mcs/tests/gtest-etree-05.cs

   1 using System;
   2 using System.Linq.Expressions;
   3 using System.Collections;
   4 using System.Collections.Generic;
   5
   6 class C
   7 {
   8         static void AssertNodeType (LambdaExpression e, ExpressionType et)
   9         {
  10                 if (e.Body.NodeType != et)
  11                         throw new ApplicationException (e.Body.NodeType + " != " + et);
  12         }
  13
  14         static void Assert<T> (T expected, T value)
  15         {
  16                 if (!EqualityComparer<T>.Default.Equals (expected, value)) {
  17                         throw new ApplicationException (expected + " != " + value);
  18                 }
  19         }
  20
  21         public static int Main()
  22         {
  23                 // It also tests constant boxing
  24                 Expression<Func<ArrayList>> e1 = () => new ArrayList { null, "Hello", "World", 5 };
  25                 AssertNodeType (e1, ExpressionType.ListInit);
  26                 /* Verification exception on .NET */
  27                 var re1 = e1.Compile ().Invoke ();
  28
  29                 Assert (null, re1 [0]);
  30                 Assert ("Hello", re1 [1]);
  31                 Assert ("World", re1 [2]);
  32                 Assert (5, re1 [3]);
  33
  34                 Console.WriteLine ("OK");
  35                 return 0;
  36         }
  37 }