httptest.Server example

TestServer.go

package main_test

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
)

// GetStatus is the function we want to test. It just return the response.Status.
func GetStatus(url string) (string, error) {
	res, err := http.Get(url)
	if err != nil {
		return "", err
	}
	return res.Status, nil
}

func TestFunc(t *testing.T) {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "Hello, client")
	}))
	defer ts.Close()
	status, _ := GetStatus(ts.URL)
	if status != "200 OK" {
		t.Fatalf("Status error: %s", status)
	}
}