mcs/tests/test-53.cs

   1 //
   2 // Tests the using statement implementation
   3 //
   4 using System;
   5 using System.IO;
   6
   7 class MyDispose : IDisposable {
   8         public bool disposed;
   9
  10         public void Dispose ()
  11         {
  12                 disposed = true;
  13         }
  14 }
  15
  16 class X {
  17         public static int Main ()
  18         {
  19                 MyDispose copy_a, copy_b, copy_c;
  20
  21                 //
  22                 // Test whether the two `a' and `b' get disposed
  23                 //
  24                 using (MyDispose a = new MyDispose (), b = new MyDispose ()){
  25                         copy_a = a;
  26                         copy_b = b;
  27                 }
  28
  29                 if (!copy_a.disposed)
  30                         return 1;
  31                 if (!copy_b.disposed)
  32                         return 2;
  33
  34                 Console.WriteLine ("Nested using clause disposed");
  35
  36                 //
  37                 // See if the variable `b' is disposed if there is
  38                 // an error thrown inside the using block.
  39                 //
  40                 copy_c = null;
  41                 try {
  42                         using (MyDispose c = new MyDispose ()){
  43                                 copy_c = c;
  44                                 throw new Exception ();
  45                         }
  46                 } catch {}
  47
  48                 if (!copy_c.disposed)
  49                         return 3;
  50                 else
  51                         Console.WriteLine ("Disposal on finally block works");
  52
  53                 //
  54                 // This should test if `a' is non-null before calling dispose
  55                 // implicitly
  56                 //
  57                 using (MyDispose d = null){
  58                 }
  59
  60                 Console.WriteLine ("Null test passed");
  61
  62                 MyDispose bb = new MyDispose ();
  63                 using (bb){
  64
  65                 }
  66                 if (bb.disposed == false)
  67                         return 6;
  68
  69                 Console.WriteLine ("All tests pass");
  70                 return 0;
  71         }
  72 }
  73