/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 util

import (
	"math/rand"
	"net"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
)

func TestReadAndWriteBytes(t *testing.T) {
	path := "/tmp/test.sock"
	server, err := net.Listen("unix", path)
	assert.NoError(t, err)
	defer server.Close()

	// transfer large enough data
	n := 10000000

	const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
	in := make([]byte, n)
	for i := range in {
		in[i] = letterBytes[rand.Intn(len(letterBytes))]
	}

	go func() {
		client, err := net.DialTimeout("unix", path, 1*time.Second)
		assert.NoError(t, err)
		defer client.Close()
		WriteBytes(client, in, len(in))
	}()

	fd, err := server.Accept()
	assert.NoError(t, err)
	out := make([]byte, n)
	ReadBytes(fd, out, n)
	assert.Equal(t, in, out)
}
