在以下環(huán)境中：code$ pwd/home/user1/codecode$ echo $GOPATH/home/user1/golib:/home/user1/codecode$ lsbin  pkg  src code$ ls src/github.com/myhub/codingtest/main.go  test_main.gocode$ code$ code$ code$ code$ code$ cat src/github.com/myhub/codingtest/test_main.go package mainimport "testing"func TestSplit(t *testing.T) {        gotAllButLast, gotLast := split(2013)        wantAllButLast := 201        wantLast := 3        if gotAllButLast != wantAllButLast {                t.Errorf("got %d but expected %d", gotAllButLast, wantAllButLast)        }        if wantLast != gotLast {                t.Errorf("got %d but expected %d", gotLast, wantLast)        }}code$ code$ code$ code$ code$ code$ cat src/github.com/myhub/codingtest/main.go package main// Spit n into all but its last digit and its last digitfunc split(n int) (int, int) {        return n / 10, n % 10}func main() {}code$ go test給出以下錯(cuò)誤：code$ go test github.com/myhub/codingtest?       github.com/myhub/codingtest   [no test files]code$ code$ code$ code$ code$ code$ 如何解決no test files error？