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

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