updated time

main_test.go

@@ -2,15 +2,16 @@ package main
 
 import (
 	"bytes"
-	"os"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"strings"
 	"testing"
+	"time"
 )
 
 func TestHandleIndexRendersWatts(t *testing.T) {
-	srv := &server{secret: "secret", store: &store{value: 123}}
+	srv := &server{secret: "secret", store: &store{value: 123, updatedAt: time.Date(2026, 4, 20, 12, 34, 56, 0, time.UTC)}}
 	req := httptest.NewRequest(http.MethodGet, "/", nil)
 	rec := httptest.NewRecorder()
 
@@ -22,6 +23,12 @@ func TestHandleIndexRendersWatts(t *testing.T) {
 	if !strings.Contains(rec.Body.String(), "123") {
 		t.Fatalf("response did not contain watt value: %s", rec.Body.String())
 	}
+	if !strings.Contains(rec.Body.String(), "Last updated:") {
+		t.Fatalf("response did not contain last updated label: %s", rec.Body.String())
+	}
+	if !strings.Contains(rec.Body.String(), "20.04.2026 12:34:56") {
+		t.Fatalf("response did not contain german datetime: %s", rec.Body.String())
+	}
 }
 
 func TestHandleWriteRequiresSecret(t *testing.T) {
@@ -52,6 +59,9 @@ func TestHandleWriteStoresValue(t *testing.T) {
 	if got := srv.store.get(); got != 456 {
 		t.Fatalf("stored watts = %d, want %d", got, 456)
 	}
+	if srv.store.updatedAt.IsZero() {
+		t.Fatal("updatedAt was not set")
+	}
 }
 
 func TestLoadConfig(t *testing.T) {