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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.Tests
{
public static partial class RandomTests
{
[Fact]
public static void Empty_Span()
{
int seed = Environment.TickCount;
Random r = new Random(seed);
r.NextBytes(Span<byte>.Empty);
}
[Fact]
public static void Seeded_Span()
{
int seed = Environment.TickCount;
Random r1 = new Random(seed);
Random r2 = new Random(seed);
Span<byte> s1 = new Span<byte>(new byte[1000]);
r1.NextBytes(s1);
Span<byte> s2 = new Span<byte>(new byte[1000]);
r2.NextBytes(s2);
for (int i = 0; i < s1.Length; i++)
{
Assert.Equal(s1[i], s2[i]);
}
for (int i = 0; i < s1.Length; i++)
{
int x1 = r1.Next();
int x2 = r2.Next();
Assert.Equal(x1, x2);
}
}
[Fact]
public static void ExpectedValues_NextBytesSpan()
{
byte[][] expectedValues = ByteValues();
for (int seed = 0; seed < expectedValues.Length; seed++)
{
byte[] actualValues = new byte[expectedValues[seed].Length];
var r = new Random(seed);
r.NextBytes(new Span<byte>(actualValues));
Assert.Equal(expectedValues[seed], actualValues);
}
}
}
}
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