using Cysharp.Threading.Tasks;
using Cysharp.Threading.Tasks.Linq;
using FluentAssertions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Concurrency;
using System.Reactive.Linq;
using System.Threading.Tasks;
using Xunit;


namespace NetCoreTests.Linq
{
    public class Projection
    {
        [Theory]
        [InlineData(0, 0)]
        [InlineData(0, 1)]
        [InlineData(0, 2)]
        [InlineData(0, 10)]
        public async Task Reverse(int start, int count)
        {
            var xs = await Enumerable.Range(start, count).ToUniTaskAsyncEnumerable().Reverse().ToArrayAsync();
            var ys = Enumerable.Range(start, count).Reverse().ToArray();

            xs.Should().BeEquivalentTo(ys);
        }

        [Fact]
        public async Task ReverseException()
        {
            foreach (var item in UniTaskTestException.Throws())
            {
                var xs = item.Reverse().ToArrayAsync();
                await Assert.ThrowsAsync<UniTaskTestException>(async () => await xs);
            }
        }
    }
}