test:增加测试用例

utils/timex/time.go

@@ -6,6 +6,10 @@ import (
 
 // AlignTimeToWindow aligns time to window start time
 func AlignTimeToWindow(t time.Time, size time.Duration) time.Time {
+	// Handle zero time
+	if t.IsZero() {
+		return t
+	}
 	offset := t.UnixNano() % int64(size)
 	return t.Add(time.Duration(-offset))
 }
@@ -13,7 +17,7 @@ func AlignTimeToWindow(t time.Time, size time.Duration) time.Time {
 // AlignTime aligns time to specified time unit. When roundUp is true, rounds up; when false, rounds down
 func AlignTime(t time.Time, timeUnit time.Duration, roundUp bool) time.Time {
 	trunc := t.Truncate(timeUnit)
-	if !roundUp {
+	if roundUp && !t.Equal(trunc) {
 		return trunc.Add(timeUnit)
 	}
 	return trunc