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SingleSingleOrDefaultTests.cs
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SingleSingleOrDefaultTests.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.Generic;
using Xunit;
namespace System.Linq.Parallel.Tests
{
public static class SingleSingleOrDefaultTests
{
public static IEnumerable<object[]> SingleSpecificData(int[] counts)
{
foreach (int count in counts.DefaultIfEmpty(Sources.OuterLoopCount))
{
foreach (int position in new[] { 0, count / 2, Math.Max(0, count - 1) }.Distinct())
{
yield return new object[] { count, position };
}
}
}
//
// Single and SingleOrDefault
//
[Theory]
[InlineData(1)]
[InlineData("string")]
[InlineData((object)null)]
public static void Single<T>(T element)
{
Assert.Equal(element, ParallelEnumerable.Repeat(element, 1).Single());
Assert.Equal(element, ParallelEnumerable.Repeat(element, 1).Single(x => true));
}
[Theory]
[InlineData(1, 0)]
[InlineData("string", 0)]
[InlineData((object)null, 0)]
[InlineData(1, 1)]
[InlineData("string", 1)]
[InlineData((object)null, 1)]
public static void SingleOrDefault<T>(T element, int count)
{
Assert.Equal(count >= 1 ? element : default(T), ParallelEnumerable.Repeat(element, count).SingleOrDefault());
Assert.Equal(count >= 1 ? element : default(T), ParallelEnumerable.Repeat(element, count).SingleOrDefault(x => true));
}
[Fact]
public static void Single_Empty()
{
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Empty<int>().Single());
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Empty<int>().Single(x => true));
}
[Theory]
[InlineData(1)]
[InlineData(2)]
[InlineData(16)]
public static void Single_NoMatch(int count)
{
IntegerRangeSet seen = new IntegerRangeSet(0, count);
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, count).Single(x => !seen.Add(x)));
seen.AssertComplete();
}
[Fact]
[OuterLoop]
public static void Single_NoMatch_Longrunning()
{
Single_NoMatch(Sources.OuterLoopCount);
}
[Theory]
[InlineData(0)]
[InlineData(1)]
[InlineData(2)]
[InlineData(16)]
public static void SingleOrDefault_NoMatch(int count)
{
IntegerRangeSet seen = new IntegerRangeSet(0, count);
Assert.Equal(default(int), ParallelEnumerable.Range(0, count).SingleOrDefault(x => !seen.Add(x)));
seen.AssertComplete();
}
[Fact]
[OuterLoop]
public static void SingleOrDefault_NoMatch_Longrunning()
{
SingleOrDefault_NoMatch(Sources.OuterLoopCount);
}
[Theory]
[InlineData(2)]
[InlineData(16)]
public static void Single_AllMatch(int count)
{
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, count).Single(x => true));
}
[Fact]
[OuterLoop]
public static void Single_AllMatch_Longrunning()
{
Single_AllMatch(Sources.OuterLoopCount);
}
[Theory]
[InlineData(2)]
[InlineData(16)]
public static void SingleOrDefault_AllMatch(int count)
{
Assert.Throws<InvalidOperationException>(() => ParallelEnumerable.Range(0, count).SingleOrDefault(x => true));
}
[Fact]
[OuterLoop]
public static void SingleOrDefault_AllMatch_Longrunning()
{
SingleOrDefault_AllMatch(Sources.OuterLoopCount);
}
[Theory]
[MemberData(nameof(SingleSpecificData), new[] { 1, 2, 16 })]
public static void Single_OneMatch(int count, int element)
{
IntegerRangeSet seen = new IntegerRangeSet(0, count);
Assert.Equal(element, ParallelEnumerable.Range(0, count).Single(x => seen.Add(x) && x == element));
seen.AssertComplete();
}
[Theory]
[OuterLoop]
[MemberData(nameof(SingleSpecificData), new int[] { /* Sources.OuterLoopCount */ })]
public static void Single_OneMatch_Longrunning(int count, int element)
{
Single_OneMatch(count, element);
}
[Theory]
[MemberData(nameof(SingleSpecificData), new[] { 0, 1, 2, 16 })]
public static void SingleOrDefault_OneMatch(int count, int element)
{
IntegerRangeSet seen = new IntegerRangeSet(0, count);
Assert.Equal(element, ParallelEnumerable.Range(0, count).SingleOrDefault(x => seen.Add(x) && x == element));
seen.AssertComplete();
}
[Theory]
[OuterLoop]
[MemberData(nameof(SingleSpecificData), new int[] { /* Sources.OuterLoopCount */ })]
public static void SingleOrDefault_OneMatch_Longrunning(int count, int element)
{
SingleOrDefault_OneMatch(count, element);
}
[Fact]
public static void Single_OperationCanceledException()
{
AssertThrows.EventuallyCanceled((source, canceler) => source.Single(x => { canceler(); return false; }));
}
[Fact]
public static void SingleOrDefault_OperationCanceledException()
{
AssertThrows.EventuallyCanceled((source, canceler) => source.SingleOrDefault(x => { canceler(); return false; }));
}
[Fact]
public static void Single_AggregateException_Wraps_OperationCanceledException()
{
AssertThrows.OtherTokenCanceled((source, canceler) => source.Single(x => { canceler(); return false; }));
AssertThrows.SameTokenNotCanceled((source, canceler) => source.Single(x => { canceler(); return false; }));
}
[Fact]
public static void SingleOrDefault_AggregateException_Wraps_OperationCanceledException()
{
AssertThrows.OtherTokenCanceled((source, canceler) => source.SingleOrDefault(x => { canceler(); return false; }));
AssertThrows.SameTokenNotCanceled((source, canceler) => source.SingleOrDefault(x => { canceler(); return false; }));
}
[Fact]
public static void Single_OperationCanceledException_PreCanceled()
{
AssertThrows.AlreadyCanceled(source => source.Single());
AssertThrows.AlreadyCanceled(source => source.Single(x => true));
}
[Fact]
public static void SingleOrDefault_OperationCanceledException_PreCanceled()
{
AssertThrows.AlreadyCanceled(source => source.SingleOrDefault());
AssertThrows.AlreadyCanceled(source => source.SingleOrDefault(x => true));
}
[Fact]
public static void Single_AggregateException()
{
AssertThrows.Wrapped<DeliberateTestException>(() => ParallelEnumerable.Range(0, 1).Single(x => { throw new DeliberateTestException(); }));
AssertThrows.Wrapped<DeliberateTestException>(() => ParallelEnumerable.Range(0, 1).SingleOrDefault(x => { throw new DeliberateTestException(); }));
}
[Fact]
public static void Single_ArgumentNullException()
{
AssertExtensions.Throws<ArgumentNullException>("source", () => ((ParallelQuery<bool>)null).Single());
AssertExtensions.Throws<ArgumentNullException>("source", () => ((ParallelQuery<bool>)null).SingleOrDefault());
AssertExtensions.Throws<ArgumentNullException>("predicate", () => ParallelEnumerable.Empty<int>().Single(null));
AssertExtensions.Throws<ArgumentNullException>("predicate", () => ParallelEnumerable.Empty<int>().SingleOrDefault(null));
}
}
}