package main

import (
	"bytes"
	"sync"
)

// SyncBuffer is a buffer that the test and the client use at once.
type SyncBuffer struct {
	mutex  sync.Mutex
	buffer bytes.Buffer
}

func (b *SyncBuffer) Write(p []byte) (int, error) {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	return b.buffer.Write(p)
}

func (b *SyncBuffer) String() string {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	return b.buffer.String()
}