website/shared/http/middleware_test.go

package http

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

func TestCorsMiddleware(t *testing.T) {
	t.Run("default", func(t *testing.T) {
		wrapped := CorsMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			w.Write([]byte("OK"))
		}), "https://www.example.net")
		w := httptest.NewRecorder()
		r := httptest.NewRequest(http.MethodGet, "/", nil)
		wrapped.ServeHTTP(w, r)
		if h := w.Header().Get("Access-Control-Allow-Origin"); h != "https://www.example.net" {
			t.Errorf("Unexpected header value %v", h)
		}
	})
}

func TestContentTypeMiddleware(t *testing.T) {
	t.Run("default", func(t *testing.T) {
		wrapped := ContentTypeMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			w.Write([]byte("OK"))
		}), "application/json")
		w := httptest.NewRecorder()
		r := httptest.NewRequest(http.MethodGet, "/", nil)
		wrapped.ServeHTTP(w, r)
		if h := w.Header().Get("Content-Type"); h != "application/json" {
			t.Errorf("Unexpected header value %v", h)
		}
	})
}

func TestDoNotTrackMiddleware(t *testing.T) {
	wrapped := DoNotTrackMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("hey there"))
	}))
	t.Run("with header", func(t *testing.T) {
		w := httptest.NewRecorder()
		r := httptest.NewRequest(http.MethodGet, "/", nil)
		r.Header.Set("DNT", "1")
		wrapped.ServeHTTP(w, r)

		if w.Code != http.StatusNoContent {
			t.Errorf("Unexpected status code %d", w.Code)
		}

		if w.Body.String() != "" {
			t.Errorf("Unexpected response body %s", w.Body.String())
		}
	})
	t.Run("without header", func(t *testing.T) {
		w := httptest.NewRecorder()
		r := httptest.NewRequest(http.MethodGet, "/", nil)
		wrapped.ServeHTTP(w, r)

		if w.Code != http.StatusOK {
			t.Errorf("Unexpected status code %d", w.Code)
		}

		if w.Body.String() != "hey there" {
			t.Errorf("Unexpected response body %s", w.Body.String())
		}
	})
	t.Run("with header allowing", func(t *testing.T) {
		w := httptest.NewRecorder()
		r := httptest.NewRequest(http.MethodGet, "/", nil)
		r.Header.Set("DNT", "0")
		wrapped.ServeHTTP(w, r)

		if w.Code != http.StatusOK {
			t.Errorf("Unexpected status code %d", w.Code)
		}

		if w.Body.String() != "hey there" {
			t.Errorf("Unexpected response body %s", w.Body.String())
		}
	})
}