148 lines
4.5 KiB
Python
148 lines
4.5 KiB
Python
# Copyright 2017 The Abseil Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Helper script used by app_test.py."""
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import os
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import sys
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try:
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import faulthandler
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except ImportError:
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faulthandler = None
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from absl import app
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from absl import flags
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FLAGS = flags.FLAGS
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flags.DEFINE_boolean('faulthandler_sigsegv', False, 'raise SIGSEGV')
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flags.DEFINE_boolean('raise_exception', False, 'Raise MyException from main.')
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flags.DEFINE_boolean(
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'raise_usage_error', False, 'Raise app.UsageError from main.')
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flags.DEFINE_integer(
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'usage_error_exitcode', None, 'The exitcode if app.UsageError if raised.')
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flags.DEFINE_string(
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'str_flag_with_unicode_args', u'thumb:\U0001F44D', u'smile:\U0001F604')
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flags.DEFINE_boolean('print_init_callbacks', False,
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'print init callbacks and exit')
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class MyException(Exception):
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pass
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class MyExceptionHandler(app.ExceptionHandler):
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def __init__(self, message):
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self.message = message
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def handle(self, exc):
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sys.stdout.write('MyExceptionHandler: {}\n'.format(self.message))
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def real_main(argv):
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"""The main function."""
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if os.environ.get('APP_TEST_PRINT_ARGV', False):
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sys.stdout.write('argv: {}\n'.format(' '.join(argv)))
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if FLAGS.raise_exception:
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raise MyException
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if FLAGS.raise_usage_error:
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if FLAGS.usage_error_exitcode is not None:
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raise app.UsageError('Error!', FLAGS.usage_error_exitcode)
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else:
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raise app.UsageError('Error!')
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if FLAGS.faulthandler_sigsegv:
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faulthandler._sigsegv() # pylint: disable=protected-access
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sys.exit(1) # Should not reach here.
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if FLAGS.print_init_callbacks:
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app.call_after_init(lambda: _callback_results.append('during real_main'))
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for value in _callback_results:
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print('callback: {}'.format(value))
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sys.exit(0)
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# Ensure that we have a random C++ flag in flags.FLAGS; this shows
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# us that app.run() did the right thing in conjunction with C++ flags.
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helper_type = os.environ['APP_TEST_HELPER_TYPE']
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if helper_type == 'clif':
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if 'heap_check_before_constructors' in flags.FLAGS:
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print('PASS: C++ flag present and helper_type is {}'.format(helper_type))
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sys.exit(0)
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else:
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print('FAILED: C++ flag absent but helper_type is {}'.format(helper_type))
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sys.exit(1)
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elif helper_type == 'pure_python':
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if 'heap_check_before_constructors' in flags.FLAGS:
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print('FAILED: C++ flag present but helper_type is pure_python')
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sys.exit(1)
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else:
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print('PASS: C++ flag absent and helper_type is pure_python')
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sys.exit(0)
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else:
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print('Unexpected helper_type "{}"'.format(helper_type))
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sys.exit(1)
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def custom_main(argv):
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print('Function called: custom_main.')
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real_main(argv)
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def main(argv):
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print('Function called: main.')
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real_main(argv)
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flags_parser_argv_sentinel = object()
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def flags_parser_main(argv):
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print('Function called: main_with_flags_parser.')
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if argv is not flags_parser_argv_sentinel:
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sys.exit(
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'FAILED: main function should be called with the return value of '
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'flags_parser, but found: {}'.format(argv))
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def flags_parser(argv):
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print('Function called: flags_parser.')
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if os.environ.get('APP_TEST_FLAGS_PARSER_PARSE_FLAGS', None):
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FLAGS(argv)
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return flags_parser_argv_sentinel
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# Holds results from callbacks triggered by `app.run_after_init`.
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_callback_results = []
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if __name__ == '__main__':
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kwargs = {'main': main}
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main_function_name = os.environ.get('APP_TEST_CUSTOM_MAIN_FUNC', None)
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if main_function_name:
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kwargs['main'] = globals()[main_function_name]
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custom_argv = os.environ.get('APP_TEST_CUSTOM_ARGV', None)
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if custom_argv:
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kwargs['argv'] = custom_argv.split(' ')
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if os.environ.get('APP_TEST_USE_CUSTOM_PARSER', None):
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kwargs['flags_parser'] = flags_parser
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app.call_after_init(lambda: _callback_results.append('before app.run'))
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app.install_exception_handler(MyExceptionHandler('first'))
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app.install_exception_handler(MyExceptionHandler('second'))
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app.run(**kwargs)
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sys.exit('This is not reachable.')
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