Fix Mailpit health check status (#512)

* - FAIL: MailPit `ResourceStartsHealthyUsingCustomHttpPort`

* - PASS: MailPit `ResourceStartsHealthyUsingCustomHttpPort`

Author: Catalin-Andronie

examples/mailpit/CommunityToolkit.Aspire.Hosting.MailPit.AppHost/Program.cs

@@ -1,8 +1,10 @@
+using Microsoft.Extensions.Configuration;
 using Projects;
 
 var builder = DistributedApplication.CreateBuilder(args);
 
-var mailPit = builder.AddMailPit("mailpit");
+var httpPort = builder.Configuration.GetValue<int?>("MailPit:HttpPort");
+var mailPit = builder.AddMailPit("mailpit", httpPort: httpPort);
 
 var sendmail = builder.AddProject<CommunityToolkit_Aspire_Hosting_MailPit_SendMailApi>("sendmail")
     .WithReference(mailPit)

src/CommunityToolkit.Aspire.Hosting.MailPit/MailPitHostingExtension.cs

@@ -37,7 +37,14 @@ public static IResourceBuilder<MailPitContainerResource> AddMailPit(this IDistri
                 targetPort: MailPitContainerResource.HttpEndpointPort,
                 port: httpPort,
                 name: MailPitContainerResource.HttpEndpointName)
-            .WithHttpHealthCheck("/", httpPort, MailPitContainerResource.HttpEndpointName);
+            .WithHttpHealthCheck(
+                path: "/livez",
+                statusCode: 200,
+                endpointName: MailPitContainerResource.HttpEndpointName)
+            .WithHttpHealthCheck(
+                path: "/readyz",
+                statusCode: 200,
+                endpointName: MailPitContainerResource.HttpEndpointName);
 
         return rb;
     }

tests/CommunityToolkit.Aspire.Hosting.MailPit.Tests/AppHostHealthChecksTests.cs

@@ -0,0 +1,40 @@
+using Aspire.Components.Common.Tests;
+using Aspire.Hosting;
+using CommunityToolkit.Aspire.Testing;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using System.Security.Cryptography;
+
+namespace CommunityToolkit.Aspire.Hosting.MailPit.Tests;
+
+[RequiresDocker]
+public sealed class AppHostHealthChecksTests(AppHostHealthChecksTests.MailPitAspireIntegrationTestFixture<Projects.CommunityToolkit_Aspire_Hosting_MailPit_AppHost> fixture)
+    : IClassFixture<AppHostHealthChecksTests.MailPitAspireIntegrationTestFixture<Projects.CommunityToolkit_Aspire_Hosting_MailPit_AppHost>>
+{
+    private const string ResourceName = "mailpit";
+
+    [Fact]
+    public async Task ResourceStartsHealthyUsingCustomHttpPort()
+    {
+        await fixture.ResourceNotificationService
+            .WaitForResourceHealthyAsync(ResourceName)
+            .WaitAsync(TimeSpan.FromMinutes(1));
+    }
+
+    public sealed class MailPitAspireIntegrationTestFixture<TEntryPoint>()
+        : AspireIntegrationTestFixture<TEntryPoint> where TEntryPoint : class
+    {
+        protected override void OnBuilderCreated(DistributedApplicationBuilder applicationBuilder)
+        {
+            base.OnBuilderCreated(applicationBuilder);
+            applicationBuilder.Configuration.AddInMemoryCollection([
+                new KeyValuePair<string, string?>("MailPit:HttpPort", $"{GetRandomPort()}"),
+            ]);
+        }
+
+        private static int GetRandomPort()
+        {
+            return RandomNumberGenerator.GetInt32(1024, 65535);
+        }
+    }
+}