/*
   Copyright 2014 CoreOS, Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package cors

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

func TestCORSInfo(t *testing.T) {
	tests := []struct {
		s     string
		winfo CORSInfo
		ws    string
	}{
		{"", CORSInfo{}, ""},
		{"http://127.0.0.1", CORSInfo{"http://127.0.0.1": true}, "http://127.0.0.1"},
		{"*", CORSInfo{"*": true}, "*"},
		// with space around
		{" http://127.0.0.1 ", CORSInfo{"http://127.0.0.1": true}, "http://127.0.0.1"},
		// multiple addrs
		{
			"http://127.0.0.1,http://127.0.0.2",
			CORSInfo{"http://127.0.0.1": true, "http://127.0.0.2": true},
			"http://127.0.0.1,http://127.0.0.2",
		},
	}
	for i, tt := range tests {
		info := CORSInfo{}
		if err := info.Set(tt.s); err != nil {
			t.Errorf("#%d: set error = %v, want nil", i, err)
		}
		if !reflect.DeepEqual(info, tt.winfo) {
			t.Errorf("#%d: info = %v, want %v", i, info, tt.winfo)
		}
		if g := info.String(); g != tt.ws {
			t.Errorf("#%d: info string = %s, want %s", i, g, tt.ws)
		}
	}
}

func TestCORSInfoOriginAllowed(t *testing.T) {
	tests := []struct {
		set      string
		origin   string
		wallowed bool
	}{
		{"http://127.0.0.1,http://127.0.0.2", "http://127.0.0.1", true},
		{"http://127.0.0.1,http://127.0.0.2", "http://127.0.0.2", true},
		{"http://127.0.0.1,http://127.0.0.2", "*", false},
		{"http://127.0.0.1,http://127.0.0.2", "http://127.0.0.3", false},
		{"*", "*", true},
		{"*", "http://127.0.0.1", true},
	}
	for i, tt := range tests {
		info := CORSInfo{}
		if err := info.Set(tt.set); err != nil {
			t.Errorf("#%d: set error = %v, want nil", i, err)
		}
		if g := info.OriginAllowed(tt.origin); g != tt.wallowed {
			t.Errorf("#%d: allowed = %v, want %v", i, g, tt.wallowed)
		}
	}
}

func TestCORSHandler(t *testing.T) {
	info := &CORSInfo{}
	if err := info.Set("http://127.0.0.1,http://127.0.0.2"); err != nil {
		t.Fatalf("unexpected set error: %v", err)
	}
	h := &CORSHandler{
		Handler: http.NotFoundHandler(),
		Info:    info,
	}

	header := func(origin string) http.Header {
		return http.Header{
			"Access-Control-Allow-Methods": []string{"POST, GET, OPTIONS, PUT, DELETE"},
			"Access-Control-Allow-Origin":  []string{origin},
			"Access-Control-Allow-Headers": []string{"accept, content-type"},
		}
	}
	tests := []struct {
		method  string
		origin  string
		wcode   int
		wheader http.Header
	}{
		{"GET", "http://127.0.0.1", http.StatusNotFound, header("http://127.0.0.1")},
		{"GET", "http://127.0.0.2", http.StatusNotFound, header("http://127.0.0.2")},
		{"GET", "http://127.0.0.3", http.StatusNotFound, http.Header{}},
		{"OPTIONS", "http://127.0.0.1", http.StatusOK, header("http://127.0.0.1")},
	}
	for i, tt := range tests {
		rr := httptest.NewRecorder()
		req := &http.Request{
			Method: tt.method,
			Header: http.Header{"Origin": []string{tt.origin}},
		}
		h.ServeHTTP(rr, req)
		if rr.Code != tt.wcode {
			t.Errorf("#%d: code = %v, want %v", i, rr.Code, tt.wcode)
		}
		// it is set by http package, and there is no need to test it
		rr.HeaderMap.Del("Content-Type")
		if !reflect.DeepEqual(rr.HeaderMap, tt.wheader) {
			t.Errorf("#%d: header = %+v, want %+v", i, rr.HeaderMap, tt.wheader)
		}
	}
}