mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest_MemberInit.cs

   1 //
   2 // ExpressionTest_MemberInit.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@novell.com)
   6 //
   7 // (C) 2008 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections.Generic;
  31 using System.Reflection;
  32 using System.Linq;
  33 using System.Linq.Expressions;
  34
  35 using NUnit.Framework;
  36
  37 namespace MonoTests.System.Linq.Expressions {
  38
  39         [TestFixture]
  40         public class ExpressionTest_MemberInit {
  41
  42                 public class Foo {
  43                         public string Bar;
  44                         public string Baz;
  45                 }
  46
  47                 public class Gazonk {
  48                         public string Tzap;
  49                 }
  50
  51                 [Test]
  52                 [ExpectedException (typeof (ArgumentNullException))]
  53                 public void NullExpression ()
  54                 {
  55                         Expression.MemberInit (null, new MemberBinding [0]);
  56                 }
  57
  58                 [Test]
  59                 [ExpectedException (typeof (ArgumentNullException))]
  60                 public void NullBindings ()
  61                 {
  62                         Expression.MemberInit (
  63                                 Expression.New (typeof (Foo)),
  64                                 null);
  65                 }
  66
  67                 [Test]
  68                 [ExpectedException (typeof (ArgumentException))]
  69                 public void MemberNotAssignableToNewType ()
  70                 {
  71                         Expression.MemberInit (
  72                                 Expression.New (typeof (Foo)),
  73                                 new MemberBinding [] { Expression.Bind (typeof (Gazonk).GetField ("Tzap"), "tzap".ToConstant ()) });
  74                 }
  75
  76                 [Test]
  77                 public void InitFields ()
  78                 {
  79                         var m = Expression.MemberInit (
  80                                 Expression.New (typeof (Foo)),
  81                                 new MemberBinding [] {
  82                                         Expression.Bind (typeof (Foo).GetField ("Bar"), "bar".ToConstant ()),
  83                                         Expression.Bind (typeof (Foo).GetField ("Baz"), "baz".ToConstant ()) });
  84
  85                         Assert.AreEqual (typeof (Foo), m.Type);
  86                         Assert.AreEqual (ExpressionType.MemberInit, m.NodeType);
  87                         Assert.AreEqual ("new Foo() {Bar = \"bar\", Baz = \"baz\"}", m.ToString ());
  88                 }
  89
  90                 public class Thing {
  91                         public string Foo;
  92                         public string Bar { get; set; }
  93                 }
  94
  95                 [Test]
  96                 [Category ("NotWorkingInterpreter")]
  97                 public void CompiledInit ()
  98                 {
  99                         var i = Expression.Lambda<Func<Thing>> (
 100                                 Expression.MemberInit (
 101                                         Expression.New (typeof (Thing)),
 102                                         Expression.Bind (typeof (Thing).GetField ("Foo"), "foo".ToConstant ()),
 103                                         Expression.Bind (typeof (Thing).GetProperty ("Bar"), "bar".ToConstant ()))).Compile ();
 104
 105                         var thing = i ();
 106                         Assert.IsNotNull (thing);
 107                         Assert.AreEqual ("foo", thing.Foo);
 108                         Assert.AreEqual ("bar", thing.Bar);
 109                 }
 110         }
 111 }