Proglib рассказывает свежак в формате рилса

import (
    "net/http"
    "net/http/httptest"
    "testing"
    "io/ioutil"
)

fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    w.WriteHeader(http.StatusOK)
    w.Write([]byte(`{"message": "hello, world!"}`))
}))
defer fakeServer.Close()

func TestGetMessage(t *testing.T) {
    server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte(`{"message": "hello from test"}`))
    }))
    defer server.Close()

    msg, err := GetMessage(server.URL)
    if err != nil || msg == "" {
        t.Errorf("ожидался непустой ответ, получена ошибка: %v", err)
    }
}

httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    w.WriteHeader(http.StatusInternalServerError)
}))

go install github.com/ofabry/go-callvis@latest

go-callvis ./...