84 lines
3.5 KiB
C#
84 lines
3.5 KiB
C#
using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Threading.Tasks;
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using FastRng.Double;
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using NUnit.Framework;
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namespace FastRngTests.Double.Distributions
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{
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[ExcludeFromCodeCoverage]
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public class ExponentialLa5
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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 async Task TestExponentialDistribution01()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.ExponentialLa5(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(await dist.NextNumber());
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var result = fqa.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(1.0002177398625).Within(0.05));
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Assert.That(result[1], Is.EqualTo(0.951436545064811).Within(0.05));
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Assert.That(result[2], Is.EqualTo(0.905034437210948).Within(0.05));
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Assert.That(result[21], Is.EqualTo(0.35001394450853).Within(0.05));
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Assert.That(result[22], Is.EqualTo(0.332943563002074).Within(0.05));
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Assert.That(result[23], Is.EqualTo(0.31670571382568).Within(0.05));
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Assert.That(result[50], Is.EqualTo(0.082102871800213).Within(0.01));
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Assert.That(result[75], Is.EqualTo(0.023522866606758).Within(0.01));
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Assert.That(result[85], Is.EqualTo(0.014267339801329).Within(0.01));
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Assert.That(result[90], Is.EqualTo(0.011111415409621).Within(0.01));
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Assert.That(result[97], Is.EqualTo(0.007830082099077).Within(0.008));
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Assert.That(result[98], Is.EqualTo(0.007448204488898).Within(0.008));
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Assert.That(result[99], Is.EqualTo(0.007084951269538).Within(0.008));
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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 async Task TestExponentialGeneratorWithRange01()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.ExponentialLa5(rng);
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var samples = new double[1_000];
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for (var n = 0; n < samples.Length; n++)
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samples[n] = await dist.NextNumber(-1.0, 1.0);
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Assert.That(samples.Min(), Is.GreaterThanOrEqualTo(-1.0), "Min out of range");
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Assert.That(samples.Max(), Is.LessThanOrEqualTo(1.0), "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 async Task TestExponentialGeneratorWithRange02()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.ExponentialLa5(rng);
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var samples = new double[1_000];
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for (var n = 0; n < samples.Length; n++)
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samples[n] = await dist.NextNumber(0.0, 1.0);
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Assert.That(samples.Min(), Is.GreaterThanOrEqualTo(0.0), "Min is out of range");
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Assert.That(samples.Max(), Is.LessThanOrEqualTo(1.0), "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.Double.Distributions.ExponentialLa5(null));
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}
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}
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} |