Added test for ToString
Added test for ToString

fable-compiler/Fable,fable-compiler/Fable,ncave/Fable,fable-compiler/Fable,fable-compiler/Fable,ncave/Fable,fable-compiler/Fable,ncave/Fable,ncave/Fable,ncave/Fable,ncave/Fable,ncave/Fable,inosik/Fable,fable-compiler/Fable,inosik/Fable,fable-compiler/Fable