110 lines
4.4 KiB
C#
110 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 ChiSquareK4
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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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var dist = new FastRng.Double.Distributions.ChiSquareK4();
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var fqa = 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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{
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var value = await rng.NextNumber(dist);
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fqa.CountThis(value);
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}
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rng.StopProducer();
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var result = fqa.NormalizeAndPlotEvents(TestContext.WriteLine);
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Assert.That(result[0], Is.EqualTo(0.016417705906679).Within(0.02));
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Assert.That(result[1], Is.EqualTo(0.032671644513723).Within(0.02));
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Assert.That(result[2], Is.EqualTo(0.048763041010352).Within(0.02));
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Assert.That(result[21], Is.EqualTo(0.32518779111264).Within(0.05));
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Assert.That(result[22], Is.EqualTo(0.338273451612642).Within(0.05));
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Assert.That(result[23], Is.EqualTo(0.351220492939994).Within(0.05));
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Assert.That(result[50], Is.EqualTo(0.65209223303425).Within(0.05));
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Assert.That(result[75], Is.EqualTo(0.857562207152294).Within(0.08));
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Assert.That(result[85], Is.EqualTo(0.923072405412387).Within(0.08));
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Assert.That(result[90], Is.EqualTo(0.952623623874265).Within(0.08));
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Assert.That(result[97], Is.EqualTo(0.990616879396201).Within(0.08));
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Assert.That(result[98], Is.EqualTo(0.995734077068522).Within(0.08));
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Assert.That(result[99], Is.EqualTo(1.00077558852585).Within(0.1));
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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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var dist = new FastRng.Double.Distributions.ChiSquareK4();
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var rng = new MultiThreadedRng();
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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 TestChiSquareGeneratorWithRange02()
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{
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var dist = new FastRng.Double.Distributions.ChiSquareK4();
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var rng = new MultiThreadedRng();
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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 TestChiSquareGeneratorWithRange03()
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{
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var rng = new MultiThreadedRng();
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var dist = new FastRng.Double.Distributions.ChiSquareK4 { 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.ChiSquareK4();
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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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} |