test(server): add mock mail and queue tests

[fengmk2]

[fengmk2]

• #11056
• #11061 👈 (View in Graphite)
• #11059
• #10418
• #10421
• #10219
• #11032
• #10859
• #10797
• #10755
• canary

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[graphite-app[bot]]

Merge activity

• Mar 23, 11:25 PM EDT: A user added this pull request to the Graphite merge queue.
• Mar 23, 11:50 PM EDT: A user merged this pull request with the Graphite merge queue.

[codecov[bot]]

Codecov Report

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

Project coverage is 54.10%. Comparing base (d62c864) to head (b087133). Report is 1 commits behind head on canary.

Additional details and impacted files

@@           Coverage Diff           @@
##           canary   #11061   +/-   ##
=======================================
  Coverage   54.10%   54.10%           
=======================================
  Files        2533     2533           
  Lines      114935   114941    +6     
  Branches    18631    18631           
=======================================
+ Hits        62180    62193   +13     
+ Misses      51455    51454    -1     
+ Partials     1300     1294    -6     

Flag	Coverage Δ
server-test	78.36% <100.00%> (+<0.01%)	:arrow_up:
unittest	30.16% <ø> (ø)

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