golang获取昨天日期

func TestTime(tt *testing.T) {
    timeNow := time.Now()
    timeYesterday := timeNow.AddDate(0, 0, -1)
    dateYesterday := timeYesterday.Format("20060102")
    dateNow := timeNow.Format("20060102")
    fmt.Println("昨天：", dateYesterday)
    fmt.Println("今天：", dateNow)
}