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# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""This is a library for working with test executables in a way that is
Chromium-bot-friendly as specified by //docs/testing/test_executable_api.md
Example usage:
import os
import sys
import main_program
import rust_main_program
if __name__ == '__main__':
cmdline_parser = argparse.ArgumentParser()
main_program.add_cmdline_args(cmdline_parser)
... adding other cmdline parameter definitions ...
parsed_cmdline_args = cmdline_parser.parse_args()
test_executable_wrappers = []
test_executable_wrappers.append(
rust_main_program.TestExecutableWrapper(...))
...
main_program.main(
test_executable_wrappers, parsed_cmdline_args, os.environ)
"""
import time
import test_filtering
import test_results
def add_cmdline_args(argparse_parser):
"""Adds test-filtering-specific cmdline parameter definitions to
`argparse_parser`.
Args:
argparse_parser: An object of argparse.ArgumentParser type.
"""
test_filtering.add_cmdline_args(argparse_parser)
test_results.add_cmdline_args(argparse_parser)
argparse_parser.add_argument(
'--isolated-script-test-launcher-retry-limit',
dest='retry_limit',
default=3,
help='Sets the limit of test retries on failures to N.',
metavar='N',
type=int)
argparse_parser.add_argument('--isolated-script-test-repeat',
dest='repetitions',
default=1,
help='Repeats each test N times.',
metavar='N',
type=int)
def _calculate_tests_to_run(argparse_parsed_args, env,
test_executable_wrappers):
tests = []
for wrapper in test_executable_wrappers:
extra_tests = wrapper.list_all_tests()
for extra_test in extra_tests:
assert extra_test not in tests
tests.extend(extra_tests)
return test_filtering.filter_tests(argparse_parsed_args, env, tests)
def _run_tests_and_save_results(argparse_parsed_args, list_of_tests_to_run,
test_executable_wrapper):
start_time = time.time()
results = []
for wrapper in test_executable_wrapper:
results.extend(wrapper.run_tests(list_of_tests_to_run))
test_results.print_test_results(argparse_parsed_args, results, start_time)
def main(test_executable_wrappers, argparse_parsed_args, env):
"""Runs tests within `test_executable_wrappers` using cmdline arguments and
environment variables to figure out 1) which subset of tests to run, 2)
where to save the JSON file with test results.
Args:
test_executable_wrappers: A list of objects providing
list_all_tests(...) and run_tests(...) methods (see
rust_main_program._TestExecutableWrapper).
argparse_parsed_arg: A result of an earlier call to
argparse_parser.parse_args() call (where `argparse_parser` has been
populated via an even earlier call to add_cmdline_args).
env: a dictionary-like object (typically from `os.environ`).
"""
list_of_test_names_to_run = _calculate_tests_to_run(
argparse_parsed_args, env, test_executable_wrappers)
_run_tests_and_save_results(argparse_parsed_args,
list_of_test_names_to_run,
test_executable_wrappers)
# TODO(lukasza): Repeat tests `args.repetitions` times.
# TODO(lukasza): Retry failing times up to `args.retry_limit` times.
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