Add tests for RunCommand

[villfa]

Closes #158

[codecov]

Codecov Report

Merging #273 (6b63ead) into master (c6e59a6) will increase coverage by 1.13%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #273      +/-   ##
============================================
+ Coverage     96.14%   97.27%   +1.13%     
  Complexity      176      176              
============================================
  Files            24       24              
  Lines           441      441              
============================================
+ Hits            424      429       +5     
+ Misses           17       12       -5     

Impacted Files	Coverage Δ	Complexity Δ
src/Command/RunCommand.php	85.18% <0.00%> (+9.25%)	14.00% <0.00%> (ø%)

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