how to pass topic message via launch_test with ros2

asked 2020-02-13 18:37:54 -0600

i want to launch a node via launch_test command , and pass argument(through the topic message) to the node to test whether it is correct, how to do it? (i have already check the link:, it seems can't pass argument through topic) or is there other way to achieve the requirement? thank very much!

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