create test for output_requirements

[fredgrub]

This PR creates a test for the output_requirements function.

• Take advantage of the fact that the file creation has already been tested by comparing it with the standard output (captured previously).

[alan-barzilay]

Dont forget to rebase your PR

[fredgrub]

I just updated the PR description with more details.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

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Additional details and impacted files

@@           Coverage Diff           @@
##             next     #395   +/-   ##
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  Coverage        ?   89.27%           
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  Files           ?        2           
  Lines           ?      261           
  Branches        ?        0           
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  Hits            ?      233           
  Misses          ?       28           
  Partials        ?        0           

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