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mwhelanmwhelan
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Added data sources
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Lines changed: 166 additions & 9 deletions

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‎NTestDataBuilder.Tests/DataSources/DataSourceTests.cs‎

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using System;
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using System.Collections.Generic;
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using NTestDataBuilder.DataSources;
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using NTestDataBuilder.DataSources.Generators;
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using Shouldly;
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using Xunit;
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namespace NTestDataBuilder.Tests.DataSources
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{
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public class DataSourceTests
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{
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[Fact]
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public void WhenCreatingADataSource_ThenListShouldContainAllTheValues()
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{
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var sut = new DummyDataSource();
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var result = sut.List;
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result.Count.ShouldBe(3);
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result.ShouldBe(new List<string> { "Value 1", "Value 2", "Value 3" });
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}
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[Fact]
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public void WhenGeneratingValuesFromDefaultDataSource_ThenShouldGenerateItemFromList()
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{
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var sut = new DummyDataSource();
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var result = sut.Next();
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sut.List.ShouldContain(result);
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}
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[Fact]
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public void WhenGeneratingValuesFromDefaultDataSource_ThenShouldGenerateRandomItemsFromList()
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{
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var sut = new DummyDataSource();
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var results = new List<string>();
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for (int i = 0; i < 10; i++)
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{
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results.Add(sut.Next());
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}
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foreach (var item in sut.List)
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{
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results.ShouldContain(item);
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}
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}
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[Fact]
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public void WhenGeneratingValuesFromSequentialDataSource_ThenShouldGenerateSequentialItems()
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{
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var sut = new DummyDataSource(new SequentialGenerator());
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sut.Next().ShouldBe(sut.List[0]);
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sut.Next().ShouldBe(sut.List[1]);
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sut.Next().ShouldBe(sut.List[2]);
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sut.Next().ShouldBe(sut.List[0]);
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}
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[Fact]
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public void WhenGeneratingValuesFromUniqueSequentialDataSource_ThenShouldThrowWhenCollectionExceeded()
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{
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var sut = new DummyDataSource(new SequentialGenerator(0,1,true));
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sut.Next().ShouldBe(sut.List[0]);
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sut.Next().ShouldBe(sut.List[1]);
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sut.Next().ShouldBe(sut.List[2]);
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Should.Throw<InvalidOperationException>(() => sut.Next());
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}
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}
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public class DummyDataSource : DataSource<string>
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{
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public DummyDataSource(IGenerator generator)
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: base(generator) { }
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public DummyDataSource()
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: this(new RandomGenerator()) { }
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protected override IList<string> InitializeList()
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{
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return new List<string>{"Value 1", "Value 2", "Value 3"};
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}
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}
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}

‎NTestDataBuilder.Tests/DataSources/Generators/RandomGeneratorTests.cs‎

Lines changed: 28 additions & 3 deletions
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@@ -1,4 +1,5 @@
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using System;
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using System.Collections.Generic;
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using NTestDataBuilder.DataSources.Generators;
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using Shouldly;
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using Xunit;
@@ -9,9 +10,6 @@ namespace NTestDataBuilder.Tests.DataSources.Generators
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public class RandomGeneratorTests
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{
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[Theory,
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InlineData(0,0),
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InlineData(0,-1),
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InlineData(-1,-2),
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InlineData(5,4),
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InlineData(5,5)]
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public void WhenCreatingRandomGenerator_ThenStartIndexMustBeLessThanListSize(int startIndex, int listSize)
@@ -37,5 +35,32 @@ public void WhenGeneratingRandomIntegers_ThenShouldAlwaysGenerateIntegerBetweenS
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result.ShouldBeLessThanOrEqualTo(maximumValue);
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}
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}
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[Fact]
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public void WhenGeneratingRandomIntegers_ThenShouldBeAbleToGenerateLowerBoundaryValue()
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{
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var results = new List<int>();
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var sut = new RandomGenerator(0, 3);
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for (int i = 0; i < 10; i++)
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{
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results.Add(sut.Generate());
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}
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results.ShouldContain(0);
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}
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[Fact]
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public void WhenGeneratingRandomIntegers_ThenShouldBeAbleToGenerateUpperBoundaryValue()
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{
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var results = new List<int>();
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var sut = new RandomGenerator(0, 3);
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for (int i = 0; i < 10; i++)
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{
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results.Add(sut.Generate());
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}
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results.ShouldContain(2);
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results.ShouldNotContain(3);
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}
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}
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}

‎NTestDataBuilder.Tests/NTestDataBuilder.Tests.csproj‎

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</Reference>
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</ItemGroup>
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<ItemGroup>
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<Compile Include="DataSources\DataSourceTests.cs" />
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<Compile Include="DataSources\Generators\RandomGeneratorTests.cs" />
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<Compile Include="DataSources\Generators\SequentiaGeneratorTests.cs" />
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<Compile Include="EquivalenceClasses\StringEquivalenceClassesTests.cs" />

‎NTestDataBuilder/DataSources/DataSource.cs‎

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using System.Collections.Generic;
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using NTestDataBuilder.DataSources.Generators;
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namespace NTestDataBuilder.DataSources
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{
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//public interface IDataSource<T>
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//{
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// T Next();
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//}
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public abstract class DataSource<T> //: IDataSource<T>
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{
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public IList<T> List { get; private set; }
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public IGenerator Generator { get; private set; }
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public DataSource(IGenerator generator)
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{
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Generator = generator;
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List = InitializeList();
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Generator.ListSize = List.Count;
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}
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public DataSource()
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: this(new RandomGenerator()) { }
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protected abstract IList<T> InitializeList();
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public virtual T Next()
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{
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return List[Generator.Generate()];
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}
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}
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}

‎NTestDataBuilder/DataSources/Generators/IGenerator.cs‎

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@@ -3,5 +3,7 @@ namespace NTestDataBuilder.DataSources.Generators
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public interface IGenerator
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{
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int Generate();
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int StartIndex { get; set; }
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int ListSize { get; set; }
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}
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}

‎NTestDataBuilder/DataSources/Generators/RandomGenerator.cs‎

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@@ -5,11 +5,17 @@ namespace NTestDataBuilder.DataSources.Generators
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public class RandomGenerator : IGenerator
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{
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private readonly Random _random;
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public int StartIndex { get; private set; }
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public int ListSize { get; private set; }
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public int StartIndex { get; set; }
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public int ListSize { get; set; }
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public RandomGenerator() : this(0,1)
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{
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}
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public RandomGenerator(int startIndex, int listSize)
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{
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Guard.Against(startIndex < 0, "startIndex must be zero or more");
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Guard.Against(listSize < 1, "listSize must be greater than zero");
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Guard.Against(startIndex >= listSize, "startIndex must be less than listSize");
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StartIndex = startIndex;
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public int Generate()
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{
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return _random.Next(StartIndex, ListSize-1);
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return _random.Next(StartIndex, ListSize);
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}
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}
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}

‎NTestDataBuilder/DataSources/Generators/SequentialGenerator.cs‎

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@@ -5,10 +5,14 @@ namespace NTestDataBuilder.DataSources.Generators
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public class SequentialGenerator : IGenerator
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{
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private int _currentListIndex;
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public int StartIndex { get; private set; }
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public int ListSize { get; private set; }
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public int StartIndex { get; set; }
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public int ListSize { get; set; }
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public bool ListShouldBeUnique { get; private set; }
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public SequentialGenerator() : this(0,1)
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{
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}
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public SequentialGenerator(int startIndex, int listSize, bool listShouldBeUnique = false)
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{
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Guard.Against(startIndex < 0, "startIndex must be zero or more");
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{
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_currentListIndex = StartIndex;
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}
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}
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}
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}

‎NTestDataBuilder/NTestDataBuilder.csproj‎

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</ItemGroup>
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<ItemGroup>
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<Compile Include="AnonymousValueFixture.cs" />
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<Compile Include="DataSources\CalendarDaySource.cs" />
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<Compile Include="DataSources\CalendarUkSeasonSource.cs" />
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<Compile Include="DataSources\DataSource.cs" />
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<Compile Include="Guard.cs" />
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<Compile Include="DataSources\Generators\IGenerator.cs" />
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<Compile Include="DataSources\Generators\RandomGenerator.cs" />

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