public static async Task Test(BotAdapter adapter)
{
using var turnContext = new TurnContext(adapter, new Activity());
var activities = new[]
{
new Activity(ActivityTypes.Delay, value: 275),
new Activity(ActivityTypes.Delay, value: 275L),
new Activity(ActivityTypes.Delay, value: 275F),
new Activity(ActivityTypes.Delay, value: 275D),
};
Stopwatch sw = new Stopwatch();
sw.Start();
await adapter.SendActivitiesAsync(turnContext, activities, default);
sw.Stop();
Assert.True(sw.Elapsed.TotalSeconds > 1, $"Delay only lasted {sw.Elapsed}");
}