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TreeWeb::Artículos::Golang::How to test an http server in Golang
Permalink: 30/01/2016

How to test an http server in Golang

First of all, an HTTP server could be anything implementing the `Handler` interface:
type Handler interface { ServeHTTP(ResponseWriter, *Request) }
And you can start listening as simple as:
http.ListenAndServe("", my_server)
But how about the testing? Easy, you should start a test server:
ts := httptest.NewServer(my_server)
I have my test server. And now what? Call it like if it was any other http server:
req, _ := http.Get(WHAT_IS_THE_URL) res, _ := http.DefaultClient.Do(req)
And now the difference: our test server has started a real server, the url is: ts.URL
Remember to close it after your tests are finished:
All this things put together:
func Test_404_OK(t *testing.T) { server := NewServer() ts := httptest.NewServer(server) defer ts.Close() req, _ := http.NewRequest("GET", ts.URL+"/hello", strings.NewReader("")) res, _ := http.DefaultClient.Do(req) if 200 != res.StatusCode { t.Error("Expecting status code is 200") } }