userfront&backend test coverage 추가

backend/internal/utils/audit_test.go

@@ -0,0 +1,27 @@
+package utils
+
+import "testing"
+
+func TestParseAuditDetails(t *testing.T) {
+	t.Run("empty details returns error", func(t *testing.T) {
+		if _, err := ParseAuditDetails(""); err == nil {
+			t.Fatalf("expected empty details error")
+		}
+	})
+
+	t.Run("invalid JSON returns error", func(t *testing.T) {
+		if _, err := ParseAuditDetails("{invalid"); err == nil {
+			t.Fatalf("expected invalid JSON error")
+		}
+	})
+
+	t.Run("valid JSON returns payload", func(t *testing.T) {
+		payload, err := ParseAuditDetails(`{"actor":"admin","count":2}`)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if payload["actor"] != "admin" || payload["count"] != float64(2) {
+			t.Fatalf("unexpected payload: %#v", payload)
+		}
+	})
+}