    text: `User 1: t=${(clock.Date.now() - 600) / 1_000}s`,
          type: 'message'
        });

        clock.tick(10_000);

        await directLine.emulateIncomingActivity({
          from: { id: 'user', role: 'user' },
          text: `User 2: t=${(clock.Date.now() - 600) / 1_000}s`,
          type: 'message'
        });

        await host.snapshot('local');
      });
    </script>
  </body>
</html>
