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

   1 //
   2 // ExpressionTest_LessThanOrEqual.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 using NUnit.Framework;
  34
  35 namespace MonoTests.System.Linq.Expressions
  36 {
  37         [TestFixture]
  38         public class ExpressionTest_LessThanOrEqual
  39         {
  40                 [Test]
  41                 [ExpectedException (typeof (ArgumentNullException))]
  42                 public void Arg1Null ()
  43                 {
  44                         Expression.LessThanOrEqual (null, Expression.Constant (1));
  45                 }
  46
  47                 [Test]
  48                 [ExpectedException (typeof (ArgumentNullException))]
  49                 public void Arg2Null ()
  50                 {
  51                         Expression.LessThanOrEqual (Expression.Constant (1), null);
  52                 }
  53
  54                 [Test]
  55                 [ExpectedException (typeof (InvalidOperationException))]
  56                 public void NoOperatorClass ()
  57                 {
  58                         Expression.LessThanOrEqual (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
  59                 }
  60
  61                 [Test]
  62                 public void Double ()
  63                 {
  64                         var expr = Expression.LessThanOrEqual (Expression.Constant (2.0), Expression.Constant (1.0));
  65                         Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
  66                         Assert.AreEqual (typeof (bool), expr.Type);
  67                         Assert.IsNull (expr.Method);
  68                         Assert.AreEqual ("(2 <= 1)", expr.ToString ());
  69                 }
  70
  71                 [Test]
  72                 public void Integer ()
  73                 {
  74                         var expr = Expression.LessThanOrEqual (Expression.Constant (2), Expression.Constant (1));
  75                         Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
  76                         Assert.AreEqual (typeof (bool), expr.Type);
  77                         Assert.IsNull (expr.Method);
  78                         Assert.AreEqual ("(2 <= 1)", expr.ToString ());
  79                 }
  80
  81                 [Test]
  82                 [ExpectedException (typeof (InvalidOperationException))]
  83                 public void MismatchedTypes ()
  84                 {
  85                         Expression.LessThanOrEqual (Expression.Constant (new OpClass ()), Expression.Constant (true));
  86                 }
  87
  88                 [Test]
  89                 [ExpectedException (typeof (InvalidOperationException))]
  90                 public void Boolean ()
  91                 {
  92                         Expression.LessThanOrEqual (Expression.Constant (true), Expression.Constant (false));
  93                 }
  94
  95                 [Test]
  96                 public void UserDefinedClass ()
  97                 {
  98                         MethodInfo mi = typeof (OpClass).GetMethod ("op_LessThanOrEqual");
  99
 100                         Assert.IsNotNull (mi);
 101
 102                         BinaryExpression expr = Expression.LessThanOrEqual (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
 103                         Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
 104                         Assert.AreEqual (typeof (bool), expr.Type);
 105                         Assert.AreEqual (mi, expr.Method);
 106                         Assert.AreEqual ("op_LessThanOrEqual", expr.Method.Name);
 107                         Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) <= value(MonoTests.System.Linq.Expressions.OpClass))", expr.ToString ());
 108                 }
 109
 110                 [Test]
 111                 public void NullableInt32LessThanOrEqual ()
 112                 {
 113                         var l = Expression.Parameter (typeof (int?), "l");
 114                         var r = Expression.Parameter (typeof (int?), "r");
 115
 116                         var lte = Expression.Lambda<Func<int?, int?, bool>> (
 117                                 Expression.LessThanOrEqual (l, r), l, r).Compile ();
 118
 119                         Assert.IsFalse (lte (null, null));
 120                         Assert.IsFalse (lte (null, 1));
 121                         Assert.IsFalse (lte (null, -1));
 122                         Assert.IsFalse (lte (1, null));
 123                         Assert.IsFalse (lte (-1, null));
 124                         Assert.IsTrue (lte (1, 2));
 125                         Assert.IsFalse (lte (2, 1));
 126                         Assert.IsTrue (lte (1, 1));
 127                 }
 128
 129                 [Test]
 130                 public void NullableInt32LessThanOrEqualLiftedToNull ()
 131                 {
 132                         var l = Expression.Parameter (typeof (int?), "l");
 133                         var r = Expression.Parameter (typeof (int?), "r");
 134
 135                         var lte = Expression.Lambda<Func<int?, int?, bool?>> (
 136                                 Expression.LessThanOrEqual (l, r, true, null), l, r).Compile ();
 137
 138                         Assert.AreEqual ((bool?) null, lte (null, null));
 139                         Assert.AreEqual ((bool?) null, lte (null, 1));
 140                         Assert.AreEqual ((bool?) null, lte (null, -1));
 141                         Assert.AreEqual ((bool?) null, lte (1, null));
 142                         Assert.AreEqual ((bool?) null, lte (-1, null));
 143                         Assert.AreEqual ((bool?) true, lte (1, 2));
 144                         Assert.AreEqual ((bool?) false, lte (2, 1));
 145                         Assert.AreEqual ((bool?) true, lte (1, 1));
 146                 }
 147
 148                 struct Slot {
 149                         public int Value;
 150
 151                         public Slot (int val)
 152                         {
 153                                 Value = val;
 154                         }
 155
 156                         public static bool operator >= (Slot a, Slot b)
 157                         {
 158                                 return a.Value >= b.Value;
 159                         }
 160
 161                         public static bool operator <= (Slot a, Slot b)
 162                         {
 163                                 return a.Value <= b.Value;
 164                         }
 165                 }
 166
 167                 [Test]
 168                 public void UserDefinedLessThanOrEqualLifted ()
 169                 {
 170                         var l = Expression.Parameter (typeof (Slot?), "l");
 171                         var r = Expression.Parameter (typeof (Slot?), "r");
 172
 173                         var node = Expression.LessThanOrEqual (l, r);
 174                         Assert.IsTrue (node.IsLifted);
 175                         Assert.IsFalse (node.IsLiftedToNull);
 176                         Assert.AreEqual (typeof (bool), node.Type);
 177                         Assert.IsNotNull (node.Method);
 178
 179                         var lte = Expression.Lambda<Func<Slot?, Slot?, bool>> (node, l, r).Compile ();
 180
 181                         Assert.AreEqual (false, lte (new Slot (1), new Slot (0)));
 182                         Assert.AreEqual (true, lte (new Slot (-1), new Slot (1)));
 183                         Assert.AreEqual (true, lte (new Slot (1), new Slot (1)));
 184                         Assert.AreEqual (false, lte (null, new Slot (1)));
 185                         Assert.AreEqual (false, lte (new Slot (1), null));
 186                         Assert.AreEqual (false, lte (null, null));
 187                 }
 188
 189                 [Test]
 190                 public void UserDefinedLessThanOrEqualLiftedToNull ()
 191                 {
 192                         var l = Expression.Parameter (typeof (Slot?), "l");
 193                         var r = Expression.Parameter (typeof (Slot?), "r");
 194
 195                         var node = Expression.LessThanOrEqual (l, r, true, null);
 196                         Assert.IsTrue (node.IsLifted);
 197                         Assert.IsTrue (node.IsLiftedToNull);
 198                         Assert.AreEqual (typeof (bool?), node.Type);
 199                         Assert.IsNotNull (node.Method);
 200
 201                         var lte = Expression.Lambda<Func<Slot?, Slot?, bool?>> (node, l, r).Compile ();
 202
 203                         Assert.AreEqual (false, lte (new Slot (1), new Slot (0)));
 204                         Assert.AreEqual (true, lte (new Slot (-1), new Slot (1)));
 205                         Assert.AreEqual (true, lte (new Slot (1), new Slot (1)));
 206                         Assert.AreEqual (null, lte (null, new Slot (1)));
 207                         Assert.AreEqual (null, lte (new Slot (1), null));
 208                         Assert.AreEqual (null, lte (null, null));
 209                 }
 210         }
 211 }