[golang] http handler test

handler_test.go

package main

import (
  “net/http”
  “net/http/httptest”
  “testing”
)

fun TestHandler(t *testing.T) {
  req, err := http.NewRequest(
              http.MethodGet,
              “http://localhost/foobar”,
              nil,
  )
  if err != nil {
    t.Fatalf(“could not create request: %v”, err)
  }

  // recorder satisfies the http response interface
  rec := httptest.NewRecorder()

  // handler is some http handler function we wrote that we want to test
  handler(rec, req)

  if rec.Code != http.StatusOK {
    t.Errorf(“expected status 200; got %d”, rec.Code)
  }
}