mono/mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest_Power.cs

// Permission is hereby granted, free of charge, to any person obtaining
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// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
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// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// Ad
// 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
//
// Authors:
//		Federico Di Gregorio <[email protected]>
//		Miguel de Icaza <[email protected]>

using System;
using System.Reflection;
using System.Linq;
using System.Linq.Expressions;
using NUnit.Framework;

namespace MonoTests.System.Linq.Expressions
{
	[TestFixture]
	public class ExpressionTest_Power
	{
		[Test]
		[ExpectedException (typeof (ArgumentNullException))]
		public void Arg1Null ()
		{
			Expression.Power (null, Expression.Constant (1.0));
		}

		[Test]
		[ExpectedException (typeof (ArgumentNullException))]
		public void Arg2Null ()
		{
			Expression.Power (Expression.Constant (1.0), null);
		}

		[Test]
		[ExpectedException (typeof (InvalidOperationException))]
		public void ArgTypesDifferent ()
		{
			Expression.Power (Expression.Constant (1), Expression.Constant (2.0));
		}

		[Test]
		[ExpectedException (typeof (InvalidOperationException))]
		public void ArgTypesInt ()
		{
			Expression.Power (Expression.Constant (1), Expression.Constant (2));
		}

		[Test]
		[ExpectedException (typeof (InvalidOperationException))]
		public void ArgTypesFloat ()
		{
			Expression.Power (Expression.Constant ((float)1), Expression.Constant ((float)2));
		}

		[Test]
		public void ArgTypesFloat_OK ()
		{
			Expression.Power (Expression.Constant (1.0), Expression.Constant (2.0));
		}

#if false
		[Test]
		[ExpectedException (typeof (InvalidOperationException))]
		public void NoOperatorClass ()
		{
			Expression.Subtract (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
		}
	
		[Test]
		public void Nullable ()
		{
			int? a = 1;
			int? b = 2;

			BinaryExpression expr = Expression.Subtract (Expression.Constant (a), Expression.Constant (b));
			Assert.AreEqual (ExpressionType.Subtract, expr.NodeType, "Subtract#05");
			Assert.AreEqual (typeof (int), expr.Type, "Subtract#06");
			Assert.IsNull (expr.Method, "Subtract#07");
			Assert.AreEqual ("(1 - 2)", expr.ToString(), "Subtract#08");
		}

		[Test]
		public void UserDefinedClass ()
		{
			// We can use the simplest version of GetMethod because we already know only one
			// exists in the very simple class we're using for the tests.
			MethodInfo mi = typeof (OpClass).GetMethod ("op_Subtraction");

			BinaryExpression expr = Expression.Subtract (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
			Assert.AreEqual (ExpressionType.Subtract, expr.NodeType, "Subtract#09");
			Assert.AreEqual (typeof (OpClass), expr.Type, "Subtract#10");
			Assert.AreEqual (mi, expr.Method, "Subtract#11");
			Assert.AreEqual ("op_Subtraction", expr.Method.Name, "Subtract#12");
			Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) - value(MonoTests.System.Linq.Expressions.OpClass))",
				expr.ToString(), "Subtract#13");
		}
#endif
	}
}