Only testing the shape of the output, not the correctness of the output

[hanson-hschang]

https://github.com/hanson-hschang/BR2/blob/246324bb8094e7768187ffdc99195de02693ea5c/tests/test_actuation_tool.py#L29-L91

@skim0119 as shown in the link, what's the proper way of testing these operations? Currently, it is only testing the shape of the output, but not the correctness.

[skim0119]

Instead of random number, use some set of known_values and expected_answer.

Example: https://docs.pytest.org/en/stable/how-to/parametrize.html#pytest-mark-parametrize-parametrizing-test-functions

Typically we don't use random number for numerical test, because it is hard to debug when the test goes wrong (i.e. the test is not reproducible).