[Rust] Fixed enum tests
[Rust] Fixed enum tests

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