gtest_test_utils.Subprocess Class Reference

Public Member Functions
def	__init__ (self, command, working_dir=None, capture_stderr=True, env=None)

Public Attributes
	output
	terminated_by_signal
	exited
	exit_code

Detailed Description

Definition at line 202 of file gtest_test_utils.py.

Constructor & Destructor Documentation

__init__()

def gtest_test_utils.Subprocess.__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 if and only if the child process has been
                           terminated by a signal.
    exited                 True if and only if 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.

Definition at line 203 of file gtest_test_utils.py.

  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 if and only if the child process has been
                               terminated by a signal.
        exited                 True if and only if 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 object 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 bool(self._return_code & 0x80000000):
      self.terminated_by_signal = True
      self.exited = False
    else:
      self.terminated_by_signal = False
      self.exited = True
      self.exit_code = self._return_code
 
 

Member Data Documentation

exit_code

gtest_test_utils.Subprocess.exit_code

Definition at line 297 of file gtest_test_utils.py.

exited

gtest_test_utils.Subprocess.exited

Definition at line 293 of file gtest_test_utils.py.

output

gtest_test_utils.Subprocess.output

Definition at line 245 of file gtest_test_utils.py.

terminated_by_signal

gtest_test_utils.Subprocess.terminated_by_signal

Definition at line 292 of file gtest_test_utils.py.

---

The documentation for this class was generated from the following file:

• /media/home/debian/src/github/tesseract-ocr/tesseract/unittest/third_party/googletest/googletest/test/gtest_test_utils.py