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