84 lines
3.3 KiB
C#
84 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.Float;
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using NUnit.Framework;
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namespace FastRngTests.Float.Distributions
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{
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[ExcludeFromCodeCoverage]
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public class BetaA5B2
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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 TestBetaDistribution01()
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{
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using var rng = new MultiThreadedRng();
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var dist = new FastRng.Float.Distributions.BetaA5B2(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(0.0000001f).Within(0.0000003f));
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Assert.That(result[1], Is.EqualTo(0.0000019f).Within(0.00001f));
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Assert.That(result[2], Is.EqualTo(0.0000096f).Within(0.0004f));
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Assert.That(result[21], Is.EqualTo(0.0222918f).Within(0.03f));
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Assert.That(result[22], Is.EqualTo(0.0262883f).Within(0.03f));
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Assert.That(result[23], Is.EqualTo(0.0307623f).Within(0.03f));
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Assert.That(result[50], Is.EqualTo(0.4044237f).Within(0.2f));
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Assert.That(result[75], Is.EqualTo(0.9768445f).Within(0.15f));
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Assert.That(result[85], Is.EqualTo(0.9552714f).Within(0.15f));
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Assert.That(result[90], Is.EqualTo(0.8004420f).Within(0.35f));
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Assert.That(result[97], Is.EqualTo(0.2250578f).Within(0.03f));
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Assert.That(result[98], Is.EqualTo(0.1171927f).Within(0.03f));
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Assert.That(result[99], Is.EqualTo(0f).Within(0.0004f));
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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 TestBetaGeneratorWithRange01()
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{
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using var rng = new MultiThreadedRng();
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var samples = new float[1_000];
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var dist = new FastRng.Float.Distributions.BetaA5B2(rng);
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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 TestBetaGeneratorWithRange02()
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{
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using var rng = new MultiThreadedRng();
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var samples = new float[1_000];
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var dist = new FastRng.Float.Distributions.BetaA5B2(rng);
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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.Float.Distributions.BetaA5B2(null));
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}
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}
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} |