// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Tests for client.go

package http_test

import (
	"fmt"
	. "http"
	"http/httptest"
	"io/ioutil"
	"os"
	"strings"
	"testing"
)

var robotsTxtHandler = HandlerFunc(func(w ResponseWriter, r *Request) {
	w.Header().Set("Last-Modified", "sometime")
	fmt.Fprintf(w, "User-agent: go\nDisallow: /something/")
})

func TestClient(t *testing.T) {
	ts := httptest.NewServer(robotsTxtHandler)
	defer ts.Close()

	r, _, err := Get(ts.URL)
	var b []byte
	if err == nil {
		b, err = ioutil.ReadAll(r.Body)
		r.Body.Close()
	}
	if err != nil {
		t.Error(err)
	} else if s := string(b); !strings.HasPrefix(s, "User-agent:") {
		t.Errorf("Incorrect page body (did not begin with User-agent): %q", s)
	}
}

func TestClientHead(t *testing.T) {
	ts := httptest.NewServer(robotsTxtHandler)
	defer ts.Close()

	r, err := Head(ts.URL)
	if err != nil {
		t.Fatal(err)
	}
	if _, ok := r.Header["Last-Modified"]; !ok {
		t.Error("Last-Modified header not found.")
	}
}

type recordingTransport struct {
	req *Request
}

func (t *recordingTransport) Do(req *Request) (resp *Response, err os.Error) {
	t.req = req
	return nil, os.NewError("dummy impl")
}

func TestGetRequestFormat(t *testing.T) {
	tr := &recordingTransport{}
	client := &Client{Transport: tr}
	url := "http://dummy.faketld/"
	client.Get(url) // Note: doesn't hit network
	if tr.req.Method != "GET" {
		t.Errorf("expected method %q; got %q", "GET", tr.req.Method)
	}
	if tr.req.URL.String() != url {
		t.Errorf("expected URL %q; got %q", url, tr.req.URL.String())
	}
	if tr.req.Header == nil {
		t.Errorf("expected non-nil request Header")
	}
}