func TestSetsRemoteAddr(t *testing.T) { defer afterTest(t) ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) { fmt.Fprintf(w, "%s", r.RemoteAddr) })) defer ts.Close() res, err := Get(ts.URL) if err != nil { t.Fatalf("Get error: %v", err) } body, err := ioutil.ReadAll(res.Body) if err != nil { t.Fatalf("ReadAll error: %v", err) } ip := string(body) if !strings.HasPrefix(ip, "1
![go test で出来ること](https://cdn-ak-scissors.b.st-hatena.com/image/square/debe3d1c0e156f79c9eac7debbf8ebaf8c8d8ca0/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9Z28lMjB0ZXN0JTIwJUUzJTgxJUE3JUU1JTg3JUJBJUU2JTlEJUE1JUUzJTgyJThCJUUzJTgxJTkzJUUzJTgxJUE4JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1kNGExZjMyMGFlYTY1N2VjMGE3NThjOWYwYzk2MDcyOQ%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwdGFpem8mdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPWZiNjk1YzUxN2M5ZGExNDRiZmMxMzIzOGM1NGY0NTlm%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D04f062411170f6414c1465f1d64c2d44)