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BufferTest.cs
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BufferTest.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 Apache 2.0 License.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Xunit;
namespace Tests
{
public class BufferTest : Tests
{
[Fact]
public void Buffer_Arguments()
{
AssertThrows<ArgumentNullException>(() => EnumerableEx.Buffer<int>(null, 5));
AssertThrows<ArgumentNullException>(() => EnumerableEx.Buffer<int>(null, 5, 3));
AssertThrows<ArgumentOutOfRangeException>(() => EnumerableEx.Buffer<int>(new[] { 1 }, 0));
AssertThrows<ArgumentOutOfRangeException>(() => EnumerableEx.Buffer<int>(new[] { 1 }, 5, 0));
AssertThrows<ArgumentOutOfRangeException>(() => EnumerableEx.Buffer<int>(new[] { 1 }, 0, 3));
}
[Fact]
public void Buffer1()
{
var rng = Enumerable.Range(0, 10);
var res = rng.Buffer(3).ToList();
Assert.Equal(4, res.Count);
Assert.True(res[0].SequenceEqual(new[] { 0, 1, 2 }));
Assert.True(res[1].SequenceEqual(new[] { 3, 4, 5 }));
Assert.True(res[2].SequenceEqual(new[] { 6, 7, 8 }));
Assert.True(res[3].SequenceEqual(new[] { 9 }));
}
[Fact]
public void Buffer2()
{
var rng = Enumerable.Range(0, 10);
var res = rng.Buffer(5).ToList();
Assert.Equal(2, res.Count);
Assert.True(res[0].SequenceEqual(new[] { 0, 1, 2, 3, 4 }));
Assert.True(res[1].SequenceEqual(new[] { 5, 6, 7, 8, 9 }));
}
[Fact]
public void Buffer3()
{
var rng = Enumerable.Empty<int>();
var res = rng.Buffer(5).ToList();
Assert.Empty(res);
}
[Fact]
public void Buffer4()
{
var rng = Enumerable.Range(0, 10);
var res = rng.Buffer(3, 2).ToList();
Assert.Equal(5, res.Count);
Assert.True(res[0].SequenceEqual(new[] { 0, 1, 2 }));
Assert.True(res[1].SequenceEqual(new[] { 2, 3, 4 }));
Assert.True(res[2].SequenceEqual(new[] { 4, 5, 6 }));
Assert.True(res[3].SequenceEqual(new[] { 6, 7, 8 }));
Assert.True(res[4].SequenceEqual(new[] { 8, 9 }));
}
[Fact]
public void Buffer5()
{
var rng = Enumerable.Range(0, 10);
var res = rng.Buffer(3, 4).ToList();
Assert.Equal(3, res.Count);
Assert.True(res[0].SequenceEqual(new[] { 0, 1, 2 }));
Assert.True(res[1].SequenceEqual(new[] { 4, 5, 6 }));
Assert.True(res[2].SequenceEqual(new[] { 8, 9 }));
}
}
}