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

   1 //
   2 // ExpressionTest_New.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.Reflection;
  31 using System.Linq;
  32 using System.Linq.Expressions;
  33
  34 using NUnit.Framework;
  35
  36 namespace MonoTests.System.Linq.Expressions {
  37
  38         [TestFixture]
  39         public class ExpressionTest_New {
  40
  41                 [Test]
  42                 [ExpectedException (typeof (ArgumentNullException))]
  43                 public void NullType ()
  44                 {
  45                         Expression.New (null as Type);
  46                 }
  47
  48                 [Test]
  49                 [ExpectedException (typeof (ArgumentNullException))]
  50                 public void NullConstructor ()
  51                 {
  52                         Expression.New (null as ConstructorInfo);
  53                 }
  54
  55                 public class Foo {
  56
  57                         public Foo (string s)
  58                         {
  59                         }
  60                 }
  61
  62                 public class Bar {
  63
  64                         public string Value { get; set; }
  65
  66                         public Bar ()
  67                         {
  68                         }
  69                 }
  70
  71                 public struct Baz {
  72                 }
  73
  74                 [Test]
  75                 [ExpectedException (typeof (ArgumentException))]
  76                 public void NoParameterlessConstructor ()
  77                 {
  78                         Expression.New (typeof (Foo));
  79                 }
  80
  81                 [Test]
  82                 [ExpectedException (typeof (ArgumentException))]
  83                 public void ConstructorHasTooMuchParameters ()
  84                 {
  85                         Expression.New (typeof (Foo).GetConstructor (new [] { typeof (string) }));
  86                 }
  87
  88                 [Test]
  89                 [Category ("NotDotNet")]
  90                 [ExpectedException (typeof (ArgumentException))]
  91                 public void NewVoid ()
  92                 {
  93                         Expression.New (typeof (void));
  94                 }
  95
  96                 [Test]
  97                 [ExpectedException (typeof (ArgumentNullException))]
  98                 public void HasNullArgument ()
  99                 {
 100                         Expression.New (typeof (Foo).GetConstructor (new [] { typeof (string) }), null as Expression);
 101                 }
 102
 103                 [Test]
 104                 [ExpectedException (typeof (ArgumentException))]
 105                 public void HasWrongArgument ()
 106                 {
 107                         Expression.New (typeof (Foo).GetConstructor (new [] { typeof (string) }), Expression.Constant (12));
 108                 }
 109
 110                 [Test]
 111                 public void NewFoo ()
 112                 {
 113                         var n = Expression.New (typeof (Foo).GetConstructor (new [] { typeof (string) }), Expression.Constant ("foo"));
 114
 115                         Assert.AreEqual (ExpressionType.New, n.NodeType);
 116                         Assert.AreEqual (typeof (Foo), n.Type);
 117                         Assert.AreEqual (1, n.Arguments.Count);
 118                         Assert.IsNull (n.Members);
 119                         Assert.AreEqual ("new Foo(\"foo\")", n.ToString ());
 120                 }
 121
 122                 [Test]
 123                 public void NewBar ()
 124                 {
 125                         var n = Expression.New (typeof (Bar));
 126
 127                         Assert.IsNotNull (n.Constructor);
 128                         Assert.IsNotNull (n.Arguments);
 129                         Assert.IsNull (n.Members); // wrong doc
 130
 131                         Assert.AreEqual ("new Bar()", n.ToString ());
 132
 133                         n = Expression.New (typeof (Bar).GetConstructor (Type.EmptyTypes));
 134
 135                         Assert.AreEqual ("new Bar()", n.ToString ());
 136                 }
 137
 138                 public class Gazonk {
 139
 140                         string value;
 141
 142                         public Gazonk (string s)
 143                         {
 144                                 value = s;
 145                         }
 146
 147                         public override bool Equals (object obj)
 148                         {
 149                                 var o = obj as Gazonk;
 150                                 if (o == null)
 151                                         return false;
 152
 153                                 return value == o.value;
 154                         }
 155
 156                         public override int GetHashCode ()
 157                         {
 158                                 return value.GetHashCode ();
 159                         }
 160                 }
 161
 162                 [Test]
 163                 public void CompileNewClass ()
 164                 {
 165                         var p = Expression.Parameter (typeof (string), "p");
 166                         var n = Expression.New (typeof (Gazonk).GetConstructor (new [] { typeof (string) }), p);
 167                         var fgaz = Expression.Lambda<Func<string, Gazonk>> (n, p).Compile ();
 168
 169                         var g1 = new Gazonk ("foo");
 170                         var g2 = new Gazonk ("bar");
 171
 172                         Assert.IsNotNull (g1);
 173                         Assert.AreEqual (g1, fgaz ("foo"));
 174                         Assert.IsNotNull (g2);
 175                         Assert.AreEqual (g2, fgaz ("bar"));
 176
 177                         n = Expression.New (typeof (Bar));
 178                         var lbar = Expression.Lambda<Func<Bar>> (n).Compile ();
 179
 180                         var bar = lbar ();
 181
 182                         Assert.IsNotNull (bar);
 183                         Assert.IsNull (bar.Value);
 184                 }
 185
 186                 public class FakeAnonymousType {
 187
 188                         public string Foo { get; set; }
 189                         public string Bar { get; set; }
 190                         public string Baz { get; set; }
 191                         public int Gazonk { get; set; }
 192                         public string Tzap { set {} }
 193
 194                         public FakeAnonymousType (string foo)
 195                         {
 196                                 Foo = foo;
 197                         }
 198
 199                         public FakeAnonymousType (string foo, string bar, string baz)
 200                         {
 201                                 Foo = foo;
 202                                 Bar = bar;
 203                                 Baz = baz;
 204                         }
 205                 }
 206
 207                 [Test]
 208                 public void NewFakeAnonymousType ()
 209                 {
 210                         var n = Expression.New (
 211                                 typeof (FakeAnonymousType).GetConstructor (new [] { typeof (string), typeof (string), typeof (string) } ),
 212                                 new [] { "Foo".ToConstant (), "Bar".ToConstant (), "Baz".ToConstant () },
 213                                 new [] { typeof (FakeAnonymousType).GetProperty ("Foo"), typeof (FakeAnonymousType).GetProperty ("Bar"), typeof (FakeAnonymousType).GetProperty ("Baz") });
 214
 215                         Assert.IsNotNull (n.Constructor);
 216                         Assert.IsNotNull (n.Arguments);
 217                         Assert.IsNotNull (n.Members);
 218                         Assert.AreEqual ("new FakeAnonymousType(Foo = \"Foo\", Bar = \"Bar\", Baz = \"Baz\")", n.ToString ());
 219                 }
 220
 221                 [Test]
 222                 [ExpectedException (typeof (ArgumentNullException))]
 223                 public void NullMember ()
 224                 {
 225                         Expression.New (
 226                                 typeof (FakeAnonymousType).GetConstructor (new [] { typeof (string) }),
 227                                 new [] { "Foo".ToConstant () },
 228                                 new MemberInfo [] { null });
 229                 }
 230
 231                 [Test]
 232                 [ExpectedException (typeof (ArgumentException))]
 233                 public void MemberArgumentMiscount ()
 234                 {
 235                         Expression.New (
 236                                 typeof (FakeAnonymousType).GetConstructor (new [] { typeof (string) }),
 237                                 new [] { "Foo".ToConstant () },
 238                                 new [] { typeof (FakeAnonymousType).GetProperty ("Foo"), typeof (FakeAnonymousType).GetProperty ("Bar") });
 239                 }
 240
 241                 [Test]
 242                 [ExpectedException (typeof (ArgumentException))]
 243                 public void MemberArgumentMismatch ()
 244                 {
 245                         Expression.New (
 246                                 typeof (FakeAnonymousType).GetConstructor (new [] { typeof (string) }),
 247                                 new [] { "Foo".ToConstant () },
 248                                 new [] { typeof (FakeAnonymousType).GetProperty ("Gazonk") });
 249                 }
 250
 251                 [Test]
 252                 [ExpectedException (typeof (ArgumentException))]
 253                 public void MemberHasNoGetter ()
 254                 {
 255                         Expression.New (
 256                                 typeof (FakeAnonymousType).GetConstructor (new [] { typeof (string) }),
 257                                 new [] { "Foo".ToConstant () },
 258                                 new [] { typeof (FakeAnonymousType).GetProperty ("Tzap") });
 259                 }
 260
 261                 public struct EineStrukt {
 262                         public int left;
 263                         public int right;
 264
 265                         public EineStrukt (int left, int right)
 266                         {
 267                                 this.left = left;
 268                                 this.right = right;
 269                         }
 270                 }
 271
 272                 [Test]
 273                 public void CompileNewStruct ()
 274                 {
 275                         var create = Expression.Lambda<Func<EineStrukt>> (
 276                                 Expression.New (typeof (EineStrukt))).Compile ();
 277
 278                         var s = create ();
 279                         Assert.AreEqual (0, s.left);
 280                         Assert.AreEqual (0, s.right);
 281                 }
 282
 283                 [Test]
 284                 public void CompileNewStructWithParameters ()
 285                 {
 286                         var pl = Expression.Parameter (typeof (int), "left");
 287                         var pr = Expression.Parameter (typeof (int), "right");
 288
 289                         var create = Expression.Lambda<Func<int, int, EineStrukt>> (
 290                                 Expression.New (typeof (EineStrukt).GetConstructor (new [] { typeof (int), typeof (int) }), pl, pr), pl, pr).Compile ();
 291
 292                         var s = create (42, 12);
 293
 294                         Assert.AreEqual (42, s.left);
 295                         Assert.AreEqual (12, s.right);
 296                 }
 297
 298                 public class EineKlass {
 299
 300                         public string Left { get; set; }
 301                         public string Right { get; set; }
 302
 303                         public EineKlass ()
 304                         {
 305                         }
 306
 307                         public EineKlass (string l, string r)
 308                         {
 309                                 Left = l;
 310                                 Right = r;
 311                         }
 312                 }
 313
 314                 [Test]
 315                 public void CompileNewClassEmptyConstructor ()
 316                 {
 317                         var create = Expression.Lambda<Func<EineKlass>> (
 318                                 Expression.New (typeof (EineKlass))).Compile ();
 319
 320                         var k = create ();
 321                         Assert.IsNull (k.Left);
 322                         Assert.IsNull (k.Right);
 323                 }
 324
 325                 [Test]
 326                 public void CompileNewClassWithParameters ()
 327                 {
 328                         var pl = Expression.Parameter (typeof (string), "left");
 329                         var pr = Expression.Parameter (typeof (string), "right");
 330
 331                         var create = Expression.Lambda<Func<string, string, EineKlass>> (
 332                                 Expression.New (typeof (EineKlass).GetConstructor (new [] { typeof (string), typeof (string) }), pl, pr), pl, pr).Compile ();
 333
 334                         var k = create ("foo", "bar");
 335
 336                         Assert.AreEqual ("foo", k.Left);
 337                         Assert.AreEqual ("bar", k.Right);
 338                 }
 339         }
 340 }