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SequenceEqualTests.cs
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SequenceEqualTests.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using Xunit;
namespace System.Linq.Parallel.Tests
{
public static class SequenceEqualTests
{
private const int DuplicateFactor = 8;
//
// SequenceEqual
//
public static IEnumerable<object[]> SequenceEqualData(int[] counts)
{
foreach (object[] left in Sources.Ranges(counts.DefaultIfEmpty(Sources.OuterLoopCount / 4)))
{
foreach (object[] right in Sources.Ranges(new[] { (int)left[1] }))
{
yield return new object[] { left[0], right[0], right[1] };
}
}
}
public static IEnumerable<object[]> SequenceEqualUnequalSizeData(int[] counts)
{
foreach (object[] left in Sources.Ranges(counts.DefaultIfEmpty(Sources.OuterLoopCount / 4)))
{
foreach (object[] right in Sources.Ranges(new[] { 1, ((int)left[1] - 1) / 2 + 1, (int)left[1] * 2 + 1 }.Distinct()))
{
yield return new object[] { left[0], left[1], right[0], right[1] };
}
}
}
public static IEnumerable<object[]> SequenceEqualUnequalData(int[] counts)
{
foreach (object[] left in Sources.Ranges(counts.DefaultIfEmpty(Sources.OuterLoopCount / 4)))
{
Func<int, IEnumerable<int>> items = x => new[] { 0, x / 8, x / 2, x * 7 / 8, x - 1 }.Distinct();
foreach (object[] right in Sources.Ranges(new[] { (int)left[1] }, items))
{
yield return new object[] { left[0], right[0], right[1], right[2] };
}
}
}
[Theory]
[MemberData(nameof(SequenceEqualData), new[] { 0, 1, 2, 16 })]
public static void SequenceEqual(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
_ = count;
ParallelQuery<int> leftQuery = left.Item;
ParallelQuery<int> rightQuery = right.Item;
Assert.True(leftQuery.SequenceEqual(rightQuery));
Assert.True(rightQuery.SequenceEqual(leftQuery));
Assert.True(leftQuery.SequenceEqual(leftQuery));
}
[Theory]
[OuterLoop]
[MemberData(nameof(SequenceEqualData), new int[] { /* Sources.OuterLoopCount */ })]
public static void SequenceEqual_Longrunning(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
SequenceEqual(left, right, count);
}
[Theory]
[MemberData(nameof(SequenceEqualData), new[] { 0, 1, 2, 16 })]
public static void SequenceEqual_CustomComparator(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
ParallelQuery<int> leftQuery = left.Item;
ParallelQuery<int> rightQuery = right.Item;
Assert.True(leftQuery.SequenceEqual(rightQuery, new ModularCongruenceComparer(DuplicateFactor)));
Assert.True(rightQuery.SequenceEqual(leftQuery, new ModularCongruenceComparer(DuplicateFactor)));
Assert.True(leftQuery.SequenceEqual(leftQuery, new ModularCongruenceComparer(DuplicateFactor)));
ParallelQuery<int> repeating = Enumerable.Range(0, (count + (DuplicateFactor - 1)) / DuplicateFactor).SelectMany(x => Enumerable.Range(0, DuplicateFactor)).Take(count).AsParallel().AsOrdered();
Assert.True(leftQuery.SequenceEqual(repeating, new ModularCongruenceComparer(DuplicateFactor)));
Assert.True(rightQuery.SequenceEqual(repeating, new ModularCongruenceComparer(DuplicateFactor)));
Assert.True(repeating.SequenceEqual(rightQuery, new ModularCongruenceComparer(DuplicateFactor)));
Assert.True(repeating.SequenceEqual(leftQuery, new ModularCongruenceComparer(DuplicateFactor)));
}
[Theory]
[OuterLoop]
[MemberData(nameof(SequenceEqualData), new int[] { /* Sources.OuterLoopCount */ })]
public static void SequenceEqual_CustomComparator_Longrunning(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
SequenceEqual_CustomComparator(left, right, count);
}
[Theory]
[MemberData(nameof(SequenceEqualUnequalSizeData), new[] { 0, 4, 16 })]
public static void SequenceEqual_UnequalSize(Labeled<ParallelQuery<int>> left, int leftCount, Labeled<ParallelQuery<int>> right, int rightCount)
{
_ = leftCount;
_ = rightCount;
ParallelQuery<int> leftQuery = left.Item;
ParallelQuery<int> rightQuery = right.Item;
Assert.False(leftQuery.SequenceEqual(rightQuery));
Assert.False(rightQuery.SequenceEqual(leftQuery));
Assert.False(leftQuery.SequenceEqual(rightQuery, new ModularCongruenceComparer(2)));
Assert.False(rightQuery.SequenceEqual(leftQuery, new ModularCongruenceComparer(2)));
}
[Theory]
[OuterLoop]
[MemberData(nameof(SequenceEqualUnequalSizeData), new int[] { /* Sources.OuterLoopCount */ })]
public static void SequenceEqual_UnequalSize_Longrunning(Labeled<ParallelQuery<int>> left, int leftCount, Labeled<ParallelQuery<int>> right, int rightCount)
{
SequenceEqual_UnequalSize(left, leftCount, right, rightCount);
}
[Theory]
[MemberData(nameof(SequenceEqualUnequalData), new[] { 1, 2, 16 })]
public static void SequenceEqual_Unequal(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count, int item)
{
_ = count;
ParallelQuery<int> leftQuery = left.Item;
ParallelQuery<int> rightQuery = right.Item.Select(x => x == item ? -1 : x);
Assert.False(leftQuery.SequenceEqual(rightQuery));
Assert.False(rightQuery.SequenceEqual(leftQuery));
Assert.True(leftQuery.SequenceEqual(leftQuery));
}
[Theory]
[OuterLoop]
[MemberData(nameof(SequenceEqualUnequalData), new int[] { /* Sources.OuterLoopCount */ })]
public static void SequenceEqual_Unequal_Longrunning(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count, int item)
{
SequenceEqual_Unequal(left, right, count, item);
}
[Fact]
public static void SequenceEqual_NotSupportedException()
{
#pragma warning disable 618
Assert.Throws<NotSupportedException>(() => ParallelEnumerable.Range(0, 1).SequenceEqual(Enumerable.Range(0, 1)));
Assert.Throws<NotSupportedException>(() => ParallelEnumerable.Range(0, 1).SequenceEqual(Enumerable.Range(0, 1), null));
#pragma warning restore 618
}
[Fact]
public static void SequenceEqual_OperationCanceledException()
{
AssertThrows.EventuallyCanceled((source, canceler) => source.OrderBy(x => x).SequenceEqual(ParallelEnumerable.Range(0, 128).AsOrdered(), new CancelingEqualityComparer<int>(canceler)));
AssertThrows.EventuallyCanceled((source, canceler) => ParallelEnumerable.Range(0, 128).AsOrdered().SequenceEqual(source.OrderBy(x => x), new CancelingEqualityComparer<int>(canceler)));
}
[Fact]
public static void SequenceEqual_AggregateException_Wraps_OperationCanceledException()
{
AssertThrows.OtherTokenCanceled((source, canceler) => source.OrderBy(x => x).SequenceEqual(ParallelEnumerable.Range(0, 128).AsOrdered(), new CancelingEqualityComparer<int>(canceler)));
AssertThrows.OtherTokenCanceled((source, canceler) => ParallelEnumerable.Range(0, 128).AsOrdered().SequenceEqual(source.OrderBy(x => x), new CancelingEqualityComparer<int>(canceler)));
AssertThrows.SameTokenNotCanceled((source, canceler) => source.OrderBy(x => x).SequenceEqual(ParallelEnumerable.Range(0, 128).AsOrdered(), new CancelingEqualityComparer<int>(canceler)));
AssertThrows.SameTokenNotCanceled((source, canceler) => ParallelEnumerable.Range(0, 128).AsOrdered().SequenceEqual(source.OrderBy(x => x), new CancelingEqualityComparer<int>(canceler)));
}
[Fact]
public static void SequenceEqual_OperationCanceledException_PreCanceled()
{
AssertThrows.AlreadyCanceled(source => source.SequenceEqual(ParallelEnumerable.Range(0, 2)));
AssertThrows.AlreadyCanceled(source => source.SequenceEqual(ParallelEnumerable.Range(0, 2), new ModularCongruenceComparer(1)));
AssertThrows.AlreadyCanceled(source => ParallelEnumerable.Range(0, 2).SequenceEqual(source));
AssertThrows.AlreadyCanceled(source => ParallelEnumerable.Range(0, 2).SequenceEqual(source, new ModularCongruenceComparer(1)));
}
[Theory]
[MemberData(nameof(SequenceEqualData), new[] { 4 })]
public static void SequenceEqual_AggregateException(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
_ = count;
AssertThrows.Wrapped<DeliberateTestException>(() => left.Item.SequenceEqual(right.Item, new FailingEqualityComparer<int>()));
}
[Fact]
// Should not get the same setting from both operands.
public static void SequenceEqual_NoDuplicateSettings()
{
CancellationToken t = new CancellationTokenSource().Token;
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, 1).WithCancellation(t).SequenceEqual(ParallelEnumerable.Range(0, 1).WithCancellation(t)));
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, 1).WithDegreeOfParallelism(1).SequenceEqual(ParallelEnumerable.Range(0, 1).WithDegreeOfParallelism(1)));
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, 1).WithExecutionMode(ParallelExecutionMode.Default).SequenceEqual(ParallelEnumerable.Range(0, 1).WithExecutionMode(ParallelExecutionMode.Default)));
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, 1).WithMergeOptions(ParallelMergeOptions.Default).SequenceEqual(ParallelEnumerable.Range(0, 1).WithMergeOptions(ParallelMergeOptions.Default)));
}
[Fact]
public static void SequenceEqual_ArgumentNullException()
{
AssertExtensions.Throws<ArgumentNullException>("first", () => ((ParallelQuery<int>)null).SequenceEqual(ParallelEnumerable.Range(0, 1)));
AssertExtensions.Throws<ArgumentNullException>("second", () => ParallelEnumerable.Range(0, 1).SequenceEqual((ParallelQuery<int>)null));
AssertExtensions.Throws<ArgumentNullException>("first", () => ((ParallelQuery<int>)null).SequenceEqual(ParallelEnumerable.Range(0, 1), EqualityComparer<int>.Default));
AssertExtensions.Throws<ArgumentNullException>("second", () => ParallelEnumerable.Range(0, 1).SequenceEqual((ParallelQuery<int>)null, EqualityComparer<int>.Default));
}
[Theory]
[MemberData(nameof(SequenceEqualData), new[] { 0, 1, 2, 16 })]
public static void SequenceEqual_DisposeException(Labeled<ParallelQuery<int>> left, Labeled<ParallelQuery<int>> right, int count)
{
_ = count;
ParallelQuery<int> leftQuery = left.Item;
ParallelQuery<int> rightQuery = right.Item;
AssertThrows.Wrapped<TestDisposeException>(() => leftQuery.SequenceEqual(new DisposeExceptionEnumerable<int>(rightQuery).AsParallel()));
AssertThrows.Wrapped<TestDisposeException>(() => new DisposeExceptionEnumerable<int>(leftQuery).AsParallel().SequenceEqual(rightQuery));
}
private class DisposeExceptionEnumerable<T> : IEnumerable<T>
{
private IEnumerable<T> _enumerable;
public DisposeExceptionEnumerable(IEnumerable<T> enumerable)
{
_enumerable = enumerable;
}
public IEnumerator<T> GetEnumerator()
{
return new DisposeExceptionEnumerator(_enumerable.GetEnumerator());
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
private class DisposeExceptionEnumerator : IEnumerator<T>
{
private IEnumerator<T> _enumerator;
public DisposeExceptionEnumerator(IEnumerator<T> enumerator)
{
_enumerator = enumerator;
}
public T Current
{
get { return _enumerator.Current; }
}
public void Dispose()
{
throw new TestDisposeException();
}
object IEnumerator.Current
{
get { return Current; }
}
public bool MoveNext()
{
return _enumerator.MoveNext();
}
public void Reset()
{
_enumerator.Reset();
}
}
}
private class TestDisposeException : Exception
{
}
}
}