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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.
// See the LICENSE file in the project root for more information.
// NOTE: This code is derived from an implementation originally in dotnet/runtime:
// https://github.com/dotnet/runtime/blob/v8.0.3/src/libraries/System.Collections/tests/Generic/List/List.Generic.Tests.cs
//
// See the commentary in https://github.com/dotnet/roslyn/pull/50156 for notes on incorporating changes made to the
// reference implementation.
using System;
using System.Collections.Generic;
using Microsoft.CodeAnalysis.Collections;
using Xunit;
namespace Microsoft.CodeAnalysis.UnitTests.Collections
{
/// <summary>
/// Contains tests that ensure the correctness of the List class.
/// </summary>
public abstract partial class SegmentedList_Generic_Tests<T> : IList_Generic_Tests<T>
where T : notnull
{
#region IList<T> Helper Methods
protected override bool Enumerator_Empty_UsesSingletonInstance => true;
protected override bool Enumerator_Empty_Current_UndefinedOperation_Throws => false;
protected override bool Enumerator_Empty_ModifiedDuringEnumeration_ThrowsInvalidOperationException => false;
protected override IList<T> GenericIListFactory()
{
return GenericListFactory();
}
protected override IList<T> GenericIListFactory(int count)
{
return GenericListFactory(count);
}
#endregion
#region List<T> Helper Methods
private protected virtual SegmentedList<T> GenericListFactory()
{
return new SegmentedList<T>();
}
private protected virtual SegmentedList<T> GenericListFactory(int count)
{
IEnumerable<T> toCreateFrom = CreateEnumerable(EnumerableType.List, null, count, 0, 0);
return new SegmentedList<T>(toCreateFrom);
}
private protected void VerifyList(SegmentedList<T> list, SegmentedList<T> expectedItems)
{
Assert.Equal(expectedItems.Count, list.Count);
//Only verify the indexer. List should be in a good enough state that we
//do not have to verify consistency with any other method.
for (int i = 0; i < list.Count; ++i)
{
Assert.True(list[i] == null ? expectedItems[i] == null : list[i].Equals(expectedItems[i]));
}
}
#endregion
[Theory]
[MemberData(nameof(ValidCollectionSizes))]
public void CopyTo_ArgumentValidity(int count)
{
SegmentedList<T> list = GenericListFactory(count);
Assert.Throws<ArgumentException>(null, () => list.CopyTo(0, new T[0], 0, count + 1));
Assert.Throws<ArgumentException>(null, () => list.CopyTo(count, new T[0], 0, 1));
}
}
}
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