package client

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

func TestEncode(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("response"))
	}))
	defer server.Close()
	client := CaesarClient{Endpoint: server.URL} // HL
	r, err := client.EncodeMessage(strings.NewReader("secret message"))
	if err != nil {
		t.Errorf("should not have gotten error: %v", err)
	}
	if r == nil {
		t.Fatalf("should have gotten a reader")
	}
	resp, err := ioutil.ReadAll(r)
	if err != nil {
		t.Fatalf("could not read message: %v", err)
	}
	if string(resp) != "response" {
		t.Errorf("expected 'response' but got '%s'", resp)
	}
}

func TestUserAgent(t *testing.T) {
	var ua string
	var hf http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
		ua = r.Header.Get("user-agent")
	}
	server := httptest.NewServer(hf)
	defer server.Close()

	c := CaesarClient{Endpoint: server.URL}
	c.EncodeMessage(strings.NewReader("secret message"))

	expected := "caesar-client/1.0"
	if ua != expected {
		t.Errorf("expected user agent header %q but got %q", expected, ua)
	}
}