mcs/tests/test-async-59.cs

   1 using System;
   2 using System.Threading;
   3 using System.Threading.Tasks;
   4
   5 class X
   6 {
   7         static bool unobserved;
   8
   9         public static int Main ()
  10         {
  11                 TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
  12                 try {
  13                         Test ().Wait ();
  14
  15                         GC.Collect ();
  16                         GC.WaitForPendingFinalizers ();
  17                         if (unobserved)
  18                                 return 1;
  19
  20                         return 0;
  21                 } finally {
  22                         TaskScheduler.UnobservedTaskException -= TaskScheduler_UnobservedTaskException;
  23                 }
  24         }
  25
  26         static void TaskScheduler_UnobservedTaskException (object sender, UnobservedTaskExceptionEventArgs e)
  27         {
  28                 unobserved = true;
  29                 Console.WriteLine ("unobserved");
  30         }
  31
  32         static async Task Test ()
  33         {
  34                 try {
  35                         await ThrowAsync ();
  36                 } catch {
  37                 }
  38         }
  39
  40         static async Task ThrowAsync()
  41         {
  42                 await Task.Delay (5);
  43
  44                 throw new Exception ("boom");
  45         }
  46 }