added new electron tests supporting date mocking

[khassel]

first PR for #2942

• added new electron tests for calendar which test new css classes from Added css class names "today" and "tomorrow" for calendar #2939
• moved some compliments tests from e2e to electron because of date mocking
• removed mock stuff from compliments module

[codecov-commenter]

Codecov Report

Merging #2947 (397cb0d) into develop (7bbf8c1) will increase coverage by 1.22%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2947      +/-   ##
===========================================
+ Coverage    64.06%   65.28%   +1.22%     
===========================================
  Files            9       14       +5     
  Lines          295      726     +431     
===========================================
+ Hits           189      474     +285     
- Misses         106      252     +146     

Impacted Files	Coverage Δ
js/class.js	63.88% <0.00%> (ø)
modules/default/calendar/calendarutils.js	56.20% <0.00%> (ø)
modules/default/calendar/calendarfetcher.js	80.32% <0.00%> (ø)
modules/default/calendar/node_helper.js	54.28% <0.00%> (ø)
js/node_helper.js	78.04% <0.00%> (ø)
js/server.js	67.56% <0.00%> (+1.35%)	⬆️
js/app.js	70.24% <0.00%> (+9.91%)	⬆️
js/fetch.js	83.33% <0.00%> (+66.66%)	⬆️

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