Nuclex.Support/Source/Collections/PriorityQueue.Test.cs

79 lines
2.6 KiB
C#
Raw Normal View History

using System;
using System.Collections.Generic;
#if UNITTEST
using NUnit.Framework;
namespace Nuclex.Support.Collections {
/// <summary>Unit Test for the priority queue class</summary>
[TestFixture]
public class PriorityQueueTest {
/// <summary>Comparer for two floating point values</summary>
private class FloatComparer : IComparer<float> {
/// <summary>The default instance of this comparer</summary>
public static readonly FloatComparer Default = new FloatComparer();
/// <summary>Compares two floating points against each other</summary>
/// <param name="left">First float to compare</param>
/// <param name="right">Second float to compare</param>
/// <returns>The relationship of the two floats to each other</returns>
public int Compare(float left, float right) {
return Math.Sign(left - right);
}
}
/// <summary>Tests to ensure the count property is properly updated</summary>
[Test]
public void TestCount() {
PriorityQueue<float> testQueue = new PriorityQueue<float>(FloatComparer.Default);
Assert.AreEqual(0, testQueue.Count);
testQueue.Enqueue(12.34f);
Assert.AreEqual(1, testQueue.Count);
testQueue.Enqueue(56.78f);
Assert.AreEqual(2, testQueue.Count);
testQueue.Dequeue();
Assert.AreEqual(1, testQueue.Count);
testQueue.Enqueue(9.0f);
Assert.AreEqual(2, testQueue.Count);
testQueue.Clear();
Assert.AreEqual(0, testQueue.Count);
}
/// <summary>Tests to ensure that the priority collection actually sorts items</summary>
[Test]
public void TestOrdering() {
PriorityQueue<float> testQueue = new PriorityQueue<float>(FloatComparer.Default);
testQueue.Enqueue(1.0f);
testQueue.Enqueue(9.0f);
testQueue.Enqueue(2.0f);
testQueue.Enqueue(8.0f);
testQueue.Enqueue(3.0f);
testQueue.Enqueue(7.0f);
testQueue.Enqueue(4.0f);
testQueue.Enqueue(6.0f);
testQueue.Enqueue(5.0f);
Assert.AreEqual(9.0f, testQueue.Dequeue());
Assert.AreEqual(8.0f, testQueue.Dequeue());
Assert.AreEqual(7.0f, testQueue.Dequeue());
Assert.AreEqual(6.0f, testQueue.Dequeue());
Assert.AreEqual(5.0f, testQueue.Dequeue());
Assert.AreEqual(4.0f, testQueue.Dequeue());
Assert.AreEqual(3.0f, testQueue.Dequeue());
Assert.AreEqual(2.0f, testQueue.Dequeue());
Assert.AreEqual(1.0f, testQueue.Dequeue());
}
}
} // namespace Nuclex.Support.Collections
#endif // UNITTEST