junit: Use the timestamp from the gtr.Report when creating Testsuites

go-junit-report.go

@@ -7,7 +7,6 @@ import (
 	"io"
 	"os"
 	"strings"
-	"time"
 
 	"github.com/jstemmer/go-junit-report/v2/pkg/junit"
 	"github.com/jstemmer/go-junit-report/v2/pkg/parser/gotest"
@@ -94,7 +93,7 @@ func main() {
 	}
 
 	hostname, _ := os.Hostname() // ignore error
-	testsuites := junit.CreateFromReport(report, hostname, time.Now())
+	testsuites := junit.CreateFromReport(report, hostname)
 
 	var out io.Writer = os.Stdout
 	if *output != "" {

go-junit-report_test.go

@@ -191,7 +191,12 @@ func testReport(input, reportFile, packageName string, t *testing.T) {
 	}
 	defer file.Close()
 
-	parser := gotest.New(gotest.PackageName(packageName))
+	parser := gotest.New(
+		gotest.PackageName(packageName),
+		gotest.TimestampFunc(func() time.Time {
+			return time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+		}),
+	)
 
 	report, err := parser.Parse(file)
 	if err != nil {
@@ -204,8 +209,7 @@ func testReport(input, reportFile, packageName string, t *testing.T) {
 		}
 	}
 
-	testTime := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
-	actual := junit.CreateFromReport(report, "hostname", testTime)
+	actual := junit.CreateFromReport(report, "hostname")
 
 	expectedXML, err := loadTestReport(reportFile, "")
 	if err != nil {

pkg/junit/junit.go

@@ -127,16 +127,17 @@ type Output struct {
 }
 
 // CreateFromReport creates a JUnit representation of the given gtr.Report.
-func CreateFromReport(report gtr.Report, hostname string, timestamp time.Time) Testsuites {
-	ts := timestamp.Format(time.RFC3339)
-
+func CreateFromReport(report gtr.Report, hostname string) Testsuites {
 	var suites Testsuites
 	for _, pkg := range report.Packages {
 		var duration time.Duration
 		suite := Testsuite{
-			Name:      pkg.Name,
-			Timestamp: ts,
-			Hostname:  hostname,
+			Name:     pkg.Name,
+			Hostname: hostname,
+		}
+
+		if !pkg.Timestamp.IsZero() {
+			suite.SetTimestamp(pkg.Timestamp)
 		}
 
 		for k, v := range pkg.Properties {