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

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  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 //              Jb Evain <jbevain@novell.com>
  22
  23 using System;
  24 using System.Reflection;
  25 using System.Linq;
  26 using System.Linq.Expressions;
  27 using NUnit.Framework;
  28
  29 namespace MonoTests.System.Linq.Expressions
  30 {
  31         [TestFixture]
  32         public class ExpressionTest_OrElse
  33         {
  34                 [Test]
  35                 [ExpectedException (typeof (ArgumentNullException))]
  36                 public void Arg1Null ()
  37                 {
  38                         Expression.OrElse (null, Expression.Constant (1));
  39                 }
  40
  41                 [Test]
  42                 [ExpectedException (typeof (ArgumentNullException))]
  43                 public void Arg2Null ()
  44                 {
  45                         Expression.OrElse (Expression.Constant (1), null);
  46                 }
  47
  48                 [Test]
  49                 [ExpectedException (typeof (InvalidOperationException))]
  50                 public void NoOperatorClass ()
  51                 {
  52                         Expression.OrElse (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
  53                 }
  54
  55                 [Test]
  56                 [ExpectedException (typeof (InvalidOperationException))]
  57                 public void Double ()
  58                 {
  59                         Expression.OrElse (Expression.Constant (1.0), Expression.Constant (2.0));
  60                 }
  61
  62                 [Test]
  63                 [ExpectedException (typeof (InvalidOperationException))]
  64                 public void Integer ()
  65                 {
  66                         Expression.OrElse (Expression.Constant (1), Expression.Constant (2));
  67                 }
  68
  69                 [Test]
  70                 [ExpectedException (typeof (InvalidOperationException))]
  71                 public void MismatchedTypes ()
  72                 {
  73                         Expression.OrElse (Expression.Constant (new OpClass ()), Expression.Constant (true));
  74                 }
  75
  76                 [Test]
  77                 public void Boolean ()
  78                 {
  79                         BinaryExpression expr = Expression.OrElse (Expression.Constant (true), Expression.Constant (false));
  80                         Assert.AreEqual (ExpressionType.OrElse, expr.NodeType, "OrElse#01");
  81                         Assert.AreEqual (typeof (bool), expr.Type, "OrElse#02");
  82                         Assert.IsNull (expr.Method, "OrElse#03");
  83 #if !NET_4_0
  84                         Assert.AreEqual ("(True || False)", expr.ToString(), "OrElse#04");
  85 #endif
  86                 }
  87
  88                 [Test]
  89                 public void UserDefinedClass ()
  90                 {
  91                         // We can use the simplest version of GetMethod because we already know only one
  92                         // exists in the very simple class we're using for the tests.
  93                         MethodInfo mi = typeof (OpClass).GetMethod ("op_BitwiseOr");
  94
  95                         BinaryExpression expr = Expression.OrElse (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
  96                         Assert.AreEqual (ExpressionType.OrElse, expr.NodeType, "OrElse#05");
  97                         Assert.AreEqual (typeof (OpClass), expr.Type, "OrElse#06");
  98                         Assert.AreEqual (mi, expr.Method, "OrElse#07");
  99                         Assert.AreEqual ("op_BitwiseOr", expr.Method.Name, "OrElse#08");
 100 #if !NET_4_0
 101                         Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) || value(MonoTests.System.Linq.Expressions.OpClass))",
 102                                 expr.ToString(), "OrElse#09");
 103 #endif
 104                 }
 105
 106                 public class BrokenMethod {
 107                         public static int operator | (BrokenMethod a, BrokenMethod b)
 108                         {
 109                                 return 1;
 110                         }
 111                 }
 112
 113                 public class BrokenMethod2 {
 114                         public static BrokenMethod2 operator | (BrokenMethod2 a, int b)
 115                         {
 116                                 return null;
 117                         }
 118                 }
 119
 120                 [Test]
 121                 [ExpectedException(typeof(ArgumentException))]
 122                 public void MethodInfoReturnType ()
 123                 {
 124                         Expression.OrElse (Expression.Constant (new BrokenMethod ()),
 125                                            Expression.Constant (new BrokenMethod ()));
 126                 }
 127
 128                 [Test]
 129                 [ExpectedException(typeof(ArgumentException))]
 130                 public void MethodInfoReturnType2 ()
 131                 {
 132                         Expression.OrElse (Expression.Constant (new BrokenMethod2 ()),
 133                                            Expression.Constant (1));
 134                 }
 135
 136                 [Test]
 137                 public void OrElseNotLifted ()
 138                 {
 139                         var b = Expression.OrElse (
 140                                 Expression.Constant (true, typeof (bool)),
 141                                 Expression.Constant (true, typeof (bool)));
 142
 143                         Assert.AreEqual (typeof (bool), b.Type);
 144                         Assert.IsFalse (b.IsLifted);
 145                         Assert.IsFalse (b.IsLiftedToNull);
 146                 }
 147
 148                 [Test]
 149                 public void OrElseTest ()
 150                 {
 151                         var a = Expression.Parameter (typeof (bool), "a");
 152                         var b = Expression.Parameter (typeof (bool), "b");
 153                         var l = Expression.Lambda<Func<bool, bool, bool>> (
 154                                 Expression.OrElse (a, b), a, b);
 155
 156                         var be = l.Body as BinaryExpression;
 157                         Assert.IsNotNull (be);
 158                         Assert.AreEqual (typeof (bool), be.Type);
 159                         Assert.IsFalse (be.IsLifted);
 160                         Assert.IsFalse (be.IsLiftedToNull);
 161
 162                         var c = l.Compile ();
 163
 164                         Assert.AreEqual (true,  c (true, true), "o1");
 165                         Assert.AreEqual (true,  c (true, false), "o2");
 166                         Assert.AreEqual (true,  c (false, true), "o3");
 167                         Assert.AreEqual (false, c (false, false), "o4");
 168                 }
 169
 170                 [Test]
 171                 public void OrElseLifted ()
 172                 {
 173                         var b = Expression.OrElse (
 174                                 Expression.Constant (null, typeof (bool?)),
 175                                 Expression.Constant (null, typeof (bool?)));
 176
 177                         Assert.AreEqual (typeof (bool?), b.Type);
 178                         Assert.IsTrue (b.IsLifted);
 179                         Assert.IsTrue (b.IsLiftedToNull);
 180                 }
 181
 182                 [Test]
 183                 public void OrElseTestNullable ()
 184                 {
 185                         var a = Expression.Parameter (typeof (bool?), "a");
 186                         var b = Expression.Parameter (typeof (bool?), "b");
 187                         var l = Expression.Lambda<Func<bool?, bool?, bool?>> (
 188                                 Expression.OrElse (a, b), a, b);
 189
 190                         var be = l.Body as BinaryExpression;
 191                         Assert.IsNotNull (be);
 192                         Assert.AreEqual (typeof (bool?), be.Type);
 193                         Assert.IsTrue (be.IsLifted);
 194                         Assert.IsTrue (be.IsLiftedToNull);
 195
 196                         var c = l.Compile ();
 197
 198                         Assert.AreEqual (true,  c (true, true),   "o1");
 199                         Assert.AreEqual (true,  c (true, false),  "o2");
 200                         Assert.AreEqual (true,  c (false, true),  "o3");
 201                         Assert.AreEqual (false, c (false, false), "o4");
 202
 203                         Assert.AreEqual (true, c (true, null),  "o5");
 204                         Assert.AreEqual (null, c (false, null), "o6");
 205                         Assert.AreEqual (null, c (null, false), "o7");
 206                         Assert.AreEqual (true, c (true, null),  "o8");
 207                         Assert.AreEqual (null, c (null, null),  "o9");
 208                 }
 209
 210                 [Test]
 211                 public void OrElseBoolItem ()
 212                 {
 213                         var i = Expression.Parameter (typeof (Item<bool>), "i");
 214                         var and = Expression.Lambda<Func<Item<bool>, bool>> (
 215                                 Expression.OrElse (
 216                                         Expression.Property (i, "Left"),
 217                                         Expression.Property (i, "Right")), i).Compile ();
 218
 219                         var item = new Item<bool> (true, false);
 220                         Assert.AreEqual (true, and (item));
 221                         Assert.IsTrue (item.LeftCalled);
 222                         Assert.IsFalse (item.RightCalled);
 223                 }
 224
 225                 [Test]
 226                 public void OrElseNullableBoolItem ()
 227                 {
 228                         var i = Expression.Parameter (typeof (Item<bool?>), "i");
 229                         var and = Expression.Lambda<Func<Item<bool?>, bool?>> (
 230                                 Expression.OrElse (
 231                                         Expression.Property (i, "Left"),
 232                                         Expression.Property (i, "Right")), i).Compile ();
 233
 234                         var item = new Item<bool?> (true, false);
 235                         Assert.AreEqual ((bool?) true, and (item));
 236                         Assert.IsTrue (item.LeftCalled);
 237                         Assert.IsFalse (item.RightCalled);
 238                 }
 239
 240                 struct Slot {
 241
 242                         public int Value;
 243
 244                         public Slot (int val)
 245                         {
 246                                 this.Value = val;
 247                         }
 248
 249                         public static Slot operator | (Slot a, Slot b)
 250                         {
 251                                 return new Slot (a.Value | b.Value);
 252                         }
 253
 254                         public static bool operator true (Slot a)
 255                         {
 256                                 return a.Value != 0;
 257                         }
 258
 259                         public static bool operator false (Slot a)
 260                         {
 261                                 return a.Value == 0;
 262                         }
 263                 }
 264
 265                 [Test]
 266                 public void UserDefinedOrElse ()
 267                 {
 268                         var l = Expression.Parameter (typeof (Slot), "l");
 269                         var r = Expression.Parameter (typeof (Slot), "r");
 270
 271                         var method = typeof (Slot).GetMethod ("op_BitwiseOr");
 272
 273                         var node = Expression.OrElse (l, r, method);
 274                         Assert.IsFalse (node.IsLifted);
 275                         Assert.IsFalse (node.IsLiftedToNull);
 276                         Assert.AreEqual (method, node.Method);
 277
 278                         var orelse = Expression.Lambda<Func<Slot, Slot, Slot>> (node, l, r).Compile ();
 279
 280                         Assert.AreEqual (new Slot (64), orelse (new Slot (64), new Slot (64)));
 281                         Assert.AreEqual (new Slot (32), orelse (new Slot (32), new Slot (64)));
 282                 }
 283 #if !NET_4_0 // dlr bug 5867
 284                 [Test]
 285                 public void UserDefinedOrElseLiftedToNull ()
 286                 {
 287                         var l = Expression.Parameter (typeof (Slot?), "l");
 288                         var r = Expression.Parameter (typeof (Slot?), "r");
 289
 290                         var method = typeof (Slot).GetMethod ("op_BitwiseOr");
 291
 292                         var node = Expression.OrElse (l, r, method);
 293                         Assert.IsTrue (node.IsLifted);
 294                         Assert.IsTrue (node.IsLiftedToNull);
 295                         Assert.AreEqual (method, node.Method);
 296
 297                         var orelse = Expression.Lambda<Func<Slot?, Slot?, Slot?>> (node, l, r).Compile ();
 298
 299                         Assert.AreEqual (new Slot (64), orelse (new Slot (64), new Slot (64)));
 300                         Assert.AreEqual (new Slot (32), orelse (new Slot (32), new Slot (64)));
 301                         Assert.AreEqual (new Slot (64), orelse (null, new Slot (64)));
 302                         Assert.AreEqual (new Slot (32), orelse (new Slot (32), null));
 303                         Assert.AreEqual (null, orelse (null, null));
 304                 }
 305 #endif
 306                 [Test]
 307                 public void UserDefinedOrElseShortCircuit ()
 308                 {
 309                         var i = Expression.Parameter (typeof (Item<Slot>), "i");
 310                         var orelse = Expression.Lambda<Func<Item<Slot>, Slot>> (
 311                                 Expression.OrElse (
 312                                         Expression.Property (i, "Left"),
 313                                         Expression.Property (i, "Right")), i).Compile ();
 314
 315                         var item = new Item<Slot> (new Slot (1), new Slot (0));
 316                         Assert.AreEqual (new Slot (1), orelse (item));
 317                         Assert.IsTrue (item.LeftCalled);
 318                         Assert.IsFalse (item.RightCalled);
 319                 }
 320
 321                 [Test]
 322                 [Category ("NotDotNet")] // https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=350228
 323                 public void UserDefinedLiftedOrElseShortCircuit ()
 324                 {
 325                         var i = Expression.Parameter (typeof (Item<Slot?>), "i");
 326                         var orelse = Expression.Lambda<Func<Item<Slot?>, Slot?>> (
 327                                 Expression.OrElse (
 328                                         Expression.Property (i, "Left"),
 329                                         Expression.Property (i, "Right")), i).Compile ();
 330
 331                         var item = new Item<Slot?> (new Slot (1), null);
 332                         Assert.AreEqual ((Slot?) new Slot (1), orelse (item));
 333                         Assert.IsTrue (item.LeftCalled);
 334                         Assert.IsFalse (item.RightCalled);
 335                 }
 336
 337                 struct Incomplete {
 338                         public int Value;
 339
 340                         public Incomplete (int val)
 341                         {
 342                                 Value = val;
 343                         }
 344
 345                         public static Incomplete operator | (Incomplete a, Incomplete b)
 346                         {
 347                                 return new Incomplete (a.Value | b.Value);
 348                         }
 349                 }
 350
 351                 [Test]
 352                 [ExpectedException (typeof (ArgumentException))]
 353                 public void IncompleteUserDefinedOrElse ()
 354                 {
 355                         var l = Expression.Parameter (typeof (Incomplete), "l");
 356                         var r = Expression.Parameter (typeof (Incomplete), "r");
 357
 358                         var method = typeof (Incomplete).GetMethod ("op_BitwiseOr");
 359
 360                         Expression.OrElse (l, r, method);
 361                 }
 362         }
 363 }