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

   1 //
   2 // System.Reflection.ConstructorInfo Test Cases
   3 //
   4 // Authors:
   5 //  Gert Driesen (drieseng@users.sourceforge.net)
   6 //
   7 // (c) 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 using System;
  30 using System.Reflection;
  31 using System.Runtime.Serialization;
  32
  33 using NUnit.Framework;
  34
  35 namespace MonoTests.System.Reflection
  36 {
  37         [TestFixture]
  38         public class ConstructorInfoTest
  39         {
  40                 [Test]
  41                 public void Invoke ()
  42                 {
  43                         ConstructorInfo ctor = typeof (Foo).GetConstructor (
  44                                 BindingFlags.Public | BindingFlags.Instance, null,
  45                                 Type.EmptyTypes, null);
  46                         Foo foo = ctor.Invoke (new object [0]) as Foo;
  47                         Assert.IsNotNull (foo, "#1");
  48                 }
  49
  50                 [Test]
  51                 public void InvokeAbstract ()
  52                 {
  53                         object obj = FormatterServices.GetUninitializedObject (typeof (Foo));
  54                         ConstructorInfo ctor = typeof (AbstractFoo).GetConstructor (
  55                                 BindingFlags.Instance | BindingFlags.NonPublic, null,
  56                                 Type.EmptyTypes, null);
  57                         Assert.IsNotNull (ctor, "#A1");
  58                         object ret = ctor.Invoke (obj, new object [0]);
  59                         Assert.IsNull (ret, "#A2");
  60
  61                         try {
  62                                 ctor.Invoke (null, new object [0]);
  63                                 Assert.Fail ("#B1");
  64                         } catch (TargetException ex) {
  65                                 // Non-static method requires a target
  66                                 Assert.AreEqual (typeof (TargetException), ex.GetType (), "#B2");
  67                                 Assert.IsNull (ex.InnerException, "#B3");
  68                                 Assert.IsNotNull (ex.Message, "#B4");
  69                         }
  70
  71                         try {
  72                                 ctor.Invoke (new object [0]);
  73                                 Assert.Fail ("#C1");
  74                         } catch (MemberAccessException ex) {
  75                                 // Cannot create an abstract class
  76                                 Assert.AreEqual (typeof (MemberAccessException), ex.GetType (), "#C2");
  77                                 Assert.IsNull (ex.InnerException, "#C3");
  78                                 Assert.IsNotNull (ex.Message, "#C4");
  79                         }
  80                 }
  81
  82                 [Test]
  83                 public void InvokeOptionalArguments ()
  84                 {
  85                         var constructor = typeof (Optional).GetConstructors () [0];
  86                         try {
  87                                 constructor.Invoke (BindingFlags.Default, null, null, null);
  88                                 Assert.Fail ("#1");
  89                         } catch (TargetParameterCountException) {
  90                         }
  91
  92                         object[] parameters = new [] { Type.Missing, Type.Missing, Type.Missing };
  93                         var instance = constructor.Invoke (BindingFlags.InvokeMethod | BindingFlags.CreateInstance, null, parameters, null);
  94                         Assert.IsNotNull (instance, "#2a");
  95                 }
  96
  97                 abstract class AbstractFoo
  98                 {
  99                 }
 100
 101                 class Foo : AbstractFoo
 102                 {
 103                 }
 104
 105                 [Test]
 106                 [ExpectedException (typeof (MemberAccessException))]
 107                 public void InvokeOpenGenericType () {
 108                         typeof (Gen<>).GetConstructor (Type.EmptyTypes).Invoke (null);
 109                 }
 110
 111                 public class Gen<T> {
 112                         public Gen() {
 113                         }
 114                 }
 115
 116                 class Optional
 117                 {
 118                         public Optional (string caption = null, string value = null, string layoutName = null)
 119                         {
 120                         }
 121                 }
 122
 123                 [Test]
 124                 [ExpectedException (typeof (TargetException))]
 125                 public void InvokeWithNullTarget ()
 126                 {
 127                         typeof (Foo).GetConstructors ()[0].Invoke (null, BindingFlags.Default, null, null, null);
 128                 }
 129
 130                 [Test]
 131                 [ExpectedException (typeof (TargetException))]
 132                 public void InvokeWithWrongTarget ()
 133                 {
 134                         typeof (Foo).GetConstructors ()[0].Invoke (new object (), BindingFlags.Default, null, null, null);
 135                 }
 136
 137                 [Test]
 138                 public void ContainsGenericParametersOnGenericType ()
 139                 {
 140                         var ctor = typeof (Gen<>).GetConstructor (Type.EmptyTypes);
 141                         Assert.IsTrue (ctor.ContainsGenericParameters);
 142                 }
 143         }
 144 }