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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 System;
- using System.Linq;
- using Xunit;
- namespace Tests
- {
- public class Buffer : 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>([1], 0));
- AssertThrows<ArgumentOutOfRangeException>(() => EnumerableEx.Buffer<int>([1], 5, 0));
- AssertThrows<ArgumentOutOfRangeException>(() => EnumerableEx.Buffer<int>([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([0, 1, 2]));
- Assert.True(res[1].SequenceEqual([3, 4, 5]));
- Assert.True(res[2].SequenceEqual([6, 7, 8]));
- Assert.True(res[3].SequenceEqual([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([0, 1, 2, 3, 4]));
- Assert.True(res[1].SequenceEqual([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([0, 1, 2]));
- Assert.True(res[1].SequenceEqual([2, 3, 4]));
- Assert.True(res[2].SequenceEqual([4, 5, 6]));
- Assert.True(res[3].SequenceEqual([6, 7, 8]));
- Assert.True(res[4].SequenceEqual([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([0, 1, 2]));
- Assert.True(res[1].SequenceEqual([4, 5, 6]));
- Assert.True(res[2].SequenceEqual([8, 9]));
- }
- }
- }
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