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B3ni
2025-07-06 00:23:46 +02:00
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Nitrox.Test/Model/DataStructures/CircularBufferTest.cs Normal file
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using FluentAssertions;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace NitroxModel.DataStructures;
[TestClass]
public class CircularBufferTest
{
[TestMethod]
public void ShouldLimitSizeToMaxSize()
{
CircularBuffer<string> buffer = new(1);
buffer.Count.Should().Be(0);
buffer.Add("1");
buffer.Count.Should().Be(1);
buffer.Add("2");
buffer.Count.Should().Be(1);
buffer = new CircularBuffer<string>(5);
buffer.Count.Should().Be(0);
buffer.Add("1");
buffer.Count.Should().Be(1);
buffer.Add("2");
buffer.Count.Should().Be(2);
buffer.Add("3");
buffer.Count.Should().Be(3);
buffer.Add("4");
buffer.Count.Should().Be(4);
buffer.Add("5");
buffer.Count.Should().Be(5);
buffer.Add("6");
buffer.Count.Should().Be(5);
}
[TestMethod]
public void ShouldOverwriteOldestItemInBufferWhenCapped()
{
CircularBuffer<string> buffer = new(3);
buffer.Add("1");
buffer[0].Should().Be("1");
buffer.Add("2");
buffer[1].Should().Be("2");
buffer.Add("3");
buffer[2].Should().Be("3");
buffer.Add("4");
buffer[0].Should().Be("4");
buffer.Add("5");
buffer[1].Should().Be("5");
buffer[2].Should().Be("3");
buffer.Add("6");
buffer[2].Should().Be("6");
buffer.Add("7");
buffer.Should().ContainInOrder("7", "5", "6");
}
[TestMethod]
public void ShouldDiscardAddIfCapacityReached()
{
CircularBuffer<string> buffer = new(0);
buffer.Count.Should().Be(0);
buffer.Add("1");
buffer.Count.Should().Be(0);
}
[TestMethod]
public void ShouldBeEmptyWhenCleared()
{
CircularBuffer<string> buffer = new(10);
buffer.Count.Should().Be(0);
buffer.Add("1");
buffer.Add("1");
buffer.Add("1");
buffer.Count.Should().Be(3);
buffer.Clear();
buffer.Count.Should().Be(0);
}
[TestMethod]
public void ShouldGiveLastChanged()
{
CircularBuffer<int> buffer = new(3);
buffer.LastChangedIndex.Should().Be(-1);
buffer.Add(1);
buffer.LastChangedIndex.Should().Be(0);
buffer.Add(2);
buffer.LastChangedIndex.Should().Be(1);
buffer.Add(3);
buffer.LastChangedIndex.Should().Be(2);
buffer.Add(4);
buffer.LastChangedIndex.Should().Be(0);
buffer.Add(5);
buffer.LastChangedIndex.Should().Be(1);
buffer.Add(6);
buffer.LastChangedIndex.Should().Be(2);
buffer.Add(7);
buffer.LastChangedIndex.Should().Be(0);
buffer.Add(8);
buffer.LastChangedIndex.Should().Be(1);
buffer.Clear();
buffer.LastChangedIndex.Should().Be(-1);
}
[TestMethod]
public void ShouldReverseOrderWithNegativeIndex()
{
CircularBuffer<int> buffer = new(6);
buffer.AddRange(1, 2, 3, 4, 5, 6);
buffer[-1].Should().Be(6);
buffer[-2].Should().Be(5);
buffer[-3].Should().Be(4);
buffer[-4].Should().Be(3);
buffer[-5].Should().Be(2);
buffer[-6].Should().Be(1);
buffer[-7].Should().Be(6);
buffer[-8].Should().Be(5);
}
}