c3e0f26bef
Use the vendored copy of the `six` library to make this code work across Python versions. Bug: 942720 Change-Id: I4bdb1032ed8e89e733b929eb13ada54efeb3b019 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2229335 Commit-Queue: Chris McDonald <cjmcdonald@chromium.org> Reviewed-by: Dirk Pranke <dpranke@chromium.org> Reviewed-by: Ben Pastene <bpastene@chromium.org> Cr-Commit-Position: refs/heads/master@{#774934}
95 lines
2.7 KiB
Python
Executable File
95 lines
2.7 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2019 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Unit tests for test_env.py functionality.
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Each unit test is launches python process that uses test_env.py
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to launch another python process. Then signal handling and
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propagation is tested. This similates how Swarming uses test_env.py.
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"""
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import os
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import signal
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import subprocess
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import sys
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import time
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import unittest
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HERE = os.path.dirname(os.path.abspath(__file__))
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TEST_SCRIPT = os.path.join(HERE, 'test_env_user_script.py')
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def launch_process_windows(args):
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# The `universal_newlines` option is equivalent to `text` in Python 3.
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return subprocess.Popen(
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[sys.executable, TEST_SCRIPT] + args,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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env=os.environ.copy(),
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creationflags=subprocess.CREATE_NEW_PROCESS_GROUP,
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universal_newlines=True)
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def launch_process_nonwindows(args):
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# The `universal_newlines` option is equivalent to `text` in Python 3.
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return subprocess.Popen(
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[sys.executable, TEST_SCRIPT] + args,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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env=os.environ.copy(),
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universal_newlines=True)
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def read_subprocess_message(proc, starts_with):
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"""Finds the value after first line prefix condition."""
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for line in proc.stdout:
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if line.startswith(starts_with):
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return line.rstrip().replace(starts_with, '')
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def send_and_wait(proc, sig, sleep_time=0.3):
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"""Sends a signal to subprocess."""
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time.sleep(sleep_time) # gives process time to launch.
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os.kill(proc.pid, sig)
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proc.wait()
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class SignalingWindowsTest(unittest.TestCase):
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def setUp(self):
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super(SignalingWindowsTest, self).setUp()
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if sys.platform != 'win32':
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self.skipTest('test only runs on Windows')
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def test_send_ctrl_break_event(self):
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proc = launch_process_windows([])
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send_and_wait(proc, signal.CTRL_BREAK_EVENT)
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sig = read_subprocess_message(proc, 'Signal :')
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self.assertEqual(sig, str(int(signal.SIGBREAK)))
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class SignalingNonWindowsTest(unittest.TestCase):
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def setUp(self):
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super(SignalingNonWindowsTest, self).setUp()
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if sys.platform == 'win32':
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self.skipTest('test does not run on Windows')
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def test_send_sigterm(self):
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proc = launch_process_nonwindows([])
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send_and_wait(proc, signal.SIGTERM)
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sig = read_subprocess_message(proc, 'Signal :')
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self.assertEqual(sig, str(int(signal.SIGTERM)))
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def test_send_sigint(self):
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proc = launch_process_nonwindows([])
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send_and_wait(proc, signal.SIGINT)
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sig = read_subprocess_message(proc, 'Signal :')
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self.assertEqual(sig, str(int(signal.SIGINT)))
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if __name__ == '__main__':
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unittest.main()
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