/*
 * Copyright 2020 The Knative Authors
 * 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 main

import (
	"fmt"
	"net"
	"net/http"
	"net/http/httptest"
	"syscall"
	"testing"
	"time"

	"github.com/wavesoftware/go-ensure"
	"knative.dev/eventing/test/upgrade/prober/wathola/config"
)

func TestSenderMain(t *testing.T) {
	ts := createMockServer()
	defer ts.Close()

	p := syscall.Getpid()
	go main()
	time.Sleep(500 * time.Millisecond)
	err := syscall.Kill(p, syscall.SIGTERM)
	ensure.NoError(err)
	time.Sleep(500 * time.Millisecond)
}

func createMockServer() *httptest.Server {
	l, err := net.Listen("tcp",
		fmt.Sprintf(":%d", config.DefaultForwarderPort),
	)
	ensure.NoError(err)
	ts := &httptest.Server{
		Listener: l,
		Config: &http.Server{
			Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				w.WriteHeader(200)
			}),
		},
	}
	ts.Start()
	return ts
}
