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1.0.17
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‎Directory.Build.props‎

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</PropertyGroup>
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<PropertyGroup>
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<VersionPrefix>1.0.16</VersionPrefix>
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<LangVersion>10.0</LangVersion>
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<VersionPrefix>1.0.17</VersionPrefix>
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<LangVersion>11</LangVersion>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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</Project>

‎Generate-ReleaseNotes.bat‎

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rem https://github.com/StefH/GitHubReleaseNotes
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SET version=1.0.16
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SET version=1.0.17
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GitHubReleaseNotes --output ReleaseNotes.md --skip-empty-releases --exclude-labels question invalid doc --version %version% --token %GH_TOKEN%

‎ReleaseNotes.md‎

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# 1.0.17 (30 November 2022)
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- [#26](https://github.com/StefH/RandomDataGenerator/pull/26) - Fix for non-uniform random value generators [bug] contributed by [DarekDan](https://github.com/DarekDan)
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- [#25](https://github.com/StefH/RandomDataGenerator/issues/25) - Location generator distribution seems to be a bit skewed [bug]
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# 1.0.16 (03 August 2022)
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- [#22](https://github.com/StefH/RandomDataGenerator/pull/22) - Use static RandomValueGenerator [feature] contributed by [StefH](https://github.com/StefH)
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‎tests/RandomDataGenerator.Tests/CityRandomizerTests.cs‎

Lines changed: 70 additions & 67 deletions
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using RandomDataGenerator.Randomizers;
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using Xunit.Abstractions;
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namespace RandomDataGenerator.Tests
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namespace RandomDataGenerator.Tests;
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public class CityRandomizerTests
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{
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public class CityRandomizerTests
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{
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private readonly ITestOutputHelper _output;
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static readonly Random random = new System.Random(420);
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static readonly object randLock = new object();
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private readonly ITestOutputHelper _output;
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private static readonly Random Random = new(420);
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private static readonly object RandLock = new();
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public CityRandomizerTests(ITestOutputHelper output)
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{
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_output = output;
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}
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[Theory]
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[InlineData(1)]
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[InlineData(2)]
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[InlineData(4)]
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[InlineData(8)]
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public void CityDistributionMustBeUniform(int degree)
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{
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var locationGenerator = RandomizerFactory.GetRandomizer(new FieldOptionsCity { ValueAsString = true, UseNullValues = false });
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var concurrentDictionary = new ConcurrentDictionary<string, long>();
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var options = new ParallelOptions { MaxDegreeOfParallelism = degree };
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Parallel.For(0, 1000, options, i =>
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{
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Parallel.For(0, 1000, options, j =>
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{
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var location = locationGenerator.Generate();
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concurrentDictionary.AddOrUpdate(location, _ => 1, (k, v) => v + 1);
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});
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});
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var topCount = concurrentDictionary.OrderByDescending(pair => pair.Value).First();
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var bottomCount = concurrentDictionary.OrderBy(pair => pair.Value).First();
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_output.WriteLine($"{topCount}");
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_output.WriteLine($"{bottomCount}");
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Assert.True(topCount.Value / bottomCount.Value < 2);
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Assert.NotEqual(topCount.Key, bottomCount.Key);
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}
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public CityRandomizerTests(ITestOutputHelper output)
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{
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this._output = output;
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}
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[Fact]
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public void TwoRandomCitiesMustNotBeTheSame()
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{
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var locationGenerator = RandomizerFactory.GetRandomizer(new FieldOptionsCity { ValueAsString = true, UseNullValues = false });
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var locationOne = locationGenerator.Generate();
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var locationTwo = locationGenerator.Generate();
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Assert.NotEqual(locationOne, locationTwo);
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}
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[Theory]
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[InlineData(1)]
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[InlineData(2)]
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[InlineData(4)]
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[InlineData(8)]
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public void CityDistributionMustBeUniform(int degree)
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{
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var locationGenerator = RandomizerFactory.GetRandomizer(new FieldOptionsCity { ValueAsString = true, UseNullValues = false });
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var concurrentDictionary = new ConcurrentDictionary<string, long>();
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var options = new ParallelOptions { MaxDegreeOfParallelism = degree };
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Parallel.For(0, 1000, options, i =>
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{
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Parallel.For(0, 1000, options, j =>
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{
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var location = locationGenerator.Generate();
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concurrentDictionary.AddOrUpdate(location, _ => 1, (k, v) => v + 1);
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});
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});
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var topCount = concurrentDictionary.OrderByDescending(pair => pair.Value).First();
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var bottomCount = concurrentDictionary.OrderBy(pair => pair.Value).First();
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_output.WriteLine($"{topCount}");
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_output.WriteLine($"{bottomCount}");
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Assert.True(topCount.Value/bottomCount.Value<2);
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Assert.NotEqual(topCount.Key, bottomCount.Key);
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}
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[Fact]
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public void SystemRandomDistributionMustBeUniform()
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{
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var concurrentDictionary = new ConcurrentDictionary<int, long>();
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Parallel.For(0, 1000, i =>
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{
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Parallel.For(0, 1000, j =>
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{
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int index;
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lock (RandLock)
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{
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index = Random.Next(0, 2000);
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}
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46-
[Fact]
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public void TwoRandomCitiesMustNotBeTheSame()
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{
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var locationGenerator = RandomizerFactory.GetRandomizer(new FieldOptionsCity { ValueAsString = true, UseNullValues = false });
50-
var locationOne = locationGenerator.Generate();
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var locationTwo = locationGenerator.Generate();
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Assert.NotEqual(locationOne, locationTwo);
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}
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concurrentDictionary.AddOrUpdate(index, _ => 1, (k, v) => v + 1);
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});
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});
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55-
[Fact]
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public void SystemRandomDistributionMustBeUniform()
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{
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var concurrentDictionary = new ConcurrentDictionary<int, long>();
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Parallel.For(0, 1000, i =>
60-
{
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Parallel.For(0, 1000, j =>
62-
{
63-
int index;
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lock (randLock)
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{
66-
index = random.Next(0, 2000);
67-
}
75+
var topCount = concurrentDictionary.OrderByDescending(pair => pair.Value).First();
76+
var bottomCount = concurrentDictionary.OrderBy(pair => pair.Value).First();
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69-
concurrentDictionary.AddOrUpdate(index, _ => 1, (k, v) => v + 1);
70-
});
71-
});
72-
var topCount = concurrentDictionary.OrderByDescending(pair => pair.Value).First();
73-
var bottomCount = concurrentDictionary.OrderBy(pair => pair.Value).First();
74-
_output.WriteLine($"{topCount}");
75-
_output.WriteLine($"{bottomCount}");
76-
Assert.True(topCount.Value / bottomCount.Value < 2);
77-
Assert.NotEqual(topCount.Key, bottomCount.Key);
78+
_output.WriteLine($"{topCount}");
79+
_output.WriteLine($"{bottomCount}");
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79-
}
80-
}
81+
Assert.True(topCount.Value / bottomCount.Value < 2);
82+
Assert.NotEqual(topCount.Key, bottomCount.Key);
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}
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}

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