Add tests for #19
Add tests for #19

edjafarov/PromisePipe,netProgrammer/PromisePipe,SilentImp/PromisePipe,Rastopyr/PromisePipe,SilentImp/PromisePipe,edjafarov/PromisePipe,Rastopyr/PromisePipe,netProgrammer/PromisePipe