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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| namespace Objectivity.AutoFixture.XUnit2.Core.Tests.Attributes | ||
| { | ||
| using FluentAssertions; | ||
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| using global::AutoFixture.Xunit2; | ||
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| using Objectivity.AutoFixture.XUnit2.Core.Attributes; | ||
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| using Xunit; | ||
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| [Collection("FromValuesAttribute")] | ||
| [Trait("Category", "Attributes")] | ||
| public class FromValuesAttributeTests | ||
| { | ||
| public enum Test | ||
| { | ||
| None = 0, | ||
| One = 1, | ||
| Two = 2, | ||
| Three = 3, | ||
| Four = 4, | ||
| Five = 5, | ||
| } | ||
|
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| [AutoData] | ||
| [Theory(DisplayName = "GIVEN values specified WHEN unsigned short populated THEN the value from set is generated")] | ||
| public void GivenValuesSpecified_WhenUShortPopulated_ThenTheValueFromSetIsGenerated( | ||
| [FromValues(1, 5, 4)] ushort targetValue) | ||
| { | ||
| targetValue.Should().BeOneOf(1, 5, 4); | ||
| } | ||
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| [AutoData] | ||
| [Theory(DisplayName = "GIVEN values specified WHEN unsigned short populated THEN the value from set is generated")] | ||
| public void GivenValuesSpecified_WhenEnumPopulated_ThenTheValueFromSetIsGenerated( | ||
| [FromValues(Test.One, Test.Five, 100)] Test targetValue) | ||
| { | ||
| targetValue.Should().BeOneOf(Test.One, Test.Five); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| namespace Objectivity.AutoFixture.XUnit2.Core.Attributes | ||
| { | ||
| using System; | ||
| using System.Reflection; | ||
|
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| using global::AutoFixture; | ||
| using global::AutoFixture.Xunit2; | ||
| using Objectivity.AutoFixture.XUnit2.Core.CustomisationFactories; | ||
| using Objectivity.AutoFixture.XUnit2.Core.SpecimenBuilders; | ||
|
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| [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = true)] | ||
| public sealed class FromValuesAttribute : CustomizeAttribute | ||
| { | ||
| private readonly ICustomisationFactoryProvider factoryProvider = new CustomisationFactoryProvider(); | ||
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| public FromValuesAttribute(params object[] args) | ||
| { | ||
| this.Args = args ?? Array.Empty<object>(); | ||
| } | ||
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| public object[] Args { get; } | ||
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| public override ICustomization GetCustomization(ParameterInfo parameter) | ||
| { | ||
| var type = typeof(RandomValuesParameterBuilder); | ||
| var factory = this.factoryProvider.GetFactory(type); | ||
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| return factory.Create(parameter, false, type, this.Args); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| namespace Objectivity.AutoFixture.XUnit2.Core.SpecimenBuilders | ||
| { | ||
| using System; | ||
| using System.Collections; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics.CodeAnalysis; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
|
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| using global::AutoFixture; | ||
| using global::AutoFixture.Kernel; | ||
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| using Objectivity.AutoFixture.XUnit2.Core.Common; | ||
|
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| internal class RandomValuesParameterBuilder : ISpecimenBuilder | ||
| { | ||
| private readonly Dictionary<Type, IEnumerator> enumerators = new(); | ||
| private readonly object syncRoot = new(); | ||
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| public RandomValuesParameterBuilder(params object[] args) | ||
| { | ||
| this.Args = args.NotNull(nameof(args)); | ||
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| if (this.Args.Length == 0) | ||
| { | ||
| throw new ArgumentException("At least one argument is expected to be specified.", nameof(args)); | ||
|
Check warning on line 26 in src/Objectivity.AutoFixture.XUnit2.Core/SpecimenBuilders/RandomValuesParameterBuilder.cs
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| } | ||
| } | ||
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| public object[] Args { get; } | ||
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| public object Create(object request, ISpecimenContext context) | ||
| { | ||
| if (request is ParameterInfo pi) //// is a parameter | ||
| { | ||
| lock (this.syncRoot) | ||
| { | ||
| return this.CreateValue(pi.ParameterType); | ||
| } | ||
| } | ||
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| return new NoSpecimen(); | ||
|
Check warning on line 42 in src/Objectivity.AutoFixture.XUnit2.Core/SpecimenBuilders/RandomValuesParameterBuilder.cs
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| } | ||
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| private object CreateValue(Type t) | ||
| { | ||
| var generator = this.EnsureGenerator(t); | ||
| generator.MoveNext(); | ||
| return generator.Current; | ||
| } | ||
|
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| private IEnumerator EnsureGenerator(Type t) | ||
| { | ||
| if (!this.enumerators.TryGetValue(t, out var enumerator)) | ||
| { | ||
| enumerator = new RoundRobinCollection(t, this.Args).GetEnumerator(); | ||
| this.enumerators.Add(t, enumerator); | ||
| } | ||
|
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| return enumerator; | ||
| } | ||
|
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| private sealed class RoundRobinCollection : IEnumerable<object> | ||
| { | ||
| private readonly IEnumerable<object> values; | ||
|
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| [SuppressMessage("Security", "CA5394:Do not use insecure randomness", Justification = "It is good enought for collection randomisation.")] | ||
| internal RoundRobinCollection(Type targetType, object[] args) | ||
| { | ||
| var type = targetType.NotNull(nameof(targetType)); | ||
| var random = new Random(); | ||
|
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| if (type.IsEnum) | ||
| { | ||
| // TODO: Should we | ||
| // 1. Allow values outside enum? | ||
| // 2. Filter out values outside enum? | ||
| // 3. Throw exception when values outside enum? | ||
| var enumValues = Enum.GetValues(type).Cast<object>().ToList(); | ||
| this.values = args.Where(enumValues.Contains) | ||
| .OrderBy((_) => random.Next()); | ||
| } | ||
| else | ||
| { | ||
| // TODO: Check nullable | ||
| // TODO: Check reference types | ||
| // TODO: Check min/max of numeric types | ||
| this.values = args.OrderBy((_) => random.Next()); | ||
| } | ||
|
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| if (!this.values.Any()) | ||
| { | ||
| var message = $"AutoFixture was unable to create a value for {targetType.FullName} since it is an enum containing no values. Please add at least one value to the enum."; | ||
| throw new ObjectCreationException(message); | ||
|
Check warning on line 94 in src/Objectivity.AutoFixture.XUnit2.Core/SpecimenBuilders/RandomValuesParameterBuilder.cs
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| } | ||
| } | ||
|
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| [SuppressMessage("Blocker Bug", "S2190:Loops and recursions should not be infinite", Justification = "This is a round robin implementation.")] | ||
| public IEnumerator<object> GetEnumerator() | ||
| { | ||
| while (true) | ||
|
Check warning on line 101 in src/Objectivity.AutoFixture.XUnit2.Core/SpecimenBuilders/RandomValuesParameterBuilder.cs
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| { | ||
| foreach (var obj in this.values) | ||
| { | ||
| yield return obj; | ||
| } | ||
| } | ||
| } | ||
|
|
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| IEnumerator IEnumerable.GetEnumerator() | ||
| { | ||
| return this.GetEnumerator(); | ||
|
Check warning on line 112 in src/Objectivity.AutoFixture.XUnit2.Core/SpecimenBuilders/RandomValuesParameterBuilder.cs
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| } | ||
| } | ||
| } | ||
| } | ||
