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corstiancorstian
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feat: add a Whaally.Domain.Testing package containing rudimentary test harnesses for testing domain behaviour
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8 files changed

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‎Whaally.Domain.sln‎

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@@ -32,6 +32,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleSample", "samples\Co
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Whaally.Domain.Abstractions", "src\Whaally.Domain.Abstractions\Whaally.Domain.Abstractions.csproj", "{B941C601-66E6-4764-AC79-139A3484FF26}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Whaally.Domain.Testing", "src\Whaally.Domain.Testing\Whaally.Domain.Testing.csproj", "{F31853A3-42FA-4A3E-91F2-091D1CE94E04}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{B941C601-66E6-4764-AC79-139A3484FF26}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{B941C601-66E6-4764-AC79-139A3484FF26}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{B941C601-66E6-4764-AC79-139A3484FF26}.Release|Any CPU.Build.0 = Release|Any CPU
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{F31853A3-42FA-4A3E-91F2-091D1CE94E04}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{F31853A3-42FA-4A3E-91F2-091D1CE94E04}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{F31853A3-42FA-4A3E-91F2-091D1CE94E04}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{F31853A3-42FA-4A3E-91F2-091D1CE94E04}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
@@ -93,6 +99,7 @@ Global
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{9AF0C648-D5E4-4701-AEC4-5AC5B3166B9F} = {F34E58C9-5FE8-4ED5-B88D-02AEE1D30907}
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{BD192AB0-96AB-4483-97EE-8B71737A77F4} = {E88FF4B1-4D2E-415E-92BF-61E3829CDB9B}
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{B941C601-66E6-4764-AC79-139A3484FF26} = {675431A2-F61A-4941-A1A3-2EBFB596E44E}
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{F31853A3-42FA-4A3E-91F2-091D1CE94E04} = {675431A2-F61A-4941-A1A3-2EBFB596E44E}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {68BCF0DD-5501-460A-B702-728C2A93C91C}

‎src/Whaally.Domain.Testing/CommandTest.cs‎

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using FluentResults;
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using Whaally.Domain.Abstractions;
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namespace Whaally.Domain.Testing;
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public abstract class CommandTest<TAggregate, TCommand> : DomainTest
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where TAggregate : class, IAggregate
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where TCommand : class, ICommand
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{
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public ICommandHandler Handler { get; }
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public TAggregate Aggregate { get; }
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public TCommand Command { get; }
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public CommandHandlerContext<TAggregate> Context { get; }
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public Result Result { get; private init; }
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public IEnumerable<IEvent> Events { get; private init; }
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public CommandTest(
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TAggregate aggregate,
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TCommand command)
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{
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Handler = Domain.GetCommandHandler(typeof(TCommand));
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Aggregate = aggregate;
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Command = command;
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var id = Guid.NewGuid();
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// ToDo: Fix this usage
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Context = new CommandHandlerContext<TAggregate>(Services, id.ToString())
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{
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ParentContext = default,
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Aggregate = Aggregate
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};
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var output = Handler.Evaluate(Context, Command);
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if (output.GetType().GenericTypeArguments.Any())
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Result = new Result().WithReasons(output.Reasons);
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else
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Result = (Result)output;
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Events = Context.Events;
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}
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}

‎src/Whaally.Domain.Testing/DomainTest.cs‎

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using Microsoft.Extensions.DependencyInjection;
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using Whaally.Domain.Abstractions;
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namespace Whaally.Domain.Testing;
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public abstract class DomainTest
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{
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public IServiceProvider Services { get; init; }
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= new ServiceCollection()
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.AddDomain()
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.BuildServiceProvider();
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public DomainContext Domain => Services.GetRequiredService<DomainContext>();
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public IAggregateHandlerFactory Factory => Services.GetRequiredService<IAggregateHandlerFactory>();
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}

‎src/Whaally.Domain.Testing/EventTest.cs‎

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using Whaally.Domain.Abstractions;
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namespace Whaally.Domain.Testing;
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public abstract class EventTest<TAggregate, TEvent> : DomainTest
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where TAggregate : class, IAggregate, new()
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where TEvent : class, IEvent
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{
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public IEventHandler<TAggregate, TEvent> Handler { get; }
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public TAggregate Aggregate { get; }
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public TEvent Event { get; }
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public EventHandlerContext<TAggregate> Context { get; }
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public TAggregate UpdatedAggregate { get; }
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public EventTest(
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IEventHandler<TAggregate, TEvent> handler,
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TAggregate aggregate,
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TEvent @event)
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{
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Handler = handler;
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Aggregate = aggregate;
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Event = @event;
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var id = Guid.NewGuid();
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Context = new EventHandlerContext<TAggregate>(id.ToString())
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{
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ParentContext = default,
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Aggregate = Aggregate
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};
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UpdatedAggregate = Handler.Apply(Context, Event);
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}
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}

‎src/Whaally.Domain.Testing/ServiceTest.cs‎

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using FluentResults;
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using Whaally.Domain.Abstractions;
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namespace Whaally.Domain.Testing;
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public abstract class ServiceTest<TService> : DomainTest
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where TService : class, IService
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{
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public IServiceHandler<TService> Handler { get; }
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public TService Service { get; }
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public ServiceHandlerContext Context { get; }
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public Result Result { get; private init; }
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public IEnumerable<ICommand> Commands { get; private init; }
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public ServiceTest(
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IServiceHandler<TService> handler,
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TService service)
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{
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Handler = handler;
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Service = service;
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var id = Guid.NewGuid();
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Context = new ServiceHandlerContext(Services)
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{
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ParentContext = default
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};
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var output = Handler.Handle(Context, Service).Result;
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if (output.GetType().GenericTypeArguments.Any())
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Result = new Result().WithReasons(output.Reasons);
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else
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Result = (Result)output;
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Commands = Context.Commands.SelectMany(q => q.Messages);
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}
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}

‎src/Whaally.Domain.Testing/Whaally.Domain.Testing.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
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</PropertyGroup>
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<ItemGroup>
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<None Include="..\..\assets\whaally-logo.png" Pack="true" PackagePath="\" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\Whaally.Domain\Whaally.Domain.csproj" />
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</ItemGroup>
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<PropertyGroup>
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<PackageId>Whaally.Domain.Testing</PackageId>
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<Description>Test helpers to validate the correct functioning of domain implementations.</Description>
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<PackageProjectUrl>https://github.com/whaally/domain</PackageProjectUrl>
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<RepositoryUrl>https://github.com/whaally/domain</RepositoryUrl>
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<PackageLicenseExpression>MIT</PackageLicenseExpression>
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<Copyright>Copyright (c) Whaally 2025</Copyright>
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<RepositoryType>git</RepositoryType>
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<Authors>Corstian Boerman</Authors>
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<Company>Whaally</Company>
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<PackageTags>ddd domain model abstraction distributed
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actor framework</PackageTags>
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<PackageIcon>whaally-logo.png</PackageIcon>
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<PackageReleaseNotes>$([System.IO.File]::ReadAllText("$(MSBuildProjectDirectory)\..\Whaally.Domain\release-notes.txt"))</PackageReleaseNotes>
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</PropertyGroup>
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</Project>

‎src/Whaally.Domain/Service/ServiceHandlerContext.cs‎

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@@ -43,7 +43,7 @@ public IReadOnlyCollection<ICommandEnvelope> Commands
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public IAggregateHandlerFactory Factory
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=> _services.GetRequiredService<IAggregateHandlerFactory>();
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/// <summary>
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/// Evaluates a service and when successfull, adds the resulting operations to the current commands basket.
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/// </summary>

‎src/Whaally.Domain/Whaally.Domain.csproj‎

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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
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<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
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<PackageReference Include="System.Diagnostics.DiagnosticSource" Version="9.0.0" />
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</ItemGroup>

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