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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.
using Xunit;
namespace System.SpanTests
{
public static partial class ReadOnlySpanTests
{
[Fact]
public static void IntArrayAsReadOnlySpan()
{
int[] a = { 19, -17 };
ReadOnlySpan<int> spanInt = a.AsReadOnlySpan();
spanInt.Validate(19, -17);
}
[Fact]
public static void LongArrayAsReadOnlySpan()
{
long[] b = { 1, -3, 7, -15, 31 };
ReadOnlySpan<long> spanLong = b.AsReadOnlySpan();
spanLong.Validate(1, -3, 7, -15, 31);
}
[ActiveIssue(23952, TargetFrameworkMonikers.UapAot)]
[Fact]
public static void ObjectArrayAsReadOnlySpan()
{
object o1 = new object();
object o2 = new object();
object[] c = { o1, o2 };
ReadOnlySpan<object> spanObject = c.AsReadOnlySpan();
spanObject.ValidateReferenceType(o1, o2);
}
[Fact]
public static void NullArrayAsReadOnlySpan()
{
int[] a = null;
ReadOnlySpan<int> span;
TestHelpers.AssertThrows<ArgumentNullException, int>(span, _span => _span = a.AsReadOnlySpan());
}
[Fact]
public static void EmptyArrayAsReadOnlySpan()
{
int[] empty = Array.Empty<int>();
ReadOnlySpan<int> span = empty.AsReadOnlySpan();
span.Validate();
}
[Fact]
public static void IntArraySegmentAsSpan()
{
int[] a = { 19, -17 };
ArraySegment<int> segmentInt = new ArraySegment<int>(a, 1, 1);
ReadOnlySpan<int> spanInt = segmentInt.AsReadOnlySpan();
spanInt.Validate(-17);
}
[Fact]
public static void LongArraySegmentAsSpan()
{
long[] b = { 1, -3, 7, -15, 31 };
ArraySegment<long> segmentLong = new ArraySegment<long>(b, 1, 3);
ReadOnlySpan<long> spanLong = segmentLong.AsReadOnlySpan();
spanLong.Validate(-3, 7, -15);
}
[ActiveIssue(23952, TargetFrameworkMonikers.UapAot)]
[Fact]
public static void ObjectArraySegmentAsSpan()
{
object o1 = new object();
object o2 = new object();
object o3 = new object();
object o4 = new object();
object[] c = { o1, o2, o3, o4 };
ArraySegment<object> segmentObject = new ArraySegment<object>(c, 0, 2);
ReadOnlySpan<object> spanObject = segmentObject.AsReadOnlySpan();
spanObject.ValidateReferenceType(o1, o2);
}
[Fact]
public static void ZeroLengthArraySegmentAsReadOnlySpan()
{
int[] empty = Array.Empty<int>();
ArraySegment<int> emptySegment = new ArraySegment<int>(empty);
ReadOnlySpan<int> span = emptySegment.AsReadOnlySpan();
span.Validate();
int[] a = { 19, -17 };
ArraySegment<int> segmentInt = new ArraySegment<int>(a, 1, 0);
ReadOnlySpan<int> spanInt = segmentInt.AsReadOnlySpan();
spanInt.Validate();
}
[Fact]
public static void StringAsReadOnlySpanNullary()
{
string s = "Hello";
ReadOnlySpan<char> span = s.AsReadOnlySpan();
char[] expected = s.ToCharArray();
span.Validate(expected);
}
[Fact]
public static void StringAsReadOnlySpanEmptyString()
{
string s = "";
ReadOnlySpan<char> span = s.AsReadOnlySpan();
char[] expected = s.ToCharArray();
span.Validate(expected);
}
[Fact]
public static void StringAsReadOnlySpanNullChecked()
{
string s = null;
Assert.Throws<ArgumentNullException>(() => s.AsReadOnlySpan().DontBox());
}
}
}
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