fixed #60

Backend/helper/time_test.go

@@ -18,7 +18,7 @@ func TestGetMonday(t *testing.T) {
 }
 
 func TestFormatDuration(t *testing.T) {
-	durations := []struct {
+	testCases := []struct {
 		name     string
 		duration time.Duration
 	}{
@@ -28,9 +28,9 @@ func TestFormatDuration(t *testing.T) {
 		{"-1h 30min", time.Duration(-90 * time.Minute)},
 		{"", 0},
 	}
-	for _, d := range durations {
-		t.Run(d.name, func(t *testing.T) {
-			if FormatDuration(d.duration) != d.name {
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			if FormatDuration(tc.duration) != tc.name {
 				t.Error("Format missmatch in Formatduration.")
 			}
 		})
@@ -58,3 +58,27 @@ func TestGetWorkingDays(t *testing.T) {
 		})
 	}
 }
+
+func TestFormatGermanDayOfWeek(t *testing.T) {
+	testCases := []struct {
+		date   string
+		result string
+	}{
+		{"2025-12-01", "Mo"},
+		{"2025-12-02", "Di"},
+		{"2025-12-03", "Mi"},
+		{"2025-12-04", "Do"},
+		{"2025-12-05", "Fr"},
+		{"2025-12-06", "Sa"},
+		{"2025-12-07", "So"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("FormatWeekDayTest: %s date", tc.date), func(t *testing.T) {
+			date, _ := time.Parse(time.DateOnly, tc.date)
+			if FormatGermanDayOfWeek(date) != tc.result {
+				t.Error("Formatted workday did not match!")
+			}
+		})
+	}
+}