add unittest with description to indicate intension about CWL hints handling

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.71%. Comparing base (320f594) to head (860a4dc).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #635 +/- ## ======================================= Coverage 85.70% 85.71% ======================================= Files 79 79 Lines 18585 18585 Branches 2847 2847 ======================================= + Hits 15929 15930 +1 Misses 1916 1916 + Partials 740 739 -1 ```

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