﻿// The MIT License (MIT)
// 
// Copyright (c) 2017 Jesse Sweetland
// 
// 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.Threading;
using System.Threading.Tasks;
using System.Transactions;
using Moq;
using Xunit;

namespace Platibus.UnitTests
{
    [Trait("Category", "UnitTests")]
    public class MessageContextExtensionsTests
    {
        [Fact]
        public async Task MessageAcknowledgedWhenContextEnlistedInCompletedTransaction()
        {
            const string message = "Hello, world!";
            var mockMessageContext = new Mock<IMessageContext>();
            var cancellationTokenSource = new CancellationTokenSource();
            var messageHandler = new DelegateMessageHandler((msg, msgCtx) =>
            {
                using (var scope = new TransactionScope())
                {
                    msgCtx.EnlistInCurrentTransaction();
                    scope.Complete();
                }
            });

            await messageHandler.HandleMessage(message, mockMessageContext.Object, cancellationTokenSource.Token);
            mockMessageContext.Verify(msgCtx => msgCtx.Acknowledge(), Times.Once());
        }

        [Fact]
        public async Task MessageNotAcknowledgedWhenContextEnlistedInIncompleteTransaction()
        {
            const string message = "Hello, world!";
            var mockMessageContext = new Mock<IMessageContext>();
            var cancellationTokenSource = new CancellationTokenSource();
            var messageHandler = new DelegateMessageHandler((msg, msgCtx) =>
            {
                using (new TransactionScope())
                {
                    msgCtx.EnlistInCurrentTransaction();
                }
            });

            await messageHandler.HandleMessage(message, mockMessageContext.Object, cancellationTokenSource.Token);
            mockMessageContext.Verify(msgCtx => msgCtx.Acknowledge(), Times.Never());
        }
    }
}