feat: Add Aspire AppHost testing.

[newmancodes]

No description provided.

[Copilot]

Pull request overview

Adds initial infrastructure to run Aspire AppHost-related tests and wires them into CI for PR validation.

Changes:

• Adds a new DistHaul.Tests xUnit project configured for Microsoft.Testing.Platform.
• Updates the Aspire AppHost project and Aspire config to align with the new DistHaul.AppHost location/name.
• Extends the GitHub Actions workflow to run .NET restore/build/test as part of the end-to-end job (including on pull requests).

Reviewed changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
global.json	Configures dotnet test runner selection (Microsoft.Testing.Platform).
DistHaul/DistHaul.Tests/xunit.runner.json	Adds xUnit runner schema file for the new test project.
DistHaul/DistHaul.Tests/UnitTest1.cs	Adds a placeholder test class/test.
DistHaul/DistHaul.Tests/DistHaul.Tests.csproj	Introduces a new test project referencing the AppHost and MTP-enabled xUnit packages.
DistHaul/DistHaul.sln	Adds the new test project and renames/relocates the AppHost entry.
DistHaul/DistHaul.AppHost/Properties/launchSettings.json	Adds launch profiles for the AppHost.
DistHaul/DistHaul.AppHost/Program.cs	Introduces the Aspire distributed application composition (Keycloak/Kafka/Redis/Postgres + executables).
DistHaul/DistHaul.AppHost/DistHaul.AppHost.csproj	Enables warnings-as-errors and adds Aspire.Hosting.Testing.
DistHaul/.gitignore	Adds a standard .NET-focused gitignore for the DistHaul/ subtree.
aspire.config.json	Updates the configured AppHost path to DistHaul/DistHaul.AppHost.
.github/workflows/main.yml	Runs the new AppHost restore/build/test steps and triggers on PRs to main.

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[Copilot]

The dotnet build command has a misspelled option (--confiugration), which will cause this step to fail. Use the correct --configuration option name.

Suggested change

	run: dotnet build DistHaul.sln --confiugration Release --no-restore
	run: dotnet build DistHaul.sln --configuration Release --no-restore

[Copilot]

This dotnet build DistHaul.sln step runs from the repo root (no working-directory), but DistHaul.sln appears to live under the DistHaul/ folder (as used in the restore step). Either set working-directory: DistHaul here or update the command to build DistHaul/DistHaul.sln.

Suggested change

	run: dotnet build DistHaul.sln --confiugration Release --no-restore
	run: dotnet build DistHaul.sln --confiugration Release --no-restore
	working-directory: DistHaul

[Copilot]

dotnet test doesn’t support a --solution option; the solution or project should be passed as a positional argument (e.g., dotnet test DistHaul.sln). As written, this will fail argument parsing.

Suggested change

	run: dotnet test --solution .\DistHaul.sln --configuration Release --no-build --verbosity normal --results-directory .\TestResults --coverage --coverage-output-format cobertura
	run: dotnet test DistHaul.sln --configuration Release --no-build --verbosity normal --results-directory ./TestResults --coverage --coverage-output-format cobertura

[Copilot]

This job uses shell: bash but passes Windows-style paths (.\DistHaul.sln, .\TestResults). In bash, backslashes will be treated as escapes and likely resolve to the wrong paths (or not resolve at all). Use ./DistHaul.sln and ./TestResults (or just DistHaul.sln / TestResults) to be portable on ubuntu-latest.

Suggested change

	run: dotnet test --solution .\DistHaul.sln --configuration Release --no-build --verbosity normal --results-directory .\TestResults --coverage --coverage-output-format cobertura
	run: dotnet test --solution ./DistHaul.sln --configuration Release --no-build --verbosity normal --results-directory ./TestResults --coverage --coverage-output-format cobertura

[Copilot]

Assert.True(true) is a no-op test and won’t catch regressions. Replace this with a meaningful test that exercises the Aspire AppHost (e.g., using Aspire.Hosting.Testing to start the distributed app and assert expected resources/endpoints are healthy).

Suggested change

	namespace DistHaul.Tests;
	public class UnitTest1
	{
	[Fact]
	public void Test1()
	{
	Assert.True(true);
	}
	using System.Reflection;
	using Aspire.Hosting.Testing;
	namespace DistHaul.Tests;
	public class UnitTest1
	{
	[Fact]
	public async Task Test1()
	{
	var appHostType = FindAppHostType();
	Assert.NotNull(appHostType);
	var builder = await CreateTestingBuilderAsync(appHostType!);
	Assert.NotNull(builder);
	var buildAsyncMethod = builder.GetType().GetMethod("BuildAsync", Type.EmptyTypes);
	Assert.NotNull(buildAsyncMethod);
	var buildTask = (Task)buildAsyncMethod!.Invoke(builder, null)!;
	await buildTask;
	var app = buildTask.GetType().GetProperty("Result")!.GetValue(buildTask);
	Assert.NotNull(app);
	try
	{
	var startAsyncMethod = app!.GetType().GetMethod("StartAsync", Type.EmptyTypes);
	Assert.NotNull(startAsyncMethod);
	var startTask = (Task)startAsyncMethod!.Invoke(app, null)!;
	await startTask;
	}
	finally
	{
	if (app is IAsyncDisposable asyncDisposable)
	{
	await asyncDisposable.DisposeAsync();
	}
	else if (app is IDisposable disposable)
	{
	disposable.Dispose();
	}
	}
	}
	private static Type? FindAppHostType()
	{
	foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
	{
	Type? appHostType;
	try
	{
	appHostType = assembly
	.GetTypes()
	.FirstOrDefault(t =>
	t is { IsClass: true, IsAbstract: false } &&
	t.Namespace == "Projects" &&
	t.Name.EndsWith("_AppHost", StringComparison.Ordinal));
	}
	catch (ReflectionTypeLoadException ex)
	{
	appHostType = ex.Types.FirstOrDefault(t =>
	t is { IsClass: true, IsAbstract: false } &&
	t.Namespace == "Projects" &&
	t.Name.EndsWith("_AppHost", StringComparison.Ordinal));
	}
	if (appHostType is not null)
	{
	return appHostType;
	}
	}
	return null;
	}
	private static async Task<object> CreateTestingBuilderAsync(Type appHostType)
	{
	var createAsyncMethod = typeof(DistributedApplicationTestingBuilder)
	.GetMethods(BindingFlags.Public | BindingFlags.Static)
	.First(m => m.Name == "CreateAsync" && m.IsGenericMethodDefinition && m.GetParameters().Length == 0)
	.MakeGenericMethod(appHostType);
	var createTask = (Task)createAsyncMethod.Invoke(null, null)!;
	await createTask;
	return createTask.GetType().GetProperty("Result")!.GetValue(createTask)!;
	}