110 lines
4.5 KiB
C#
110 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 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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var dist = new FastRng.Double.Distributions.ChiSquareK10();
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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(0.0000000164021588).Within(0.0000002));
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Assert.That(result[1], Is.EqualTo(0.0000002611256437).Within(0.000003));
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Assert.That(result[2], Is.EqualTo(0.0000013153553250).Within(0.00002));
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Assert.That(result[21], Is.EqualTo(0.003459320622874).Within(0.005));
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Assert.That(result[22], Is.EqualTo(0.004111875573379).Within(0.005));
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Assert.That(result[23], Is.EqualTo(0.004850674298859).Within(0.005));
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Assert.That(result[50], Is.EqualTo(0.086418773275056).Within(0.05));
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Assert.That(result[75], Is.EqualTo(0.376092741436046).Within(0.08));
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Assert.That(result[85], Is.EqualTo(0.586569751611096).Within(0.08));
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Assert.That(result[90], Is.EqualTo(0.717189736168766).Within(0.08));
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Assert.That(result[97], Is.EqualTo(0.931477764640217).Within(0.08));
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Assert.That(result[98], Is.EqualTo(0.965244855212136).Within(0.08));
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Assert.That(result[99], Is.EqualTo(0.999827884370044).Within(0.08));
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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.ChiSquareK10();
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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.ChiSquareK10();
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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.ChiSquareK10 { 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.ChiSquareK10();
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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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} |