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

//
// ExpressionTest_Loop.cs
//
// Author:
//   Marek Safar ([email protected])
//
// Copyright (C) 2016 Xamarin Inc (http://www.xamarin.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_Loop {

		[Test]
		public void ComplexTest ()
		{
            var breakLabel = Expression.Label ("LoopBreak");
            var counter = Expression.Variable (typeof (int), "counter");

            var l = Expression.Block (new[] { counter },
                Expression.Assign (counter, Expression.Constant (-1)),
                Expression.Loop (
                Expression.Block (Expression.IfThenElse (
                    Expression.Equal (Expression.Assign (counter, Expression.Add (counter, Expression.Constant (1))), Expression.Constant (1000)),
                    Expression.Block (Expression.Break (breakLabel)),
                    Expression.Call (null, typeof (Console).GetMethod ("WriteLine", new Type[] { typeof (int) }), counter)
                )),
                breakLabel)
           );

            var res = Expression.Lambda<Action> (l).Compile ();
        }

		[Test]
		public void ComplexTest_2 ()
		{
            var breakLabel = Expression.Label ("LoopBreak");
            var counter = Expression.Variable (typeof (int), "counter");

            var l = Expression.Block (new[] { counter },
                Expression.Assign (counter, Expression.Constant(-1)),
                Expression.Loop (
                Expression.IfThenElse (
                    Expression.Equal (Expression.Assign (counter, Expression.Add (counter, Expression.Constant (1))), Expression.Constant (1000)),
                    Expression.Break (breakLabel),
                    Expression.Call (null, typeof (Console).GetMethod ("WriteLine", new Type[] { typeof (int) }), counter)
                ),
                breakLabel)
           );

            var res = Expression.Lambda<Action> (l).Compile ();
		}
	}
}