imaginary_mirror/source_http_test.go

package main

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

func TestHttpImageSource(t *testing.T) {
	var body []byte
	var err error
	const fixtureFile = "fixtures/large.jpg"

	buf, _ := ioutil.ReadFile(fixtureFile)
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write(buf)
	}))
	defer ts.Close()

	source := NewHttpImageSource(&SourceConfig{})
	fakeHandler := func(w http.ResponseWriter, r *http.Request) {
		if !source.Matches(r) {
			t.Fatal("Cannot match the request")
		}

		body, err = source.GetImage(r)
		if err != nil {
			t.Fatalf("Error while reading the body: %s", err)
		}
		w.Write(body)
	}

	r, _ := http.NewRequest("GET", "http://foo/bar?url="+ts.URL, nil)
	w := httptest.NewRecorder()
	fakeHandler(w, r)

	if len(body) != len(buf) {
		t.Error("Invalid response body")
	}
}

func TestHttpImageSourceError(t *testing.T) {
	var body []byte
	var err error

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(404)
		w.Write([]byte("Not found"))
	}))
	defer ts.Close()

	source := NewHttpImageSource(&SourceConfig{})
	fakeHandler := func(w http.ResponseWriter, r *http.Request) {
		if !source.Matches(r) {
			t.Fatal("Cannot match the request")
		}

		body, err = source.GetImage(r)
		if err == nil {
			t.Fatalf("Server response should not be valid: %s", err)
		}

		w.WriteHeader(404)
		w.Write([]byte(err.Error()))
	}

	r, _ := http.NewRequest("GET", "http://foo/bar?url="+ts.URL, nil)
	w := httptest.NewRecorder()
	fakeHandler(w, r)
}