func GetRandomLink(host string) string{
    log.Print("My function is used!")
    return "http://example.com/path1"
}

type TlinksMap struct{
    GetRandomLink func(host string) string
}


type generic struct{
    TlinksMap
}

func TestBasic(t *testing.T) {
    linksMap = &generic{TlinksMap: &TlinksMap{GetRandomLink: GetRandomLink}}
}