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# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# =============================================================================
"""Test to make sure stack trace is generated in case of test failures."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import argparse
import os
import signal
import subprocess
import sys
from tensorflow.python.platform import test
from tensorflow.python.platform import tf_logging as logging
# FLAGS defined at the bottom:
# child (bool) set to true if we are running in the child process.
FLAGS = None
_CHILD_FLAG_HELP = 'Boolean. Set to true if this is the child process.'
class StacktraceHandlerTest(test.TestCase):
def testChildProcessKillsItself(self):
if FLAGS.child:
os.kill(os.getpid(), signal.SIGABRT)
def testGeneratesStacktrace(self):
if FLAGS.child:
return
# Subprocess sys.argv[0] with --child=True
if sys.executable:
child_process = subprocess.Popen(
[sys.executable, sys.argv[0], '--child=True'], cwd=os.getcwd(),
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
else:
child_process = subprocess.Popen(
[sys.argv[0], '--child=True'], cwd=os.getcwd(),
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# Capture its output. capture both stdout and stderr and append them.
# We are not worried about timing or order of messages in this test.
child_stdout, child_stderr = child_process.communicate()
child_output = child_stdout + child_stderr
# Make sure the child process is dead before we proceed.
child_process.wait()
logging.info('Output from the child process:')
logging.info(child_output)
# Verify a stack trace is printed.
self.assertIn(b'PyEval_EvalFrame', child_output)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument(
'--child', type=bool, default=False, help=_CHILD_FLAG_HELP)
FLAGS, unparsed = parser.parse_known_args()
# Now update argv, so that unittest library does not get confused.
sys.argv = [sys.argv[0]] + unparsed
test.main()
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