===============================================================================================================================
FAIL: set_param_launch_test.TestFixture.test_set_parameter
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Traceback (most recent call last):
  File "C:\ci\ws\src\ros2\launch_ros\launch_testing_ros\test\examples\set_param_launch_test.py", line 49, in test_set_parameter
    rclpy.init()
  File "C:\ci\ws\install\Lib\site-packages\rclpy\__init__.py", line 76, in init
    return context.init(args, domain_id=domain_id)
  File "C:\ci\ws\install\Lib\site-packages\rclpy\context.py", line 70, in init
    raise RuntimeError('Context.init() must only be called once')
RuntimeError: Context.init() must only be called once
---------------------------- Captured stdout call -----------------------------
[INFO] [launch]: All log files can be found below C:\Users\ContainerAdministrator\.ros\log\2021-09-30-19-48-41-770984-0cec77497c5b-3144
[INFO] [launch]: Default logging verbosity is set to INFO
[INFO] [python.exe-3]: process started with pid [872]
[WARNING] [python.exe-3]: 'SIGINT' sent to process[python.exe-3] not supported on Windows, escalating to 'SIGTERM'
[INFO] [python.exe-3]: sending signal 'SIGTERM' to process[python.exe-3]
[ERROR] [python.exe-3]: process has died [pid 872, exit code 1, cmd 'C:\Python38\python.exe C:\ci\ws\src\ros2\launch_ros\launch_testing_ros\test\examples\parameter_blackboard.py --ros-args -r __node:=demo_node_1'].
---------------------------- Captured stderr call -----------------------------
test_set_parameter (set_param_launch_test.TestFixture) ... ERROR

======================================================================
ERROR: test_set_parameter (set_param_launch_test.TestFixture)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\ci\ws\src\ros2\launch_ros\launch_testing_ros\test\examples\set_param_launch_test.py", line 51, in test_set_parameter
    response = node.set_parameter(state=True)
  File "C:\ci\ws\src\ros2\launch_ros\launch_testing_ros\test\examples\set_param_launch_test.py", line 75, in set_parameter
    return response.results[0]
AttributeError: 'NoneType' object has no attribute 'results'