// BatchedJoinBlockTest.cs
//  
// Copyright (c) 2012 Petr Onderka
// 
// 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.Collections.Generic;
using System.Threading;
using System.Threading.Tasks.Dataflow;
using NUnit.Framework;

namespace MonoTests.System.Threading.Tasks.Dataflow {
	[TestFixture]
	public class BatchedJoinBlockTest {
		[Test]
		public void BasicUsageTest()
		{
			Tuple<IList<int>, IList<int>> result = null;
			var evt = new ManualResetEventSlim (false);

			var actionBlock = new ActionBlock<Tuple<IList<int>, IList<int>>> (r =>
			{
				result = r;
				evt.Set ();
			});
			var block = new BatchedJoinBlock<int, int> (2);

			block.LinkTo (actionBlock);

			// both targets once
			Assert.IsTrue (block.Target1.Post (1));

			Assert.IsFalse(evt.Wait(100));
			Assert.IsNull (result);

			Assert.IsTrue (block.Target2.Post (2));

			Assert.IsTrue (evt.Wait (100));

			Assert.IsNotNull (result);
			CollectionAssert.AreEqual (new[] { 1 }, result.Item1);
			CollectionAssert.AreEqual (new[] { 2 }, result.Item2);

			result = null;
			evt.Reset ();

			// target 1 twice
			Assert.IsTrue (block.Target1.Post (3));

			Assert.IsFalse(evt.Wait(100));
			Assert.IsNull (result);

			Assert.IsTrue (block.Target1.Post (4));
			Assert.IsTrue (evt.Wait (100));

			Assert.IsNotNull (result);
			CollectionAssert.AreEqual (new[] { 3, 4 }, result.Item1);
			CollectionAssert.IsEmpty (result.Item2);

			result = null;
			evt.Reset ();

			// target 2 twice
			Assert.IsTrue (block.Target2.Post (5));

			Assert.IsFalse(evt.Wait(100));
			Assert.IsNull (result);

			Assert.IsTrue (block.Target2.Post (6));
			Assert.IsTrue (evt.Wait (100));

			Assert.IsNotNull (result);
			CollectionAssert.IsEmpty (result.Item1);
			CollectionAssert.AreEqual (new[] { 5, 6 }, result.Item2);
		}
	}
}