Add more tests

[blink1073]

This might get us to 80%...

[codecov]

Codecov Report

Base: 79.39% // Head: 80.30% // Increases project coverage by +0.91% 🎉

Coverage data is based on head (a7df1db) compared to base (2206a47).
Patch coverage: 50.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1092      +/-   ##
==========================================
+ Coverage   79.39%   80.30%   +0.91%     
==========================================
  Files          68       68              
  Lines        8294     8297       +3     
  Branches     1652     1652              
==========================================
+ Hits         6585     6663      +78     
+ Misses       1284     1202      -82     
- Partials      425      432       +7     

Impacted Files	Coverage Δ
jupyter_server/pytest_plugin.py	90.53% <50.00%> (-0.55%)	⬇️
...ter_server/services/kernels/connection/channels.py	58.38% <0.00%> (-1.09%)	⬇️
jupyter_server/extension/manager.py	92.68% <0.00%> (ø)
jupyter_server/serverapp.py	80.12% <0.00%> (+3.35%)	⬆️
jupyter_server/services/contents/fileio.py	90.00% <0.00%> (+15.26%)	⬆️
jupyter_server/base/websocket.py	68.11% <0.00%> (+21.73%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[blink1073]

Woohoo!