Add more coverage for Run main group

[xiantang]

No description provided.

[codecov]

Codecov Report

Merging #284 (a22ced5) into master (a765053) will increase coverage by 8.35%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #284      +/-   ##
==========================================
+ Coverage   42.84%   51.19%   +8.35%     
==========================================
  Files           5        5              
  Lines         838      838              
==========================================
+ Hits          359      429      +70     
+ Misses        434      360      -74     
- Partials       45       49       +4     

Impacted Files	Coverage Δ
runner/util.go	53.10% <0.00%> (-0.57%)	⬇️
runner/config.go	58.11% <0.00%> (+0.52%)	⬆️
runner/engine.go	44.32% <0.00%> (+18.91%)	⬆️

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