106 lines
4.4 KiB
C#
106 lines
4.4 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 GammaA5B15
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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 TestGammaDistribution01()
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{
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var dist = new FastRng.Double.Distributions.GammaA5B15();
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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(0.0000929594237282).Within(0.0008));
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Assert.That(result[1], Is.EqualTo(0.0012801746797876).Within(0.002));
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Assert.That(result[2], Is.EqualTo(0.0055781488254349).Within(0.004));
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Assert.That(result[21], Is.EqualTo(0.9331608887752720).Within(0.09));
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Assert.That(result[22], Is.EqualTo(0.9594734828891280).Within(0.09));
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Assert.That(result[23], Is.EqualTo(0.9790895765535350).Within(0.09));
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Assert.That(result[50], Is.EqualTo(0.3478287795336570).Within(0.06));
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Assert.That(result[75], Is.EqualTo(0.0403399049422936).Within(0.009));
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Assert.That(result[85], Is.EqualTo(0.0163628388658126).Within(0.009));
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Assert.That(result[90], Is.EqualTo(0.0097147611446660).Within(0.005));
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Assert.That(result[97], Is.EqualTo(0.0041135143233153).Within(0.008));
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Assert.That(result[98], Is.EqualTo(0.0036872732029996).Within(0.008));
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Assert.That(result[99], Is.EqualTo(0.0033038503429554).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 TestGammaGeneratorWithRange03()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.GammaA5B15 { 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 TestGammaGeneratorWithRange01()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.GammaA5B15();
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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 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 TestGammaGeneratorWithRange02()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.GammaA5B15();
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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 NoRandomNumberGenerator01()
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{
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var dist = new FastRng.Double.Distributions.GammaA5B15();
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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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} |