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test_emulate_tty.py
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test_emulate_tty.py
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# Copyright 2019 Open Source Robotics Foundation, Inc.
#
# 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.
"""Tests for emulate_tty configuration of ExecuteProcess actions."""
import platform
import sys
import launch
import pytest
class OnExit(object):
def __init__(self):
self.returncode = None
def handle(self, event, context):
self.returncode = event.returncode
def tty_expected_unless_windows():
return 1 if platform.system() != 'Windows' else 0
@pytest.mark.parametrize('test_input,expected', [
# use the default defined by ExecuteProcess
(None, not tty_expected_unless_windows()),
# redundantly override the default via LaunchConfiguration
('true', tty_expected_unless_windows()),
# override the default via LaunchConfiguration
('false', 0),
# redundantly override the default via constructor
(True, tty_expected_unless_windows()),
# override the default via constructor
(False, 0),
])
def test_emulate_tty(test_input, expected):
on_exit = OnExit()
ld = launch.LaunchDescription()
kwargs = {}
if isinstance(test_input, bool):
kwargs['emulate_tty'] = test_input
elif isinstance(test_input, str):
ld.add_action(
launch.actions.SetLaunchConfiguration(
'emulate_tty',
test_input
)
)
ld.add_action(
launch.actions.RegisterEventHandler(
launch.event_handlers.OnProcessExit(on_exit=on_exit.handle)
)
)
ld.add_action(launch.actions.ExecuteProcess(
cmd=[
sys.executable,
'-c',
'import sys; sys.exit(sys.stdout.isatty())',
],
**kwargs
))
ls = launch.LaunchService()
ls.include_launch_description(ld)
ls.run()
assert on_exit.returncode == expected