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

   1 //
   2 // ExpressionTest_ListBind.cs
   3 //
   4 // Author:
   5 //   olivier Dufour (olivier.duff@gmail.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.Reflection;
  31 using System.Collections.Generic;
  32 using System.Linq;
  33 using System.Linq.Expressions;
  34 using NUnit.Framework;
  35
  36 namespace MonoTests.System.Linq.Expressions {
  37
  38         [TestFixture]
  39         public class ExpressionTest_ListBind {
  40
  41                 [Test]
  42                 [ExpectedException (typeof (ArgumentNullException))]
  43                 public void MemberNull ()
  44                 {
  45                         Expression.ListBind (null as MemberInfo, new List<ElementInit> ());
  46                 }
  47
  48                 [Test]
  49                 [ExpectedException (typeof (ArgumentNullException))]
  50                 public void PropertyAccessorNull ()
  51                 {
  52                         Expression.ListBind (null as MethodInfo, new List<ElementInit> ());
  53                 }
  54
  55                 [Test]
  56                 [ExpectedException (typeof (ArgumentNullException))]
  57                 public void ArgNull ()
  58                 {
  59                         var list = new List<ElementInit> ();
  60                         list.Add (null);
  61                         Expression.ListBind (typeof (Foo).GetProperty ("Bar").GetSetMethod (), list);
  62                 }
  63
  64                 [Test]
  65                 [ExpectedException (typeof (ArgumentException))]
  66                 public void MemberTypeImplementIEnumerable ()
  67                 {
  68                         Expression.ListBind (typeof (Foo).GetMember ("baz") [0], new List<ElementInit> ());
  69                 }
  70
  71                 [Test]
  72                 [ExpectedException (typeof (ArgumentException))]
  73                 public void MethodeGetImplementIEnumerable2 ()
  74                 {
  75                         Expression.ListBind (typeof (Foo).GetProperty ("BarBar").GetGetMethod (), new List<ElementInit> ());
  76                 }
  77
  78                 [Test]
  79                 [ExpectedException (typeof (ArgumentException))]
  80                 public void MethodMustBeAnAccessor ()
  81                 {
  82                         Expression.ListBind (typeof (Foo).GetMethod ("test"), new List<ElementInit> ());
  83                 }
  84
  85                 [Test]
  86                 public void ListBindToString ()
  87                 {
  88                         var add = typeof (List<string>).GetMethod ("Add");
  89
  90                         var list = new List<ElementInit> () {
  91                                 Expression.ElementInit (add, Expression.Constant ("foo")),
  92                                 Expression.ElementInit (add, Expression.Constant ("bar")),
  93                                 Expression.ElementInit (add, Expression.Constant ("baz")),
  94                         };
  95
  96                         var binding = Expression.ListBind (typeof (Foo).GetProperty ("List"), list);
  97
  98                         Assert.AreEqual ("List = {Void Add(System.String)(\"foo\"), Void Add(System.String)(\"bar\"), Void Add(System.String)(\"baz\")}", binding.ToString ());
  99                 }
 100
 101                 [Test]
 102                 public void CompiledListBinding ()
 103                 {
 104                         var add = typeof (List<string>).GetMethod ("Add");
 105
 106                         var lb = Expression.Lambda<Func<Foo>> (
 107                                 Expression.MemberInit (
 108                                         Expression.New (typeof (Foo)),
 109                                         Expression.ListBind (
 110                                                 typeof (Foo).GetProperty ("List"),
 111                                                 Expression.ElementInit (add, Expression.Constant ("foo")),
 112                                                 Expression.ElementInit (add, Expression.Constant ("bar")),
 113                                                 Expression.ElementInit (add, Expression.Constant ("baz"))))).Compile ();
 114
 115                         var foo = lb ();
 116
 117                         Assert.IsNotNull (foo);
 118                         Assert.AreEqual (3, foo.List.Count);
 119                         Assert.AreEqual ("foo", foo.List [0]);
 120                         Assert.AreEqual ("bar", foo.List [1]);
 121                         Assert.AreEqual ("baz", foo.List [2]);
 122                 }
 123
 124                 public class Foo {
 125
 126                         public string [] foo;
 127                         public string str;
 128
 129                         public int baz;
 130
 131                         private List<string> list = new List<string> ();
 132
 133                         public List<string> List {
 134                                 get { return list; }
 135                         }
 136
 137                         public string [] Bar
 138                         {
 139                                 get { return foo; }
 140                                 set { foo = value; }
 141                         }
 142
 143                         public int BarBar
 144                         {
 145                                 get { return 0; }
 146                         }
 147
 148                         public string [] test ()
 149                         {
 150                                 return null;
 151                         }
 152                 }
 153         }
 154 }