86 lines
3.3 KiB
C#
86 lines
3.3 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;
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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 ChiSquareK10
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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 TestChiSquareDistribution01()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.ChiSquareK10<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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{
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var value = await dist.NextNumber();
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fqa.CountThis(value);
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}
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var result = fqa.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(0.0000000164021588f).Within(0.0000002f));
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Assert.That(result[1], Is.EqualTo(0.0000002611256437f).Within(0.000003f));
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Assert.That(result[2], Is.EqualTo(0.0000013153553250f).Within(0.00002f));
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Assert.That(result[21], Is.EqualTo(0.003459320622874f).Within(0.005f));
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Assert.That(result[22], Is.EqualTo(0.004111875573379f).Within(0.005f));
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Assert.That(result[23], Is.EqualTo(0.004850674298859f).Within(0.005f));
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Assert.That(result[50], Is.EqualTo(0.086418773275056f).Within(0.05f));
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Assert.That(result[75], Is.EqualTo(0.376092741436046f).Within(0.08f));
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Assert.That(result[85], Is.EqualTo(0.586569751611096f).Within(0.08f));
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Assert.That(result[90], Is.EqualTo(0.717189736168766f).Within(0.08f));
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Assert.That(result[97], Is.EqualTo(0.931477764640217f).Within(0.08f));
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Assert.That(result[98], Is.EqualTo(0.965244855212136f).Within(0.08f));
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Assert.That(result[99], Is.EqualTo(0.999827884370044f).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 async Task TestChiSquareGeneratorWithRange01()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.ChiSquareK10<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] = await 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 async Task TestChiSquareGeneratorWithRange02()
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{
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using var rng = new MultiThreadedRng<float>();
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var dist = new FastRng.Distributions.ChiSquareK10<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] = await 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.ChiSquareK10<float>(null));
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}
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} |