _temp_dir
 def GetTestExecutablePath(executable_name, build_dir=None):
   """Returns the absolute path of the test binary given its name.
   The function will print a message and abort the program if the resulting file
   doesn't exist.
   Args:
     executable_name: name of the test binary that the test script runs.
     build_dir:       directory where to look for executables, by default
                      the result of GetBuildDir().
   Returns:
     The absolute path of the test binary.
   """
   path = os.path.abspath(os.path.join(build_dir or GetBuildDir(),
                                       executable_name))
   if (IS_WINDOWS or IS_CYGWIN) and not path.endswith('.exe'):
     path += '.exe'
   if not os.path.exists(path):
     message = (
         'Unable to find the test binary. Please make sure to provide path\n'
         'to the binary via the --build_dir flag or the BUILD_DIR\n'
         'environment variable.')
     print >> sys.stderr, message
     sys.exit(1)
   return path
 def GetExitStatus(exit_code):
   """Returns the argument to exit(), or -1 if exit() wasn't called.
   Args:
     exit_code: the result value of os.system(command).
   """
   if os.name == 'nt':
     # On Windows, os.WEXITSTATUS() doesn't work and os.system() returns
     # the argument to exit() directly.
     return exit_code
   else:
     # On Unix, os.WEXITSTATUS() must be used to extract the exit status
     # from the result of os.system().
     if os.WIFEXITED(exit_code):
       return os.WEXITSTATUS(exit_code)
     else:
       return -1
 class Subprocess:
   def __init__(self, command, working_dir=None, capture_stderr=True, env=None):
     """Changes into a specified directory, if provided, and executes a command.
     Restores the old directory afterwards.
     Args:
       command:        The command to run, in the form of sys.argv.
       working_dir:    The directory to change into.
       capture_stderr: Determines whether to capture stderr in the output member
                       or to discard it.
       env:            Dictionary with environment to pass to the subprocess.
     Returns:
       An object that represents outcome of the executed process. It has the
       following attributes:
         terminated_by_signal   True iff the child process has been terminated
                                by a signal.
         signal                 Sygnal that terminated the child process.
         exited                 True iff the child process exited normally.
         exit_code              The code with which the child process exited.
         output                 Child process's stdout and stderr output
                                combined in a string.
     """
     # The subprocess module is the preferrable way of running programs
     # since it is available and behaves consistently on all platforms,
     # including Windows. But it is only available starting in python 2.4.
     # In earlier python versions, we revert to the popen2 module, which is
     # available in python 2.0 and later but doesn't provide required
     # functionality (Popen4) under Windows. This allows us to support Mac
     # OS X 10.4 Tiger, which has python 2.3 installed.
     if _SUBPROCESS_MODULE_AVAILABLE:
       if capture_stderr:
         stderr = subprocess.STDOUT
       else:
         stderr = subprocess.PIPE
       p = subprocess.Popen(command,
                            stdout=subprocess.PIPE, stderr=stderr,
                            cwd=working_dir, universal_newlines=True, env=env)
       # communicate returns a tuple with the file obect for the child's
       # output.
       self.output = p.communicate()[0]
       self._return_code = p.returncode
     else:
       old_dir = os.getcwd()
       def _ReplaceEnvDict(dest, src):
         # Changes made by os.environ.clear are not inheritable by child
         # processes until Python 2.6. To produce inheritable changes we have
         # to delete environment items with the del statement.
         for key in dest.keys():
           del dest[key]
         dest.update(src)
       # When 'env' is not None, backup the environment variables and replace
       # them with the passed 'env'. When 'env' is None, we simply use the
       # current 'os.environ' for compatibility with the subprocess.Popen
       # semantics used above.
       if env is not None:
         old_environ = os.environ.copy()
         _ReplaceEnvDict(os.environ, env)
       try:
         if working_dir is not None:
           os.chdir(working_dir)
         if capture_stderr:
           p = popen2.Popen4(command)
         else:
           p = popen2.Popen3(command)
         p.tochild.close()
         self.output = p.fromchild.read()
         ret_code = p.wait()
       finally:
         os.chdir(old_dir)
         # Restore the old environment variables
         # if they were replaced.
         if env is not None:
           _ReplaceEnvDict(os.environ, old_environ)
       # Converts ret_code to match the semantics of
       # subprocess.Popen.returncode.
       if os.WIFSIGNALED(ret_code):
         self._return_code = -os.WTERMSIG(ret_code)
       else:  # os.WIFEXITED(ret_code) should return True here.
         self._return_code = os.WEXITSTATUS(ret_code)
     if self._return_code < 0:
       self.terminated_by_signal = True
       self.exited = False
       self.signal = -self._return_code
     else:
       self.terminated_by_signal = False
       self.exited = True
       self.exit_code = self._return_code
 def Main():
   """Runs the unit test."""
   # We must call _ParseAndStripGTestFlags() before calling
   # unittest.main().  Otherwise the latter will be confused by the
   # --gtest_* flags.
   _ParseAndStripGTestFlags(sys.argv)
   # The tested binaries should not be writing XML output files unless the
   # script explicitly instructs them to.
   # TODO(vladl@google.com): Move this into Subprocess when we implement
   # passing environment into it as a parameter.
   if GTEST_OUTPUT_VAR_NAME in os.environ:
     del os.environ[GTEST_OUTPUT_VAR_NAME]
   _test_module.main()

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