106 lines
4.5 KiB
C#
106 lines
4.5 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 InverseGammaA3B05
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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 TestInverseGammaDistribution01()
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{
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var dist = new FastRng.Double.Distributions.InverseGammaA3B05();
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var fra = new FrequencyAnalysis();
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var rng = new MultiThreadedRng();
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for (var n = 0; n < 100_000; n++)
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fra.CountThis(await rng.NextNumber(dist));
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rng.StopProducer();
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var result = fra.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(0.0000000000000003).Within(0.0000001));
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Assert.That(result[1], Is.EqualTo(0.0000011605257228).Within(0.00001));
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Assert.That(result[2], Is.EqualTo(0.0009536970016103).Within(0.0015));
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Assert.That(result[21], Is.EqualTo(0.5880485243048120).Within(0.05));
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Assert.That(result[22], Is.EqualTo(0.5433842148912880).Within(0.05));
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Assert.That(result[23], Is.EqualTo(0.5017780549216030).Within(0.05));
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Assert.That(result[50], Is.EqualTo(0.0741442015957425).Within(0.009));
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Assert.That(result[75], Is.EqualTo(0.0207568945092484).Within(0.006));
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Assert.That(result[85], Is.EqualTo(0.0136661506653688).Within(0.006));
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Assert.That(result[90], Is.EqualTo(0.0112550619601327).Within(0.006));
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Assert.That(result[97], Is.EqualTo(0.0087026933539773).Within(0.005));
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Assert.That(result[98], Is.EqualTo(0.0083995375385004).Within(0.005));
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Assert.That(result[99], Is.EqualTo(0.0081094156379928).Within(0.005));
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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 TestInverseGammaGeneratorWithRange01()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.InverseGammaA3B05();
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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 rng.NextNumber(-1.0, 1.0, dist);
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rng.StopProducer();
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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 TestInverseGammaGeneratorWithRange02()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.InverseGammaA3B05();
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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 rng.NextNumber(0.0, 1.0, dist);
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rng.StopProducer();
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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 async Task TestInverseGammaGeneratorWithRange03()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.InverseGammaA3B05 { Random = rng }; // Test default parameters
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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.GetDistributedValue();
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rng.StopProducer();
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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 async Task NoRandomNumberGenerator01()
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{
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var dist = new FastRng.Double.Distributions.InverseGammaA3B05();
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Assert.DoesNotThrowAsync(async () => await dist.GetDistributedValue());
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Assert.That(await dist.GetDistributedValue(), Is.NaN);
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}
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}
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} |