Added some initial tests
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd
improved the tests
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd
refactored OperationFinishedEvent
Merge branch 'cmd' of https://github.com/weeeeeew/GDCN into cmd