GOPATH not set correctly

i was installed go on xubuntu. after that iI change the GOPATH on

$ export GOPATH=$HOME/go
$ echo $GOPATH
$ /home/rangga/go

if I do go run

$ go run /home/rangga/go/src/Test/testpath.go
$ /home/rangga

i used os.Getwd() for test the current path

it should be the output like these /home/rangga/go/src/Test

FYI, here's my go env

GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/rangga/go"
GORACE=""
GOROOT="/usr"
GOTOOLDIR="/usr/lib/gccgo/tool"
TERM="dumb"
CC="gcc"
GOGCCFLAGS="-g -O2 -fPIC -m64 -pthread"
CXX="g++"
CGO_ENABLED="1"

do i made wrong in export GOPATH?, please how to make the GOPATH is workable on go language?

thank you

EDIT
ok, this is my mistake i should change to the current work directory after then do go run

thanks to peterSO

> Package os
>
> func Getwd
>
> func Getwd() (dir string, err error)
>
> Getwd returns a rooted path name corresponding to the current
> directory. If the current directory can be reached via multiple paths
> (due to symbolic links), Getwd may return any one of them.

$ go run /home/rangga/go/src/Test/testpath.go
$ /home/rangga

You got what you asked for, your current directory: /home/rangga.

Change your current directory,

$ cd /home/rangga/go/src/Test/
$ go run testpath.go
$ /home/rangga/go/src/Test