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

   1 //
   2 // ExpressionTest_ListInit.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;
  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_ListInit {
  40
  41                 public class Foo {
  42                 }
  43
  44                 public class Bar : IEnumerable {
  45
  46                         public IEnumerator GetEnumerator ()
  47                         {
  48                                 throw new NotImplementedException ();
  49                         }
  50                 }
  51
  52                 public class Baz : Bar {
  53
  54                         public void Add (object a, object b)
  55                         {
  56                         }
  57                 }
  58
  59                 static NewExpression CreateNewList ()
  60                 {
  61                         return Expression.New (typeof (List<string>));
  62                 }
  63
  64                 [Test]
  65                 [ExpectedException (typeof (ArgumentNullException))]
  66                 public void NullExpression ()
  67                 {
  68                         Expression.ListInit (null, new List<ElementInit> ());
  69                 }
  70
  71                 [Test]
  72                 [ExpectedException (typeof (ArgumentNullException))]
  73                 public void NullElementInitializer ()
  74                 {
  75                         Expression.ListInit (CreateNewList (), new ElementInit [] { null });
  76                 }
  77
  78                 [Test]
  79                 [ExpectedException (typeof (ArgumentNullException))]
  80                 public void NullExpressionInitializer ()
  81                 {
  82                         Expression.ListInit (CreateNewList (), new Expression [] { null });
  83                 }
  84
  85                 [Test]
  86                 [ExpectedException (typeof (InvalidOperationException))]
  87                 public void ExpressionTypeDoesntImplementIEnumerable ()
  88                 {
  89                         Expression.ListInit (Expression.New (typeof (Foo)), "foo".ToConstant ());
  90                 }
  91
  92                 [Test]
  93                 [ExpectedException (typeof (InvalidOperationException))]
  94                 public void ExpressionTypeDoesnHaveAddMethod ()
  95                 {
  96                         Expression.ListInit (Expression.New (typeof (Bar)), "foo".ToConstant ());
  97                 }
  98
  99                 [Test]
 100                 public void InitListOfStringWithConstants ()
 101                 {
 102                         var li = Expression.ListInit (
 103                                 Expression.New (typeof (List<string>)),
 104                                 "foo".ToConstant (), "bar".ToConstant ());
 105
 106                         Assert.AreEqual (typeof (List<string>), li.Type);
 107                         Assert.AreEqual (ExpressionType.ListInit, li.NodeType);
 108                         Assert.AreEqual ("new List`1() {Void Add(System.String)(\"foo\"), Void Add(System.String)(\"bar\")}", li.ToString ());
 109                 }
 110
 111                 [Test]
 112                 public void InitListOfStringWithElementInitializers ()
 113                 {
 114                         var li = Expression.ListInit (
 115                                 Expression.New (typeof (List<string>)),
 116                                 Expression.ElementInit (
 117                                         typeof (List<string>).GetMethod ("Add"),
 118                                         "foo".ToConstant ()),
 119                                 Expression.ElementInit (
 120                                         typeof (List<string>).GetMethod ("Add"),
 121                                         "bar".ToConstant ()));
 122
 123                         Assert.AreEqual (typeof (List<string>), li.Type);
 124                         Assert.AreEqual (ExpressionType.ListInit, li.NodeType);
 125                         Assert.AreEqual ("new List`1() {Void Add(System.String)(\"foo\"), Void Add(System.String)(\"bar\")}", li.ToString ());
 126                 }
 127
 128                 [Test]
 129                 public void CompileListOfStringsInit ()
 130                 {
 131                         var add = typeof (List<string>).GetMethod ("Add");
 132
 133                         var c = Expression.Lambda<Func<List<string>>> (
 134                                 Expression.ListInit (
 135                                         Expression.New (typeof (List<string>)),
 136                                         Expression.ElementInit (add, "foo".ToConstant ()),
 137                                         Expression.ElementInit (add, "bar".ToConstant ()))).Compile     ();
 138
 139                         var list = c ();
 140
 141                         Assert.IsNotNull (list);
 142                         Assert.AreEqual (2, list.Count);
 143                         Assert.AreEqual ("foo", list [0]);
 144                         Assert.AreEqual ("bar", list [1]);
 145                 }
 146
 147                 [Test]
 148                 [Category ("NotDotNet")]
 149                 public void CompileArrayListOfStringsInit ()
 150                 {
 151                         var add = typeof (ArrayList).GetMethod ("Add");
 152
 153                         var c = Expression.Lambda<Func<ArrayList>> (
 154                                 Expression.ListInit (
 155                                         Expression.New (typeof (ArrayList)),
 156                                         Expression.ElementInit (add, "foo".ToConstant ()),
 157                                         Expression.ElementInit (add, "bar".ToConstant ()))).Compile ();
 158
 159                         var list = c ();
 160
 161                         Assert.IsNotNull (list);
 162                         Assert.AreEqual (2, list.Count);
 163                         Assert.AreEqual ("foo", list [0]);
 164                         Assert.AreEqual ("bar", list [1]);
 165                 }
 166         }
 167 }