mcs/tests/test-372.cs

   1 // Some interfaces, one is a superset of the other
   2 public interface Node
   3 {
   4     int GetStat();
   5 }
   6 public interface FileNode : Node
   7 {
   8     int NotUsed();
   9 }
  10
  11 // Some basic implementations, one is a superset of the other
  12 public class GenericNode : Node
  13 {
  14     public virtual int GetStat() { return 0; }
  15 }
  16
  17 public class GenericFileNode : GenericNode , FileNode
  18 {
  19     public virtual int NotUsed() { return -1; }
  20 }
  21
  22
  23 // Now the ability to override a method depends on if we specify again that we
  24 // implement an interface -- although we must because we derive from a class
  25 // that does.
  26 public class WorkingTest : GenericFileNode , FileNode
  27 {
  28     public override int GetStat() { return 42; }
  29 }
  30
  31 public class FailingTest : GenericFileNode
  32 {
  33     // This never gets called, but it builds, so what did we override?!!!
  34     public override int GetStat() { return 42; }
  35 }
  36
  37 public class TestWrapper
  38 {
  39     static bool Test(Node inst, string name)
  40     {
  41         if(inst.GetStat() == 42)
  42         {
  43             System.Console.WriteLine("{0} -- Passed", name);
  44             return true;
  45         } else
  46         {
  47             System.Console.WriteLine("{0} -- FAILED", name);
  48             return false;
  49         }
  50     }
  51
  52     public static int Main()
  53     {
  54         if( Test(new WorkingTest(), "WorkingTest")
  55                 && Test(new FailingTest(), "FailingTest") )
  56             return 0; // everything worked
  57         else
  58             return 1;
  59     }
  60 }
  61
  62
  63