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

   1 // Permission is hereby granted, free of charge, to any person obtaining
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   6 // permit persons to whom the Software is furnished to do so, subject to
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   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_Property
  32         {
  33                 [Test]
  34                 [ExpectedException (typeof (ArgumentNullException))]
  35                 public void Arg1Null ()
  36                 {
  37                         Expression.Property (null, "NoProperty");
  38                 }
  39
  40                 [Test]
  41                 [ExpectedException (typeof (ArgumentNullException))]
  42                 public void Arg2Null1 ()
  43                 {
  44                         Expression.Property (Expression.Constant (new MemberClass()), (string)null);
  45                 }
  46
  47                 [Test]
  48                 [ExpectedException (typeof (ArgumentNullException))]
  49                 public void Arg2Null2 ()
  50                 {
  51                         Expression.Property (Expression.Constant (new MemberClass()), (PropertyInfo)null);
  52                 }
  53
  54                 [Test]
  55                 [ExpectedException (typeof (ArgumentNullException))]
  56                 public void Arg2Null3 ()
  57                 {
  58                         Expression.Property (Expression.Constant (new MemberClass()), (MethodInfo)null);
  59                 }
  60
  61                 [Test]
  62                 [ExpectedException (typeof (ArgumentException))]
  63                 public void NoProperty ()
  64                 {
  65                         Expression.Property (Expression.Constant (new MemberClass()), "NoProperty");
  66                 }
  67
  68                 [Test]
  69                 public void InstanceProperty1 ()
  70                 {
  71                         MemberExpression expr = Expression.Property (Expression.Constant (new MemberClass()), "TestProperty1");
  72                         Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Property#01");
  73                         Assert.AreEqual (typeof (int), expr.Type, "Property#02");
  74                         Assert.AreEqual ("value(MonoTests.System.Linq.Expressions.MemberClass).TestProperty1", expr.ToString(), "Property#03");
  75                 }
  76
  77                 [Test]
  78                 public void InstanceProperty2 ()
  79                 {
  80                         MemberExpression expr = Expression.Property (Expression.Constant (new MemberClass()), MemberClass.GetRoPropertyInfo());
  81                         Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Property#04");
  82                         Assert.AreEqual (typeof (int), expr.Type, "Property#05");
  83                         Assert.AreEqual ("value(MonoTests.System.Linq.Expressions.MemberClass).TestProperty1", expr.ToString(), "Property#06");
  84                 }
  85
  86                 [Test]
  87                 public void InstanceProperty3 ()
  88                 {
  89                         MethodInfo mi = typeof(MemberClass).GetMethod("get_TestProperty1");
  90
  91                         MemberExpression expr = Expression.Property (Expression.Constant (new MemberClass()), mi);
  92                         Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Property#07");
  93                         Assert.AreEqual (typeof (int), expr.Type, "Property#08");
  94                         Assert.AreEqual ("value(MonoTests.System.Linq.Expressions.MemberClass).TestProperty1", expr.ToString(), "Property#09");
  95                         Assert.AreEqual (MemberClass.GetRoPropertyInfo(), expr.Member, "Property#10");
  96                 }
  97
  98                 [Test]
  99                 [ExpectedException (typeof (ArgumentException))]
 100                 public void StaticProperty1 ()
 101                 {
 102                         // This will fail because access to a static field should be created using a PropertyInfo and
 103                         // not an instance plus the field name.
 104                         Expression.Property (Expression.Constant (new MemberClass()), "StaticProperty");
 105                 }
 106
 107                 [Test]
 108                 public void StaticProperty2 ()
 109                 {
 110                         MemberExpression expr = Expression.Property (null, MemberClass.GetStaticPropertyInfo());
 111                         Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Property#11");
 112                         Assert.AreEqual (typeof (int), expr.Type, "Property#12");
 113                         Assert.AreEqual ("MemberClass.StaticProperty", expr.ToString(), "Property#13");
 114                 }
 115
 116                 [Test]
 117                 public void StaticProperty3 ()
 118                 {
 119                         MethodInfo mi = typeof(MemberClass).GetMethod("get_StaticProperty");
 120
 121                         MemberExpression expr = Expression.Property (null, mi);
 122                         Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Property#14");
 123                         Assert.AreEqual (typeof (int), expr.Type, "Property#15");
 124                         Assert.AreEqual ("MemberClass.StaticProperty", expr.ToString(), "Property#16");
 125                         Assert.AreEqual (MemberClass.GetStaticPropertyInfo(), expr.Member, "Property#17");
 126                 }
 127
 128                 public class Foo {
 129                         public string Prop { get; set; }
 130
 131                         public static string StatProp
 132                         {
 133                                 get { return "StaticFoo"; }
 134                         }
 135                 }
 136
 137                 [Test]
 138                 public void TestCompileGetInstanceProperty ()
 139                 {
 140                         var p = Expression.Parameter (typeof (Foo), "foo");
 141                         var fooer = Expression.Lambda<Func<Foo, string>> (
 142                                 Expression.Property (p, typeof (Foo).GetProperty ("Prop")), p).Compile ();
 143
 144                         Assert.AreEqual ("foo", fooer (new Foo { Prop = "foo" }));
 145                 }
 146
 147                 [Test]
 148                 public void TestCompileGetStaticProperty ()
 149                 {
 150                         var sf = Expression.Lambda<Func<string>> (
 151                                 Expression.Property (null, typeof (Foo).GetProperty (
 152                                 "StatProp", BindingFlags.Public | BindingFlags.Static))).Compile ();
 153
 154                         Assert.AreEqual ("StaticFoo", sf ());
 155                 }
 156
 157                 public struct Bar {
 158                         private string slot;
 159
 160                         public string Prop {
 161                                 get { return slot; }
 162                                 set { slot = value; }
 163                         }
 164
 165                         public Bar (string slot)
 166                         {
 167                                 this.slot = slot;
 168                         }
 169                 }
 170
 171                 [Test]
 172                 public void TestCompileGetInstancePropertyOnStruct ()
 173                 {
 174                         var p = Expression.Parameter (typeof (Bar), "bar");
 175                         var barer = Expression.Lambda<Func<Bar, string>> (
 176                                 Expression.Property (p, typeof (Bar).GetProperty ("Prop")), p).Compile ();
 177
 178                         Assert.AreEqual ("bar", barer (new Bar ("bar")));
 179                 }
 180
 181                 public static int StaticProperty {
 182                         get { return 42; }
 183                 }
 184
 185                 [Test]
 186                 [Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
 187                 [ExpectedException (typeof (ArgumentException))]
 188                 public void StaticPropertyWithInstanceArgument ()
 189                 {
 190                         Expression.Property (
 191                                 Expression.Parameter (GetType (), "t"),
 192                                 GetType ().GetProperty ("StaticProperty"));
 193                 }
 194         }
 195 }