package test

import (
	"fmt"
	"io"
	"os"
	"testing"
)

func TestIO(t *testing.T) {
	//file, err := os.OpenFile("b.txt", os.O_RDONLY, 0)
	file, err := os.OpenFile("b.txt", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0)
	if err != nil {
		panic(err)
	}
	defer file.Close()
	contentBytes, err := io.ReadAll(file)
	fmt.Println(string(contentBytes))
}