82 lines
3.2 KiB
C#
82 lines
3.2 KiB
C#
using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using FastRng;
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using NUnit.Framework;
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namespace FastRngTests.Distributions;
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[ExcludeFromCodeCoverage]
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public class InverseExponentialLa5
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{
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[Test]
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[Category(TestCategories.COVER)]
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[Category(TestCategories.NORMAL)]
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public void TestExponentialDistribution01()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.InverseExponentialLa5<float>(rng);
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var fqa = new FrequencyAnalysis();
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for (var n = 0; n < 100_000; n++)
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fqa.CountThis(dist.NextNumber());
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var result = fqa.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(0.007083408929052f).Within(0.008f));
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Assert.That(result[1], Is.EqualTo(0.007446583070924f).Within(0.008f));
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Assert.That(result[2], Is.EqualTo(0.007828377549226f).Within(0.008f));
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Assert.That(result[21], Is.EqualTo(0.020241911445804f).Within(0.05f));
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Assert.That(result[22], Is.EqualTo(0.021279736438377f).Within(0.05f));
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Assert.That(result[23], Is.EqualTo(0.022370771856166f).Within(0.05f));
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Assert.That(result[50], Is.EqualTo(0.08629358649937f).Within(0.02f));
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Assert.That(result[75], Is.EqualTo(0.301194211912202f).Within(0.03f));
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Assert.That(result[85], Is.EqualTo(0.496585303791409f).Within(0.05f));
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Assert.That(result[90], Is.EqualTo(0.637628151621772f).Within(0.06f));
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Assert.That(result[97], Is.EqualTo(0.904837418035959f).Within(0.08f));
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Assert.That(result[98], Is.EqualTo(0.951229424500713f).Within(0.08f));
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Assert.That(result[99], Is.EqualTo(1f).Within(0.08f));
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}
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[Test]
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[Category(TestCategories.COVER)]
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[Category(TestCategories.NORMAL)]
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public void TestExponentialGeneratorWithRange01()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.InverseExponentialLa5<float>(rng);
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var samples = new float[1_000];
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for (var n = 0; n < samples.Length; n++)
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samples[n] = dist.NextNumber(-1.0f, 1.0f);
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Assert.That(samples.Min(), Is.GreaterThanOrEqualTo(-1.0f), "Min out of range");
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Assert.That(samples.Max(), Is.LessThanOrEqualTo(1.0f), "Max out of range");
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}
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[Test]
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[Category(TestCategories.COVER)]
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[Category(TestCategories.NORMAL)]
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public void TestExponentialGeneratorWithRange02()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.InverseExponentialLa5<float>(rng);
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var samples = new float[1_000];
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for (var n = 0; n < samples.Length; n++)
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samples[n] = dist.NextNumber(0.0f, 1.0f);
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Assert.That(samples.Min(), Is.GreaterThanOrEqualTo(0.0f), "Min is out of range");
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Assert.That(samples.Max(), Is.LessThanOrEqualTo(1.0f), "Max is out of range");
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}
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[Test]
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[Category(TestCategories.COVER)]
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[Category(TestCategories.NORMAL)]
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public void NoRandomNumberGenerator01()
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{
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Assert.Throws<ArgumentNullException>(() => new FastRng.Distributions.InverseExponentialLa5<float>(null));
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}
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} |