/mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest_Negate.cs
https://github.com/t-ashula/mono · C# · 315 lines · 236 code · 52 blank · 27 comment · 2 complexity · 16a78bc796998521e3cfda07707fa367 MD5 · raw file
- //
- // ExpressionTest_Negate.cs
- //
- // Author:
- // Jb Evain (jbevain@novell.com)
- //
- // (C) 2008 Novell, Inc. (http://www.novell.com)
- //
- // Permission is hereby granted, free of charge, to any person obtaining
- // a copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to
- // permit persons to whom the Software is furnished to do so, subject to
- // the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- //
- using System;
- using System.Reflection;
- using System.Linq;
- using System.Linq.Expressions;
- using NUnit.Framework;
- namespace MonoTests.System.Linq.Expressions
- {
- [TestFixture]
- public class ExpressionTest_Negate
- {
- [Test]
- [ExpectedException (typeof (ArgumentNullException))]
- public void Arg1Null ()
- {
- Expression.Negate (null);
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void MethodArgNotStatic ()
- {
- Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryNotStatic"));
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void MethodArgParameterCount ()
- {
- Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryParameterCount"));
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void MethodArgReturnsVoid ()
- {
- Expression.Negate (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryReturnVoid"));
- }
- [Test]
- [ExpectedException (typeof (InvalidOperationException))]
- public void NegateBool ()
- {
- Expression.Negate (true.ToConstant ());
- }
- [Test]
- public void Number ()
- {
- var up = Expression.Negate (Expression.Constant (1));
- Assert.AreEqual ("-1", up.ToString ());
- }
- [Test]
- public void UserDefinedClass ()
- {
- var mi = typeof (OpClass).GetMethod ("op_UnaryNegation");
- var expr = Expression.Negate (Expression.Constant (new OpClass ()));
- Assert.AreEqual (ExpressionType.Negate, expr.NodeType);
- Assert.AreEqual (typeof (OpClass), expr.Type);
- Assert.AreEqual (mi, expr.Method);
- Assert.AreEqual ("op_UnaryNegation", expr.Method.Name);
- Assert.AreEqual ("-value(MonoTests.System.Linq.Expressions.OpClass)", expr.ToString ());
- }
- [Test]
- public void NegateNullableInt32 ()
- {
- var n = Expression.Negate (Expression.Parameter (typeof (int?), ""));
- Assert.AreEqual (typeof (int?), n.Type);
- Assert.IsTrue (n.IsLifted);
- Assert.IsTrue (n.IsLiftedToNull);
- Assert.IsNull (n.Method);
- }
- [Test]
- public void CompileNegateInt32 ()
- {
- var p = Expression.Parameter (typeof (int), "i");
- var negate = Expression.Lambda<Func<int, int>> (Expression.Negate (p), p).Compile ();
- Assert.AreEqual (-2, negate (2));
- Assert.AreEqual (0, negate (0));
- Assert.AreEqual (3, negate (-3));
- }
- [Test]
- public void CompiledNegateNullableInt32 ()
- {
- var p = Expression.Parameter (typeof (int?), "i");
- var negate = Expression.Lambda<Func<int?, int?>> (Expression.Negate (p), p).Compile ();
- Assert.AreEqual (null, negate (null));
- Assert.AreEqual ((int?) -2, negate (2));
- Assert.AreEqual ((int?) 0, negate (0));
- Assert.AreEqual ((int?) 3, negate (-3));
- }
- struct Slot {
- public int Value;
- public Slot (int value)
- {
- this.Value = value;
- }
- public static Slot operator - (Slot s)
- {
- return new Slot (-s.Value);
- }
- }
- [Test]
- public void UserDefinedNegate ()
- {
- var s = Expression.Parameter (typeof (Slot), "s");
- var node = Expression.Negate (s);
- Assert.IsFalse (node.IsLifted);
- Assert.IsFalse (node.IsLiftedToNull);
- Assert.AreEqual (typeof (Slot), node.Type);
- var negate = Expression.Lambda<Func<Slot, Slot>> (node, s).Compile ();
- Assert.AreEqual (new Slot (-2), negate (new Slot (2)));
- Assert.AreEqual (new Slot (42), negate (new Slot (-42)));
- }
- [Test]
- [Category ("NotWorkingInterpreter")]
- public void UserDefinedNotNullableNegateNullable ()
- {
- var s = Expression.Parameter (typeof (Slot?), "s");
- var node = Expression.Negate (s);
- Assert.IsTrue (node.IsLifted);
- Assert.IsTrue (node.IsLiftedToNull);
- Assert.AreEqual (typeof (Slot?), node.Type);
- var negate = Expression.Lambda<Func<Slot?, Slot?>> (node, s).Compile ();
- Assert.AreEqual (null, negate (null));
- Assert.AreEqual (new Slot (42), negate (new Slot (-42)));
- Assert.AreEqual (new Slot (-2), negate (new Slot (2)));
- }
- struct SlotToNullable {
- public int Value;
- public SlotToNullable (int value)
- {
- this.Value = value;
- }
- public static SlotToNullable? operator - (SlotToNullable s)
- {
- return new SlotToNullable (-s.Value);
- }
- }
- [Test]
- [ExpectedException (typeof (InvalidOperationException))]
- public void UserDefinedToNullableNegateFromNullable ()
- {
- Expression.Negate (Expression.Parameter (typeof (SlotToNullable?), "s"));
- }
- [Test]
- public void UserDefinedToNullableNegateNullable ()
- {
- var s = Expression.Parameter (typeof (SlotToNullable), "s");
- var node = Expression.Negate (s);
- Assert.IsFalse (node.IsLifted);
- Assert.IsFalse (node.IsLiftedToNull);
- Assert.AreEqual (typeof (SlotToNullable?), node.Type);
- var negate = Expression.Lambda<Func<SlotToNullable, SlotToNullable?>> (node, s).Compile ();
- Assert.AreEqual ((SlotToNullable?) new SlotToNullable (42), negate (new SlotToNullable (-42)));
- Assert.AreEqual ((SlotToNullable?) new SlotToNullable (-2), negate (new SlotToNullable (2)));
- }
- struct SlotFromNullable {
- public int Value;
- public SlotFromNullable (int value)
- {
- this.Value = value;
- }
- public static SlotFromNullable operator - (SlotFromNullable? s)
- {
- if (s.HasValue)
- return new SlotFromNullable (-s.Value.Value);
- else
- return new SlotFromNullable (-1);
- }
- }
- [Test]
- public void UserDefinedNegateFromNullable ()
- {
- var s = Expression.Parameter (typeof (SlotFromNullable?), "s");
- var node = Expression.Negate (s);
- Assert.IsFalse (node.IsLifted);
- Assert.IsFalse (node.IsLiftedToNull);
- Assert.AreEqual (typeof (SlotFromNullable), node.Type);
- var negate = Expression.Lambda<Func<SlotFromNullable?, SlotFromNullable>> (node, s).Compile ();
- Assert.AreEqual (new SlotFromNullable (-2), negate (new SlotFromNullable (2)));
- Assert.AreEqual (new SlotFromNullable (42), negate (new SlotFromNullable (-42)));
- Assert.AreEqual (new SlotFromNullable (-1), negate (null));
- }
- struct SlotFromNullableToNullable {
- public int Value;
- public SlotFromNullableToNullable (int value)
- {
- this.Value = value;
- }
- public static SlotFromNullableToNullable? operator - (SlotFromNullableToNullable? s)
- {
- if (s.HasValue)
- return new SlotFromNullableToNullable (-s.Value.Value);
- else
- return s;
- }
- }
- [Test]
- public void UserDefinedNegateFromNullableNotNullable ()
- {
- var s = Expression.Parameter (typeof (SlotFromNullableToNullable?), "s");
- var node = Expression.Negate (s);
- Assert.IsFalse (node.IsLifted);
- Assert.IsFalse (node.IsLiftedToNull);
- Assert.AreEqual (typeof (SlotFromNullableToNullable?), node.Type);
- var negate = Expression.Lambda<Func<SlotFromNullableToNullable?, SlotFromNullableToNullable?>> (
- node, s).Compile ();
- Assert.AreEqual (new SlotFromNullableToNullable (-2), negate (new SlotFromNullableToNullable (2)));
- Assert.AreEqual (new SlotFromNullableToNullable (42), negate (new SlotFromNullableToNullable (-42)));
- Assert.AreEqual (null, negate (null));
- }
- [Test]
- public void NegateDecimal ()
- {
- var d = Expression.Parameter (typeof (decimal), "l");
- var meth = typeof (decimal).GetMethod ("op_UnaryNegation", new [] { typeof (decimal) });
- var node = Expression.Negate (d);
- Assert.IsFalse (node.IsLifted);
- Assert.IsFalse (node.IsLiftedToNull);
- Assert.AreEqual (typeof (decimal), node.Type);
- Assert.AreEqual (meth, node.Method);
- var neg = Expression.Lambda<Func<decimal, decimal>> (node, d).Compile ();
- Assert.AreEqual (-2m, neg (2m));
- }
- [Test]
- [Category ("NotWorkingInterpreter")]
- public void NegateLiftedDecimal ()
- {
- var d = Expression.Parameter (typeof (decimal?), "l");
- var meth = typeof (decimal).GetMethod ("op_UnaryNegation", new [] { typeof (decimal) });
- var node = Expression.Negate (d);
- Assert.IsTrue (node.IsLifted);
- Assert.IsTrue (node.IsLiftedToNull);
- Assert.AreEqual (typeof (decimal?), node.Type);
- Assert.AreEqual (meth, node.Method);
- var neg = Expression.Lambda<Func<decimal?, decimal?>> (node, d).Compile ();
- Assert.AreEqual (-2m, neg (2m));
- Assert.AreEqual (null, neg (null));
- }
- }
- }