mcs/class/corlib/Test/System.Reflection/PropertyInfoTest.cs

   1 //
   2 // PropertyInfoTest.cs - NUnit Test Cases for PropertyInfo
   3 //
   4 // Author:
   5 //      Gert Driesen (drieseng@users.sourceforge.net)
   6 //
   7 // (C) 2004-2007 Gert Driesen
   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
  30 using System;
  31 using System.Reflection;
  32 using System.Runtime.InteropServices;
  33 using System.Threading;
  34 #if !MONOTOUCH
  35 using System.Reflection.Emit;
  36 #endif
  37 using System.IO;
  38
  39 using NUnit.Framework;
  40
  41 namespace MonoTests.System.Reflection
  42 {
  43         [TestFixture]
  44         public class PropertyInfoTest
  45         {
  46                 [Test]
  47                 public void GetAccessorsTest ()
  48                 {
  49                         Type type = typeof (TestClass);
  50                         PropertyInfo property = type.GetProperty ("ReadOnlyProperty");
  51
  52                         MethodInfo [] methods = property.GetAccessors (true);
  53                         Assert.AreEqual (1, methods.Length, "#A1");
  54                         Assert.IsNotNull (methods [0], "#A2");
  55                         Assert.AreEqual ("get_ReadOnlyProperty", methods [0].Name, "#A3");
  56
  57                         methods = property.GetAccessors (false);
  58                         Assert.AreEqual (1, methods.Length, "#B1");
  59                         Assert.IsNotNull (methods [0], "#B2");
  60                         Assert.AreEqual ("get_ReadOnlyProperty", methods [0].Name, "#B3");
  61
  62                         property = typeof (Base).GetProperty ("P");
  63
  64                         methods = property.GetAccessors (true);
  65                         Assert.AreEqual (2, methods.Length, "#C1");
  66                         Assert.IsNotNull (methods [0], "#C2");
  67                         Assert.IsNotNull (methods [1], "#C3");
  68                         Assert.IsTrue (HasMethod (methods, "get_P"), "#C4");
  69                         Assert.IsTrue (HasMethod (methods, "set_P"), "#C5");
  70
  71                         methods = property.GetAccessors (false);
  72                         Assert.AreEqual (2, methods.Length, "#D1");
  73                         Assert.IsNotNull (methods [0], "#D2");
  74                         Assert.IsNotNull (methods [1], "#D3");
  75                         Assert.IsTrue (HasMethod (methods, "get_P"), "#D4");
  76                         Assert.IsTrue (HasMethod (methods, "set_P"), "#D5");
  77
  78                         methods = property.GetAccessors ();
  79                         Assert.AreEqual (2, methods.Length, "#E1");
  80                         Assert.IsNotNull (methods [0], "#E2");
  81                         Assert.IsNotNull (methods [1], "#E3");
  82                         Assert.IsTrue (HasMethod (methods, "get_P"), "#E4");
  83                         Assert.IsTrue (HasMethod (methods, "set_P"), "#E5");
  84
  85                         property = typeof (TestClass).GetProperty ("Private",
  86                                 BindingFlags.NonPublic | BindingFlags.Instance);
  87
  88                         methods = property.GetAccessors (true);
  89                         Assert.AreEqual (2, methods.Length, "#F1");
  90                         Assert.IsNotNull (methods [0], "#F2");
  91                         Assert.IsNotNull (methods [1], "#F3");
  92                         Assert.IsTrue (HasMethod (methods, "get_Private"), "#F4");
  93                         Assert.IsTrue (HasMethod (methods, "set_Private"), "#F5");
  94
  95                         methods = property.GetAccessors (false);
  96                         Assert.AreEqual (0, methods.Length, "#G");
  97
  98                         methods = property.GetAccessors ();
  99                         Assert.AreEqual (0, methods.Length, "#H");
 100
 101 #if NET_2_0
 102                         property = typeof (TestClass).GetProperty ("PrivateSetter");
 103
 104                         methods = property.GetAccessors (true);
 105                         Assert.AreEqual (2, methods.Length, "#H1");
 106                         Assert.IsNotNull (methods [0], "#H2");
 107                         Assert.IsNotNull (methods [1], "#H3");
 108                         Assert.IsTrue (HasMethod (methods, "get_PrivateSetter"), "#H4");
 109                         Assert.IsTrue (HasMethod (methods, "set_PrivateSetter"), "#H5");
 110
 111                         methods = property.GetAccessors (false);
 112                         Assert.AreEqual (1, methods.Length, "#I1");
 113                         Assert.IsNotNull (methods [0], "#I2");
 114                         Assert.AreEqual ("get_PrivateSetter", methods [0].Name, "#I3");
 115
 116                         methods = property.GetAccessors ();
 117                         Assert.AreEqual (1, methods.Length, "#J1");
 118                         Assert.IsNotNull (methods [0], "#J2");
 119                         Assert.AreEqual ("get_PrivateSetter", methods [0].Name, "#J3");
 120 #endif
 121                 }
 122
 123                 [Test]
 124                 public void GetCustomAttributes ()
 125                 {
 126                         object [] attrs;
 127                         PropertyInfo p = typeof (Base).GetProperty ("P");
 128
 129                         attrs = p.GetCustomAttributes (false);
 130                         Assert.AreEqual (1, attrs.Length, "#A1");
 131                         Assert.AreEqual (typeof (ThisAttribute), attrs [0].GetType (), "#A2");
 132                         attrs = p.GetCustomAttributes (true);
 133                         Assert.AreEqual (1, attrs.Length, "#A3");
 134                         Assert.AreEqual (typeof (ThisAttribute), attrs [0].GetType (), "#A4");
 135
 136                         p = typeof (Base).GetProperty ("T");
 137
 138                         attrs = p.GetCustomAttributes (false);
 139                         Assert.AreEqual (2, attrs.Length, "#B1");
 140                         Assert.IsTrue (HasAttribute (attrs, typeof (ThisAttribute)), "#B2");
 141                         Assert.IsTrue (HasAttribute (attrs, typeof (ComVisibleAttribute)), "#B3");
 142                         attrs = p.GetCustomAttributes (true);
 143                         Assert.AreEqual (2, attrs.Length, "#B41");
 144                         Assert.IsTrue (HasAttribute (attrs, typeof (ThisAttribute)), "#B5");
 145                         Assert.IsTrue (HasAttribute (attrs, typeof (ComVisibleAttribute)), "#B6");
 146
 147                         p = typeof (Base).GetProperty ("Z");
 148
 149                         attrs = p.GetCustomAttributes (false);
 150                         Assert.AreEqual (0, attrs.Length, "#C1");
 151                         attrs = p.GetCustomAttributes (true);
 152                         Assert.AreEqual (0, attrs.Length, "#C2");
 153                 }
 154
 155                 [Test]
 156                 public void GetCustomAttributes_Inherited ()
 157                 {
 158                         object [] attrs;
 159                         PropertyInfo p = typeof (Derived).GetProperty ("P");
 160
 161                         attrs = p.GetCustomAttributes (false);
 162                         Assert.AreEqual (0, attrs.Length, "#A1");
 163                         attrs = p.GetCustomAttributes (true);
 164                         Assert.AreEqual (0, attrs.Length, "#A3");
 165
 166                         p = typeof (Derived).GetProperty ("T");
 167
 168                         attrs = p.GetCustomAttributes (false);
 169                         Assert.AreEqual (2, attrs.Length, "#B1");
 170                         Assert.IsTrue (HasAttribute (attrs, typeof (ThisAttribute)), "#B2");
 171                         Assert.IsTrue (HasAttribute (attrs, typeof (ComVisibleAttribute)), "#B3");
 172                         attrs = p.GetCustomAttributes (true);
 173                         Assert.AreEqual (2, attrs.Length, "#B41");
 174                         Assert.IsTrue (HasAttribute (attrs, typeof (ThisAttribute)), "#B5");
 175                         Assert.IsTrue (HasAttribute (attrs, typeof (ComVisibleAttribute)), "#B6");
 176
 177                         p = typeof (Derived).GetProperty ("Z");
 178
 179                         attrs = p.GetCustomAttributes (false);
 180                         Assert.AreEqual (0, attrs.Length, "#C1");
 181                         attrs = p.GetCustomAttributes (true);
 182                         Assert.AreEqual (0, attrs.Length, "#C2");
 183                 }
 184
 185                 [Test]
 186                 public void IsDefined_AttributeType_Null ()
 187                 {
 188                         Type derived = typeof (Derived);
 189                         PropertyInfo pi = derived.GetProperty ("P");
 190
 191                         try {
 192                                 pi.IsDefined ((Type) null, false);
 193                                 Assert.Fail ("#1");
 194                         } catch (ArgumentNullException ex) {
 195                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
 196                                 Assert.IsNull (ex.InnerException, "#3");
 197                                 Assert.IsNotNull (ex.Message, "#4");
 198                                 Assert.IsNotNull (ex.ParamName, "#5");
 199                                 Assert.AreEqual ("attributeType", ex.ParamName, "#6");
 200                         }
 201                 }
 202
 203                 [Test]
 204                 public void AccessorsReflectedType ()
 205                 {
 206                         PropertyInfo pi = typeof (Derived).GetProperty ("T");
 207                         Assert.AreEqual (typeof (Derived), pi.GetGetMethod ().ReflectedType);
 208                         Assert.AreEqual (typeof (Derived), pi.GetSetMethod ().ReflectedType);
 209                 }
 210
 211                 [Test] // bug #399985
 212                 public void SetValue_Enum ()
 213                 {
 214                         TestClass t = new TestClass ();
 215                         PropertyInfo pi = t.GetType ().GetProperty ("Targets");
 216                         pi.SetValue (t, AttributeTargets.Field, null);
 217                         Assert.AreEqual (AttributeTargets.Field, t.Targets, "#1");
 218                         pi.SetValue (t, (int) AttributeTargets.Interface, null);
 219                         Assert.AreEqual (AttributeTargets.Interface, t.Targets, "#2");
 220                 }
 221
 222                 public class ThisAttribute : Attribute
 223                 {
 224                 }
 225
 226                 class Base
 227                 {
 228                         [ThisAttribute]
 229                         public virtual string P {
 230                                 get { return null; }
 231                                 set { }
 232                         }
 233
 234                         [ThisAttribute]
 235                         [ComVisible (false)]
 236                         public virtual string T {
 237                                 get { return null; }
 238                                 set { }
 239                         }
 240
 241                         public virtual string Z {
 242                                 get { return null; }
 243                                 set { }
 244                         }
 245                 }
 246
 247                 class Derived : Base
 248                 {
 249                         public override string P {
 250                                 get { return null; }
 251                                 set { }
 252                         }
 253                 }
 254
 255                 static void RunTest (Type t, bool use_getter) {
 256                         var p = t.GetProperty ("Item");
 257                         var idx = p.GetIndexParameters ();
 258                         var m_args = t.GetMethod (use_getter ? "get_Item" : "set_Item").GetParameters ();
 259
 260                         Assert.AreEqual (2, idx.Length, "#1");
 261
 262                         Assert.AreEqual (typeof (double), idx [0].ParameterType, "#2");
 263                         Assert.AreEqual (p, idx [0].Member, "#3");
 264                         Assert.AreEqual ("a", idx [0].Name, "#4");
 265                         Assert.AreEqual (0, idx [0].Position, "#5");
 266                         Assert.AreEqual (m_args [0].MetadataToken, idx [0].MetadataToken, "#6");
 267                         Assert.AreEqual (ParameterAttributes.None, idx [0].Attributes, "#7");
 268
 269                         Assert.AreEqual (typeof (string), idx [1].ParameterType, "#8");
 270                         Assert.AreEqual (p, idx [1].Member, "#9");
 271                         Assert.AreEqual ("b", idx [1].Name, "#10");
 272                         Assert.AreEqual (1, idx [1].Position, "#11");
 273                         Assert.AreEqual (m_args [1].MetadataToken, idx [1].MetadataToken, "#12");
 274                         Assert.AreEqual (ParameterAttributes.None, idx [1].Attributes, "#13");
 275
 276                         var idx2 = p.GetIndexParameters ();
 277
 278                         //No interning exposed
 279                         Assert.AreNotSame (idx, idx2, "#14");
 280                         Assert.AreNotSame (idx [0], idx2 [1], "#15");
 281                 }
 282
 283                 [Test]
 284                 public void GetIndexParameterReturnsObjectsBoundToTheProperty ()
 285                 {
 286                         RunTest (typeof (TestA), false);
 287                         RunTest (typeof (TestB), true);
 288                 }
 289
 290                 public class TestA {
 291                         public int this[double a, string b] {
 292                                 set {}
 293                         }
 294                 }
 295
 296                 public class TestB {
 297                         public int this[double a, string b] {
 298                                 get { return 1; }
 299                                 set {}
 300                         }
 301                 }
 302
 303                 [Test]
 304                 public void GetIndexParameterReturnedObjectsCustomAttributes () {
 305                         var pa = typeof (TestC).GetProperty ("Item").GetIndexParameters () [0];
 306                         Assert.IsTrue (pa.IsDefined (typeof (ParamArrayAttribute), false), "#1");
 307
 308                         var pb = typeof (TestD).GetProperty ("Item").GetIndexParameters () [0];
 309                         Assert.IsTrue (pb.IsDefined (typeof (ParamArrayAttribute), false), "#2");
 310
 311                         Assert.AreEqual (1, Attribute.GetCustomAttributes (pa).Length, "#3");
 312                         Assert.AreEqual (1, Attribute.GetCustomAttributes (pb).Length, "#4");
 313
 314                         Assert.AreEqual (0, pa.GetOptionalCustomModifiers ().Length, "#5");
 315                         Assert.AreEqual (0, pb.GetRequiredCustomModifiers ().Length, "#6");
 316                 }
 317
 318                 public class TestC {
 319                         public int this[params double[] a] {
 320                                 get { return 99; }
 321                         }
 322                 }
 323
 324                 public class TestD {
 325                         public int this[params double[] a] {
 326                                 set { }
 327                         }
 328                 }
 329
 330                 static string CreateTempAssembly ()
 331                 {
 332                         FileStream f = null;
 333                         string path;
 334                         Random rnd;
 335                         int num = 0;
 336
 337                         rnd = new Random ();
 338                         do {
 339                                 num = rnd.Next ();
 340                                 num++;
 341                                 path = Path.Combine (Path.GetTempPath (), "tmp" + num.ToString ("x") + ".dll");
 342
 343                                 try {
 344                                         f = new FileStream (path, FileMode.CreateNew);
 345                                 } catch { }
 346                         } while (f == null);
 347
 348                         f.Close ();
 349
 350
 351                         return "tmp" + num.ToString ("x") + ".dll";
 352                 }
 353
 354                 public class TestE {
 355                         public int PropE {
 356                                 get { return 99; }
 357                         }
 358                 }
 359 #if !MONOTOUCH
 360                 [Test]
 361                 public void ConstantValue () {
 362                         /*This test looks scary because we can't generate a default value with C# */
 363                         var assemblyName = new AssemblyName ();
 364                         assemblyName.Name = "MonoTests.System.Reflection.Emit.PropertyInfoTest";
 365                         string an = CreateTempAssembly ();
 366
 367                         var assembly = Thread.GetDomain ().DefineDynamicAssembly (assemblyName, AssemblyBuilderAccess.RunAndSave, Path.GetTempPath ());
 368                         var module = assembly.DefineDynamicModule ("module1", an);
 369
 370                         var tb = module.DefineType ("Test", TypeAttributes.Public);
 371                         var prop = tb.DefineProperty ("Prop", PropertyAttributes.HasDefault, typeof (string), new Type [0]);
 372
 373                         var getter = tb.DefineMethod ("get_Prop", MethodAttributes.Public, typeof (string), new Type [0]);
 374                         var ilgen = getter.GetILGenerator ();
 375                         ilgen.Emit (OpCodes.Ldnull);
 376                         ilgen.Emit (OpCodes.Ret);
 377
 378                         var setter = tb.DefineMethod ("set_Prop", MethodAttributes.Public, null, new Type [1] { typeof (string) });
 379                         setter.GetILGenerator ().Emit (OpCodes.Ret);
 380
 381                         prop.SetConstant ("test");
 382                         prop.SetGetMethod (getter);
 383                         prop.SetSetMethod (setter);
 384
 385                         tb.CreateType ();
 386
 387                         File.Delete (Path.Combine (Path.GetTempPath (), an));
 388                         assembly.Save (an);
 389
 390                         var asm = Assembly.LoadFrom (Path.Combine (Path.GetTempPath (), an));
 391                         var t = asm.GetType ("Test");
 392                         var p = t.GetProperty ("Prop");
 393                         Assert.AreEqual ("test", p.GetConstantValue (), "#1");
 394
 395                         File.Delete (Path.Combine (Path.GetTempPath (), an));
 396
 397                         var pa = typeof (TestE).GetProperty ("PropE");
 398                         try {
 399                                 pa.GetConstantValue ();
 400                                 Assert.Fail ("#2");
 401                         } catch (InvalidOperationException) {
 402                         }
 403                 }
 404 #endif
 405 #if NET_2_0
 406                 public class A<T>
 407                 {
 408                         public string Property {
 409                                 get { return typeof (T).FullName; }
 410                         }
 411                 }
 412
 413                 public int? nullable_field;
 414
 415                 public int? NullableProperty {
 416                         get { return nullable_field; }
 417                         set { nullable_field = value; }
 418                 }
 419
 420                 [Test]
 421                 public void NullableTests ()
 422                 {
 423                         PropertyInfoTest t = new PropertyInfoTest ();
 424
 425                         PropertyInfo pi = typeof(PropertyInfoTest).GetProperty("NullableProperty");
 426
 427                         pi.SetValue (t, 100, null);
 428                         Assert.AreEqual (100, pi.GetValue (t, null));
 429                         pi.SetValue (t, null, null);
 430                         Assert.AreEqual (null, pi.GetValue (t, null));
 431                 }
 432
 433                 [Test]
 434                 public void Bug77160 ()
 435                 {
 436                         object instance = new A<string> ();
 437                         Type type = instance.GetType ();
 438                         PropertyInfo property = type.GetProperty ("Property");
 439                         Assert.AreEqual (typeof (string).FullName, property.GetValue (instance, null));
 440                 }
 441 #endif
 442
 443
 444                 static bool HasAttribute (object [] attrs, Type attributeType)
 445                 {
 446                         foreach (object attr in attrs)
 447                                 if (attr.GetType () == attributeType)
 448                                         return true;
 449                         return false;
 450                 }
 451
 452                 static bool HasMethod (MethodInfo [] methods, string name)
 453                 {
 454                         foreach (MethodInfo method in methods)
 455                                 if (method.Name == name)
 456                                         return true;
 457                         return false;
 458                 }
 459
 460                 private class TestClass
 461                 {
 462                         private AttributeTargets _targets = AttributeTargets.Assembly;
 463
 464                         public AttributeTargets Targets {
 465                                 get { return _targets; }
 466                                 set { _targets = value; }
 467                         }
 468
 469                         public string ReadOnlyProperty {
 470                                 get { return string.Empty; }
 471                         }
 472
 473                         private string Private {
 474                                 get { return null; }
 475                                 set { }
 476                         }
 477
 478 #if NET_2_0
 479                         public string PrivateSetter {
 480                                 get { return null; }
 481                                 private set { }
 482                         }
 483 #endif
 484                 }
 485
 486                 [Test] // bug #633671
 487                 public void DeclaringTypeOfPropertyFromInheritedTypePointsToBase ()
 488                 {
 489                         var inherit1 = typeof(InheritsFromClassWithNullableDateTime);
 490                         var siblingProperty = inherit1.GetProperty("Property1");
 491
 492                         Assert.AreEqual (typeof (ClassWithNullableDateTime), siblingProperty.DeclaringType, "#1");
 493                         Assert.AreEqual (typeof (InheritsFromClassWithNullableDateTime), siblingProperty.ReflectedType, "#2");
 494
 495                         //The check is done twice since the bug is related to getting those 2 properties multiple times.
 496                         Assert.AreEqual (typeof (ClassWithNullableDateTime), siblingProperty.DeclaringType, "#3");
 497                         Assert.AreEqual (typeof (InheritsFromClassWithNullableDateTime), siblingProperty.ReflectedType, "#4");
 498                 }
 499
 500
 501                 public class ClassWithNullableDateTime
 502                 {
 503                         public DateTime? Property1 { get; set; }
 504                 }
 505
 506                 public class InheritsFromClassWithNullableDateTime : ClassWithNullableDateTime
 507                 {
 508                 }
 509
 510                 public static int ThrowingProperty {
 511                         get {
 512                                 throw new ObjectDisposedException("TestClass");
 513                         }
 514                 }
 515
 516                 [Test]
 517                 public void GetException () {
 518                         var prop = typeof(PropertyInfoTest).GetProperty("ThrowingProperty");
 519                         try {
 520                                 prop.GetValue (null, null);
 521                                 Assert.Fail ();
 522                         } catch (TargetInvocationException ex) {
 523                                 Assert.IsTrue (ex.InnerException is ObjectDisposedException);
 524                         }
 525                 }
 526         }
 527 }