feat(testdata): lots of work on new test data data source and scenarios

pkg/tsdb/time_range.go

@@ -7,8 +7,8 @@ import (
 	"time"
 )
 
-func NewTimeRange(from, to string) TimeRange {
-	return TimeRange{
+func NewTimeRange(from, to string) *TimeRange {
+	return &TimeRange{
 		From: from,
 		To:   to,
 		Now:  time.Now(),
@@ -21,13 +21,37 @@ type TimeRange struct {
 	Now  time.Time
 }
 
-func (tr TimeRange) FromTime() (time.Time, error) {
-	if val, err := strconv.ParseInt(tr.From, 10, 64); err == nil {
-		return time.Unix(val, 0), nil
+func (tr *TimeRange) MustGetFrom() time.Time {
+	if res, err := tr.ParseFrom(); err != nil {
+		return time.Unix(0, 0)
+	} else {
+		return res
+	}
+}
+
+func (tr *TimeRange) MustGetTo() time.Time {
+	if res, err := tr.ParseTo(); err != nil {
+		return time.Unix(0, 0)
+	} else {
+		return res
+	}
+}
+
+func tryParseUnixMsEpoch(val string) (time.Time, bool) {
+	if val, err := strconv.ParseInt(val, 10, 64); err == nil {
+		seconds := val / 1000
+		nano := (val - seconds*1000) * 1000000
+		return time.Unix(seconds, nano), true
+	}
+	return time.Time{}, false
+}
+
+func (tr *TimeRange) ParseFrom() (time.Time, error) {
+	if res, ok := tryParseUnixMsEpoch(tr.From); ok {
+		return res, nil
 	}
 
 	fromRaw := strings.Replace(tr.From, "now-", "", 1)
-
 	diff, err := time.ParseDuration("-" + fromRaw)
 	if err != nil {
 		return time.Time{}, err
@@ -36,7 +60,7 @@ func (tr TimeRange) FromTime() (time.Time, error) {
 	return tr.Now.Add(diff), nil
 }
 
-func (tr TimeRange) ToTime() (time.Time, error) {
+func (tr *TimeRange) ParseTo() (time.Time, error) {
 	if tr.To == "now" {
 		return tr.Now, nil
 	} else if strings.HasPrefix(tr.To, "now-") {
@@ -50,8 +74,8 @@ func (tr TimeRange) ToTime() (time.Time, error) {
 		return tr.Now.Add(diff), nil
 	}
 
-	if val, err := strconv.ParseInt(tr.To, 10, 64); err == nil {
-		return time.Unix(val, 0), nil
+	if res, ok := tryParseUnixMsEpoch(tr.To); ok {
+		return res, nil
 	}
 
 	return time.Time{}, fmt.Errorf("cannot parse to value %s", tr.To)