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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//
// The above copyright notice and this permission notice shall be
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// Ad
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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//
// 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 ()
		{
			BinaryExpression p = Expression.Power (Expression.Constant (1.0), Expression.Constant (2.0));

			Assert.AreEqual (ExpressionType.Power, p.NodeType, "Power#01");
			Assert.AreEqual (typeof (double), p.Type, "Add#02");
		}

		[Test]
		public void TestCompile ()
		{
			ParameterExpression a = Expression.Parameter(typeof(double), "a");
			ParameterExpression b = Expression.Parameter(typeof(double), "b");
			BinaryExpression p = Expression.Power (a, b);
			
			Expression<Func<double,double,double>> pexpr = Expression.Lambda<Func<double,double,double>> (p, new ParameterExpression [] { a, b });
			Func<double,double,double> compiled = pexpr.Compile ();
			Assert.AreEqual (1, compiled (1, 10));
			Assert.AreEqual (16, compiled (2, 4));
		}

	}
}