class/System.Core/Test/System.Linq.Expressions/ExpressionTest_Quote.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 //
  19 // Authors:
  20 //              Federico Di Gregorio <fog@initd.org>
  21
  22 using System;
  23 using System.Reflection;
  24 using System.Linq;
  25 using System.Linq.Expressions;
  26 using NUnit.Framework;
  27
  28 namespace MonoTests.System.Linq.Expressions
  29 {
  30         [TestFixture]
  31         public class ExpressionTest_Quote
  32         {
  33                 [Test]
  34                 [ExpectedException (typeof (ArgumentNullException))]
  35                 public void Arg1Null ()
  36                 {
  37                         Expression.Quote (null);
  38                 }
  39
  40 #if !NET_4_0
  41                 [Test]
  42                 public void QuoteConstant ()
  43                 {
  44                         UnaryExpression expr = Expression.Quote (Expression.Constant (1));
  45                         Assert.AreEqual (ExpressionType.Quote, expr.NodeType, "Quote#01");
  46                         Assert.AreEqual (typeof (ConstantExpression), expr.Type, "Quote#02");
  47                         Assert.AreEqual ("1", expr.ToString(), "Quote#03");
  48                 }
  49 #else
  50                 [Test]
  51                 [ExpectedException (typeof (ArgumentException))]
  52                 public void QuoteConstant ()
  53                 {
  54                         Expression.Quote (Expression.Constant (1));
  55                 }
  56 #endif
  57
  58                 [Test]
  59                 public void CompiledQuote ()
  60                 {
  61                         var quote42 = Expression.Lambda<Func<Expression<Func<int>>>> (
  62                                 Expression.Quote (
  63                                         Expression.Lambda<Func<int>> (
  64                                                 42.ToConstant ()))).Compile ();
  65
  66                         var get42 = quote42 ().Compile ();
  67
  68                         Assert.AreEqual (42, get42 ());
  69                 }
  70
  71                 [Test]
  72                 public void ParameterInQuotedExpression () // #550722
  73                 {
  74                         // Expression<Func<string, Expression<Func<string>>>> e = (string s) => () => s;
  75
  76                         var s = Expression.Parameter (typeof (string), "s");
  77
  78                         var lambda = Expression.Lambda<Func<string, Expression<Func<string>>>> (
  79                                 Expression.Quote (
  80                                         Expression.Lambda<Func<string>> (s, new ParameterExpression [0])),
  81                                 s);
  82
  83                         var fs = lambda.Compile () ("bingo").Compile ();
  84
  85                         Assert.AreEqual ("bingo", fs ());
  86                 }
  87         }
  88 }