84 lines
3.4 KiB
C#
84 lines
3.4 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 StudentTNu1
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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 TestStudentTDistribution01()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.StudentTNu1(rng);
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var fra = new FrequencyAnalysis();
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for (var n = 0; n < 100_000; n++)
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fra.CountThis(await dist.NextNumber());
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var result = fra.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(1.000000000).Within(0.2));
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Assert.That(result[1], Is.EqualTo(0.999700120).Within(0.2));
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Assert.That(result[2], Is.EqualTo(0.999200719).Within(0.2));
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Assert.That(result[21], Is.EqualTo(0.953929798).Within(0.2));
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Assert.That(result[22], Is.EqualTo(0.949852788).Within(0.2));
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Assert.That(result[23], Is.EqualTo(0.945631619).Within(0.2));
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Assert.That(result[50], Is.EqualTo(0.793667169).Within(0.095));
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Assert.That(result[75], Is.EqualTo(0.633937627).Within(0.09));
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Assert.That(result[85], Is.EqualTo(0.574902276).Within(0.09));
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Assert.That(result[90], Is.EqualTo(0.547070729).Within(0.09));
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Assert.That(result[97], Is.EqualTo(0.510150990).Within(0.09));
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Assert.That(result[98], Is.EqualTo(0.505075501).Within(0.09));
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Assert.That(result[99], Is.EqualTo(0.500050000).Within(0.09));
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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 TestStudentTGeneratorWithRange01()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.StudentTNu1(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 TestStudentTGeneratorWithRange02()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.StudentTNu1(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.StudentTNu1(null));
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}
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}
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} |