You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
320 lines
11 KiB
320 lines
11 KiB
#!/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]
|
|
|
|
# The environment variable for specifying the path to the premature-exit file.
|
|
PREMATURE_EXIT_FILE_ENV_VAR = 'TEST_PREMATURE_EXIT_FILE'
|
|
|
|
environ = os.environ.copy()
|
|
|
|
|
|
def SetEnvVar(env_var, value):
|
|
"""Sets/unsets an environment variable to a given value."""
|
|
|
|
if value is not None:
|
|
environ[env_var] = value
|
|
elif env_var in environ:
|
|
del environ[env_var]
|
|
|
|
|
|
# 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()
|