using NUnit.Framework;
using System;
using System.Collections;
using System.Collections.Generic;
using Unity.Burst;
using Unity.Collections;
using Unity.Collections.Tests;
using Unity.Collections.LowLevel.Unsafe;
using Unity.Jobs;
using Unity.Mathematics;

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     TextTransform Packages/com.unity.collections/Unity.Collections.Tests/NativeSortTests.tt
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortExtension.DefaultComparer<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortExtension.DefaultComparer<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortExtension.DefaultComparer<int>>.SegmentSortMerge))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.DescendingComparer<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.DescendingComparer<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.DescendingComparer<int>>.SegmentSortMerge))]

[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer0<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer0<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer0<int>>.SegmentSortMerge))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer1<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer1<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer1<int>>.SegmentSortMerge))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer2<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer2<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer2<int>>.SegmentSortMerge))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer3<int>>))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer3<int>>.SegmentSort))]
[assembly: RegisterGenericJobType(typeof(SortJob<int, NativeSortTests.BrokenComparer3<int>>.SegmentSortMerge))]

internal class NativeSortTests : CollectionsTestCommonBase
{
    internal struct DescendingComparer<T> : IComparer<T> where T : IComparable<T>
    {
        public int Compare(T x, T y) => y.CompareTo(x);
    }

    internal struct BrokenComparer0<T> : IComparer<T> where T : IComparable<T>
    {
        public int Compare(T x, T y)
        {
            int result = y.CompareTo(x);
            return result < 0 ? -1 : 1;
        }
    }

    internal struct BrokenComparer1<T> : IComparer<T> where T : IComparable<T>
    {
        public int Compare(T x, T y)
        {
            int result = y.CompareTo(x);
            return result > 0 ? 1 : -1;
        }
    }

    internal struct BrokenComparer2<T> : IComparer<T> where T : IComparable<T>
    {
        public int Compare(T x, T y)
        {
            int result = y.CompareTo(x);
            return math.max(0, result);
        }
    }

    internal struct BrokenComparer3<T> : IComparer<T> where T : IComparable<T>
    {
        public int Compare(T x, T y)
        {
            int result = y.CompareTo(x);
            return math.min(0, result);
        }
    }

    [Test]
    public void NativeArraySlice_BinarySearch()
    {
        var init = new int[] { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 };
        var container = new NativeArray<int>(16, Allocator.Persistent);
        var slice = new NativeSlice<int>(container, 0, container.Length);
        var arrayRo = container.AsReadOnly();
        container.CopyFrom(init);

        for (int i = 0, num = container.Length; i < num; ++i)
        {
            Assert.AreEqual(i, container.BinarySearch(container[i]));
            Assert.AreEqual(i, slice.BinarySearch(container[i]));
            Assert.AreEqual(i, arrayRo.BinarySearch(container[i]));
        }

        container.Dispose();
    }

    struct BinarySearch_Job : IJob
    {
        [ReadOnly]
        public NativeArray<int> array;

        [ReadOnly]
        public NativeSlice<int> slice;

        [ReadOnly]
        public NativeArray<int>.ReadOnly arrayRo;

        [ReadOnly]
        public NativeList<int> nativeList;

        public void Execute()
        {
            for (int i = 0, num = array.Length; i < num; ++i)
            {
                Assert.AreEqual(i, array.BinarySearch(array[i]));
                Assert.AreEqual(i, slice.BinarySearch(array[i]));
                Assert.AreEqual(i, arrayRo.BinarySearch(array[i]));
                Assert.AreEqual(i, nativeList.BinarySearch(array[i]));
            }
        }
    }

    [Test]
    public void BinarySearch_From_Job()
    {
        var init = new int[] { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 };
        var container = new NativeArray<int>(16, Allocator.Persistent);
        var slice = new NativeSlice<int>(container, 0, container.Length);
        var arrayRo = container.AsReadOnly();
        container.CopyFrom(init);

        var nativeList = new NativeList<int>(16, Allocator.Persistent);
        nativeList.CopyFrom(container);

        new BinarySearch_Job
        {
            array = container,
            slice = slice,
            arrayRo = arrayRo,
            nativeList = nativeList,

        }.Run();

        container.Dispose();
        nativeList.Dispose();
    }

    [Test]
    public void NativeArraySlice_BinarySearch_NotFound()
    {
        {
            var container = new NativeArray<int>(1, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            Assert.AreEqual(container.Length, 1);
            Assert.AreEqual(-2, container.BinarySearch(1));
            Assert.AreEqual(-2, slice.BinarySearch(1));
            Assert.AreEqual(-2, arrayRo.BinarySearch(1));

            slice[0] = 1;

            Assert.AreEqual(0, container.BinarySearch(1));
            Assert.AreEqual(0, slice.BinarySearch(1));
            Assert.AreEqual(0, arrayRo.BinarySearch(1));

            Assert.AreEqual(-1, container.BinarySearch(-2));
            Assert.AreEqual(-1, slice.BinarySearch(-2));
            Assert.AreEqual(-1, arrayRo.BinarySearch(-2));

            Assert.AreEqual(-2, container.BinarySearch(2));
            Assert.AreEqual(-2, slice.BinarySearch(2));
            Assert.AreEqual(-2, arrayRo.BinarySearch(2));

            container.Dispose();
        }

        {
            var init = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
            var container = new NativeArray<int>(16, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            container.CopyFrom(init);

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
                Assert.AreEqual(~slice.Length, slice.BinarySearch(i + 16));
                Assert.AreEqual(~arrayRo.Length, arrayRo.BinarySearch(i + 16));
            }

            container.Dispose();
        }

        {
            var init = new int[] { 0, 2, 4, 6, 8, 10, 12, 14 };
            var container = new NativeArray<int>(8, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            container.CopyFrom(init);

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, slice.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, arrayRo.BinarySearch(i * 2 + 1));
            }

            container.Dispose();
        }
    }

    [Test]
    public void NativeArraySlice_BinarySearch_NotFound_Reference_ArrayList()
    {
        {
            var reference = new ArrayList();
            reference.Add(0);
            var container = new NativeArray<int>(1, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            Assert.AreEqual(container.Length, 1);
            Assert.AreEqual(-2, reference.BinarySearch(1));
            Assert.AreEqual(-2, container.BinarySearch(1));
            Assert.AreEqual(-2, slice.BinarySearch(1));
            Assert.AreEqual(-2, arrayRo.BinarySearch(1));

            reference[0] = 1;
            slice[0] = 1;

            Assert.AreEqual(0, reference.BinarySearch(1));
            Assert.AreEqual(0, container.BinarySearch(1));
            Assert.AreEqual(0, slice.BinarySearch(1));
            Assert.AreEqual(0, arrayRo.BinarySearch(1));

            Assert.AreEqual(-1, reference.BinarySearch(-2));
            Assert.AreEqual(-1, container.BinarySearch(-2));
            Assert.AreEqual(-1, slice.BinarySearch(-2));
            Assert.AreEqual(-1, arrayRo.BinarySearch(-2));

            Assert.AreEqual(-2, reference.BinarySearch(2));
            Assert.AreEqual(-2, container.BinarySearch(2));
            Assert.AreEqual(-2, slice.BinarySearch(2));
            Assert.AreEqual(-2, arrayRo.BinarySearch(2));
        }

        {
            var init = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
            var container = new NativeArray<int>(16, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            container.CopyFrom(init);
            var reference = new ArrayList(init);

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~reference.Count, reference.BinarySearch(i + 16));
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
                Assert.AreEqual(~slice.Length, slice.BinarySearch(i + 16));
                Assert.AreEqual(~arrayRo.Length, arrayRo.BinarySearch(i + 16));
            }
        }

        {
            var init = new int[] { 0, 2, 4, 6, 8, 10, 12, 14 };
            var container = new NativeArray<int>(8, Allocator.Temp);
            var slice = new NativeSlice<int>(container, 0, container.Length);
            var arrayRo = container.AsReadOnly();

            container.CopyFrom(init);
            var reference = new ArrayList(init);

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, reference.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, slice.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, arrayRo.BinarySearch(i * 2 + 1));
            }
        }
    }



    [Test]
    public void NativeList_BinarySearch()
    {
        using (var container = new NativeList<int>(16, Allocator.Persistent) { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(i, container.BinarySearch(container[i]));
            }
        }
    }

    [Test]
    public void NativeList_BinarySearch_NotFound()
    {
        {
            var container = new NativeList<int>(1, Allocator.Temp);
            Assert.AreEqual(-1, container.BinarySearch(1));

            container.Add(1);

            Assert.AreEqual(0, container.BinarySearch(1));
            Assert.AreEqual(-1, container.BinarySearch(-2));
            Assert.AreEqual(-2, container.BinarySearch(2));
        }

        using (var container = new NativeList<int>(16, Allocator.Temp) { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
            }
        }

        using (var container = new NativeList<int>(8, Allocator.Temp) { 0, 2, 4, 6, 8, 10, 12, 14 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
            }
        }
    }

    [Test]
    public void NativeList_BinarySearch_NotFound_Reference_ArrayList()
    {
        {
            var reference = new ArrayList();
            var container = new NativeList<int>(1, Allocator.Temp);
            Assert.AreEqual(-1, reference.BinarySearch(1));
            Assert.AreEqual(-1, container.BinarySearch(1));

            reference.Add(1);
            container.Add(1);

            Assert.AreEqual(0, reference.BinarySearch(1));
            Assert.AreEqual(0, container.BinarySearch(1));

            Assert.AreEqual(-1, reference.BinarySearch(-2));
            Assert.AreEqual(-1, container.BinarySearch(-2));

            Assert.AreEqual(-2, reference.BinarySearch(2));
            Assert.AreEqual(-2, container.BinarySearch(2));
        }

        using (var container = new NativeList<int>(16, Allocator.Temp) { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 })
        {
            var reference = new ArrayList() { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~reference.Count, reference.BinarySearch(i + 16));
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
            }
        }

        using (var container = new NativeList<int>(8, Allocator.Temp) { 0, 2, 4, 6, 8, 10, 12, 14 })
        {
            var reference = new ArrayList() { 0, 2, 4, 6, 8, 10, 12, 14 };

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, reference.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
            }
        }
    }

    [Test]
    public void NativeList_GenericSortJob_NoBurst()
    {
        NativeList_GenericSortJob();
    }

    [BurstCompile]
    public static void Bursted_NativeList_GenericSortJob()
    {
        NativeList_GenericSortJob();
    }

    [Test]
    public void NativeList_GenericSortJob_Burst()
    {
        Bursted_NativeList_GenericSortJob();
    }

    public static void NativeList_GenericSortJob()
    {
        using (var container = new NativeList<int>(5, Allocator.Persistent))
        {
            for (var i = 0; i < 5; ++i)
            {
                container.Add(4 - i);
            }

            container.Sort();

            for (var i = 0; i < 5; ++i)
            {
                Assert.AreEqual(i, container[i]);
            }
        }

        using (var container = new NativeList<int>(5, Allocator.Persistent))
        {
            for (var i = 0; i < 5; ++i)
            {
                container.Add(4 - i);
            }

            container.SortJob().Schedule().Complete();

            for (var i = 0; i < 5; ++i)
            {
                Assert.AreEqual(i, container[i]);
            }
        }
    }

    [Test]
    [TestRequiresDotsDebugOrCollectionChecks]
    public void NativeList_GenericSortJobCustomComparer_NoBurst()
    {
        NativeList_GenericSortJobCustomComparer();
    }

    [BurstCompile]
    public static void Bursted_NativeList_GenericSortJobCustomComparer()
    {
        NativeList_GenericSortJobCustomComparer();
    }

    [Test]
    [TestRequiresDotsDebugOrCollectionChecks]
    public void NativeList_GenericSortJobCustomComparer_Burst()
    {
        Bursted_NativeList_GenericSortJobCustomComparer();
    }

    public static void NativeList_GenericSortJobCustomComparer()
    {
        var num = 35;
        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(i);
            }

            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer0<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer1<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer2<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer3<int>()));

            container.Sort(new DescendingComparer<int>());

            for (var i = 0; i < num; ++i)
            {
                Assert.AreEqual(num - 1 - i, container[i]);
            }
        }

        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(i);
            }

            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer0<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer1<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer2<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer3<int>()).Schedule().Complete());

            container.SortJob(new DescendingComparer<int>()).Schedule().Complete();

            for (var i = 0; i < num; ++i)
            {
                Assert.AreEqual(num - 1 - i, container[i]);
            }
        }
    }

    [Test]
    public void UnsafeList_BinarySearch()
    {
        using (var container = new UnsafeList<int>(16, Allocator.Persistent) { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(i, container.BinarySearch(container[i]));
            }
        }
    }

    [Test]
    public void UnsafeList_BinarySearch_NotFound()
    {
        {
            var container = new UnsafeList<int>(1, Allocator.Temp);
            Assert.AreEqual(-1, container.BinarySearch(1));

            container.Add(1);

            Assert.AreEqual(0, container.BinarySearch(1));
            Assert.AreEqual(-1, container.BinarySearch(-2));
            Assert.AreEqual(-2, container.BinarySearch(2));
        }

        using (var container = new UnsafeList<int>(16, Allocator.Temp) { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
            }
        }

        using (var container = new UnsafeList<int>(8, Allocator.Temp) { 0, 2, 4, 6, 8, 10, 12, 14 })
        {
            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
            }
        }
    }

    [Test]
    public void UnsafeList_BinarySearch_NotFound_Reference_ArrayList()
    {
        {
            var reference = new ArrayList();
            var container = new UnsafeList<int>(1, Allocator.Temp);
            Assert.AreEqual(-1, reference.BinarySearch(1));
            Assert.AreEqual(-1, container.BinarySearch(1));

            reference.Add(1);
            container.Add(1);

            Assert.AreEqual(0, reference.BinarySearch(1));
            Assert.AreEqual(0, container.BinarySearch(1));

            Assert.AreEqual(-1, reference.BinarySearch(-2));
            Assert.AreEqual(-1, container.BinarySearch(-2));

            Assert.AreEqual(-2, reference.BinarySearch(2));
            Assert.AreEqual(-2, container.BinarySearch(2));
        }

        using (var container = new UnsafeList<int>(16, Allocator.Temp) { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 })
        {
            var reference = new ArrayList() { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~reference.Count, reference.BinarySearch(i + 16));
                Assert.AreEqual(~container.Length, container.BinarySearch(i + 16));
            }
        }

        using (var container = new UnsafeList<int>(8, Allocator.Temp) { 0, 2, 4, 6, 8, 10, 12, 14 })
        {
            var reference = new ArrayList() { 0, 2, 4, 6, 8, 10, 12, 14 };

            for (int i = 0, num = container.Length; i < num; ++i)
            {
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, reference.BinarySearch(i * 2 + 1));
                Assert.AreEqual(~(i + 1) /* ~index of first greatest value searched */, container.BinarySearch(i * 2 + 1));
            }
        }
    }

    [Test]
    public void UnsafeList_GenericSortJob_NoBurst()
    {
        UnsafeList_GenericSortJob();
    }

    [BurstCompile]
    public static void Bursted_UnsafeList_GenericSortJob()
    {
        UnsafeList_GenericSortJob();
    }

    [Test]
    public void UnsafeList_GenericSortJob_Burst()
    {
        Bursted_UnsafeList_GenericSortJob();
    }

    public static void UnsafeList_GenericSortJob()
    {
        using (var container = new UnsafeList<int>(5, Allocator.Persistent))
        {
            for (var i = 0; i < 5; ++i)
            {
                container.Add(4 - i);
            }

            container.Sort();

            for (var i = 0; i < 5; ++i)
            {
                Assert.AreEqual(i, container[i]);
            }
        }

        using (var container = new UnsafeList<int>(5, Allocator.Persistent))
        {
            for (var i = 0; i < 5; ++i)
            {
                container.Add(4 - i);
            }

            container.SortJob().Schedule().Complete();

            for (var i = 0; i < 5; ++i)
            {
                Assert.AreEqual(i, container[i]);
            }
        }
    }

    [Test]
    [TestRequiresDotsDebugOrCollectionChecks]
    public void UnsafeList_GenericSortJobCustomComparer_NoBurst()
    {
        UnsafeList_GenericSortJobCustomComparer();
    }

    [BurstCompile]
    public static void Bursted_UnsafeList_GenericSortJobCustomComparer()
    {
        UnsafeList_GenericSortJobCustomComparer();
    }

    [Test]
    [TestRequiresDotsDebugOrCollectionChecks]
    public void UnsafeList_GenericSortJobCustomComparer_Burst()
    {
        Bursted_UnsafeList_GenericSortJobCustomComparer();
    }

    public static void UnsafeList_GenericSortJobCustomComparer()
    {
        var num = 35;
        using (var container = new UnsafeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(i);
            }

            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer0<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer1<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer2<int>()));
            Assert.Throws<InvalidOperationException>(() => container.Sort(new BrokenComparer3<int>()));

            container.Sort(new DescendingComparer<int>());

            for (var i = 0; i < num; ++i)
            {
                Assert.AreEqual(num - 1 - i, container[i]);
            }
        }

        using (var container = new UnsafeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(i);
            }

            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer0<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer1<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer2<int>()).Schedule().Complete());
            Assert.Throws<InvalidOperationException>(() => container.SortJob(new BrokenComparer3<int>()).Schedule().Complete());

            container.SortJob(new DescendingComparer<int>()).Schedule().Complete();

            for (var i = 0; i < num; ++i)
            {
                Assert.AreEqual(num - 1 - i, container[i]);
            }
        }
    }


    [Test]
    public void FixedList32Bytes_GenericSort()
    {
        var container = new FixedList32Bytes<int>();

        for (var i = 0; i < 5; ++i)
        {
            container.Add(i);
        }

        container.Sort(new DescendingComparer<int>());

        for (var i = 0; i < 5; ++i)
        {
            Assert.AreEqual(4 - i, container[i]);
        }
    }


    [Test]
    public void FixedList64Bytes_GenericSort()
    {
        var container = new FixedList64Bytes<int>();

        for (var i = 0; i < 5; ++i)
        {
            container.Add(i);
        }

        container.Sort(new DescendingComparer<int>());

        for (var i = 0; i < 5; ++i)
        {
            Assert.AreEqual(4 - i, container[i]);
        }
    }


    [Test]
    public void FixedList128Bytes_GenericSort()
    {
        var container = new FixedList128Bytes<int>();

        for (var i = 0; i < 5; ++i)
        {
            container.Add(i);
        }

        container.Sort(new DescendingComparer<int>());

        for (var i = 0; i < 5; ++i)
        {
            Assert.AreEqual(4 - i, container[i]);
        }
    }


    [Test]
    public void FixedList512Bytes_GenericSort()
    {
        var container = new FixedList512Bytes<int>();

        for (var i = 0; i < 5; ++i)
        {
            container.Add(i);
        }

        container.Sort(new DescendingComparer<int>());

        for (var i = 0; i < 5; ++i)
        {
            Assert.AreEqual(4 - i, container[i]);
        }
    }


    [Test]
    public void FixedList4096Bytes_GenericSort()
    {
        var container = new FixedList4096Bytes<int>();

        for (var i = 0; i < 5; ++i)
        {
            container.Add(i);
        }

        container.Sort(new DescendingComparer<int>());

        for (var i = 0; i < 5; ++i)
        {
            Assert.AreEqual(4 - i, container[i]);
        }
    }

    unsafe static void IntroSortNoComparerCheck<T, U>(T* array, int length, U comp)
        where T : unmanaged
        where U : IComparer<T>
    {
        NativeSortExtension.IntroSort_R<T, U>(array, 0, length - 1, 2 * CollectionHelper.Log2Floor(length), comp);
    }

    [Test]
    [TestRequiresDotsDebugOrCollectionChecks]
    public unsafe void NativeList_BrokenCustomComparerDoesNotCrash()
    {
        var rng = new Unity.Mathematics.Random(1);

        var num = 10000;
        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(rng.NextInt());
            }

            Assert.DoesNotThrow(() => IntroSortNoComparerCheck(container.GetUnsafePtr(), container.Length, new BrokenComparer0<int>()));
        }

        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(rng.NextInt());
            }

            Assert.DoesNotThrow(() => IntroSortNoComparerCheck(container.GetUnsafePtr(), container.Length, new BrokenComparer1<int>()));
        }

        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(rng.NextInt());
            }

            Assert.DoesNotThrow(() => IntroSortNoComparerCheck(container.GetUnsafePtr(), container.Length, new BrokenComparer2<int>()));
        }

        using (var container = new NativeList<int>(num, Allocator.Persistent))
        {
            for (var i = 0; i < num; ++i)
            {
                container.Add(rng.NextInt());
            }

            Assert.DoesNotThrow(() => IntroSortNoComparerCheck(container.GetUnsafePtr(), container.Length, new BrokenComparer3<int>()));
        }
    }
}