Reduce DelayedJobSchedulerFacts execution time

Author: odinserj

Diff for: src/Hangfire.Core/Server/DelayedJobScheduler.cs

@@ -134,6 +134,8 @@ public DelayedJobScheduler(TimeSpan pollingDelay, [NotNull] IBackgroundJobStateC
         /// </summary>
         public TaskScheduler TaskScheduler { get; set; }
 
+        internal Func<int, TimeSpan> RetryDelayFunc { get; set; } = attempt => TimeSpan.FromSeconds(attempt);
+
         /// <inheritdoc />
         public void Execute(BackgroundProcessContext context)
         {
@@ -341,7 +343,7 @@ private void EnqueueBackgroundJob(BackgroundProcessContext context, IStorageConn
                     exception = ex;
                 }
 
-                context.Wait(TimeSpan.FromSeconds(retryAttempt));
+                context.Wait(RetryDelayFunc(retryAttempt));
             }
 
             _logger.ErrorException(

Diff for: tests/Hangfire.Core.Tests/Server/DelayedJobSchedulerFacts.cs

@@ -226,7 +226,8 @@ public void Execute_MovesJobToTheFailedState_WithFiltersDisabled_WhenStateChange
                 .Throws<InvalidOperationException>();
 
             var scheduler = CreateScheduler();
-            
+            scheduler.RetryDelayFunc = _ => TimeSpan.FromMilliseconds(50);
+
             // Act
             scheduler.Execute(_context.Object);