Add more tests

[jhaals]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.72%. Comparing base (044f411) to head (51cca07).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/yopass-server/main.go	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2512      +/-   ##
==========================================
+ Coverage   69.65%   71.72%   +2.06%     
==========================================
  Files           8        8              
  Lines         669      672       +3     
==========================================
+ Hits          466      482      +16     
+ Misses        172      158      -14     
- Partials       31       32       +1     

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