mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest_Multiply.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
  22 using System;
  23 using System.Reflection;
  24 using System.Linq;
  25 using System.Linq.Expressions;
  26 using NUnit.Framework;
  27
  28 namespace MonoTests.System.Linq.Expressions
  29 {
  30         [TestFixture]
  31         public class ExpressionTest_Multiply
  32         {
  33                 [Test]
  34                 [ExpectedException (typeof (ArgumentNullException))]
  35                 public void Arg1Null ()
  36                 {
  37                         Expression.Multiply (null, Expression.Constant (1));
  38                 }
  39
  40                 [Test]
  41                 [ExpectedException (typeof (ArgumentNullException))]
  42                 public void Arg2Null ()
  43                 {
  44                         Expression.Multiply (Expression.Constant (1), null);
  45                 }
  46
  47                 [Test]
  48                 [ExpectedException (typeof (InvalidOperationException))]
  49                 public void ArgTypesDifferent ()
  50                 {
  51                         Expression.Multiply (Expression.Constant (1), Expression.Constant (2.0));
  52                 }
  53
  54                 [Test]
  55                 [ExpectedException (typeof (InvalidOperationException))]
  56                 public void NoOperatorClass ()
  57                 {
  58                         Expression.Multiply (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
  59                 }
  60
  61                 [Test]
  62                 [ExpectedException (typeof (InvalidOperationException))]
  63                 public void Boolean ()
  64                 {
  65                         Expression.Multiply (Expression.Constant (true), Expression.Constant (false));
  66                 }
  67
  68                 [Test]
  69                 public void Numeric ()
  70                 {
  71                         BinaryExpression expr = Expression.Multiply (Expression.Constant (1), Expression.Constant (2));
  72                         Assert.AreEqual (ExpressionType.Multiply, expr.NodeType, "Multiply#01");
  73                         Assert.AreEqual (typeof (int), expr.Type, "Multiply#02");
  74                         Assert.IsNull (expr.Method, "Multiply#03");
  75                         Assert.AreEqual ("(1 * 2)", expr.ToString(), "Multiply#04");
  76                 }
  77
  78                 [Test]
  79                 public void Nullable ()
  80                 {
  81                         int? a = 1;
  82                         int? b = 2;
  83
  84                         BinaryExpression expr = Expression.Multiply (Expression.Constant (a), Expression.Constant (b));
  85                         Assert.AreEqual (ExpressionType.Multiply, expr.NodeType, "Multiply#05");
  86                         Assert.AreEqual (typeof (int), expr.Type, "Multiply#06");
  87                         Assert.IsNull (expr.Method, "Multiply#07");
  88                         Assert.AreEqual ("(1 * 2)", expr.ToString(), "Multiply#08");
  89                 }
  90
  91                 [Test]
  92                 public void UserDefinedClass ()
  93                 {
  94                         // We can use the simplest version of GetMethod because we already know only one
  95                         // exists in the very simple class we're using for the tests.
  96                         MethodInfo mi = typeof (OpClass).GetMethod ("op_Multiply");
  97
  98                         BinaryExpression expr = Expression.Multiply (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
  99                         Assert.AreEqual (ExpressionType.Multiply, expr.NodeType, "Multiply#09");
 100                         Assert.AreEqual (typeof (OpClass), expr.Type, "Multiply#10");
 101                         Assert.AreEqual (mi, expr.Method, "Multiply#11");
 102                         Assert.AreEqual ("op_Multiply", expr.Method.Name, "Multiply#12");
 103                         Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) * value(MonoTests.System.Linq.Expressions.OpClass))",
 104                                 expr.ToString(), "Multiply#13");
 105                 }
 106
 107                 [Test]
 108                 public void Compile ()
 109                 {
 110                         var left = Expression.Parameter (typeof (int), "l");
 111                         var right = Expression.Parameter (typeof (int), "r");
 112                         var l = Expression.Lambda<Func<int, int, int>> (
 113                                 Expression.Multiply (left, right), left, right);
 114
 115                         var be = l.Body as BinaryExpression;
 116                         Assert.IsNotNull (be);
 117                         Assert.AreEqual (typeof (int), be.Type);
 118                         Assert.IsFalse (be.IsLifted);
 119                         Assert.IsFalse (be.IsLiftedToNull);
 120
 121                         var c = l.Compile ();
 122
 123                         Assert.AreEqual (36, c (6, 6));
 124                         Assert.AreEqual (-1, c (-1, 1));
 125                         Assert.AreEqual (-3, c (1, -3));
 126                 }
 127         }
 128 }