Small changes

Tests/Musify.WebApi.Tests/Integration/ApiIntegrationTests.cs

@@ -38,8 +38,9 @@ public sealed class ApiIntegrationTests(MusifyApiFactory factory)
 
         var get = await _client.GetAsync($"/users/{id}");
         get.StatusCode.Should().Be(HttpStatusCode.OK);
-        var user = await get.Content.ReadFromJsonAsync<UserApplicationResponse>();
+        UserApplicationResponse user = await get.Content.ReadFromJsonAsync<UserApplicationResponse>()
-        user!.Id.Should().Be(id);
+            ?? throw new InvalidOperationException("The response body was null.");
+        user.Id.Should().Be(id);
         user.Name.Should().Be("Alice");
     }
 
@@ -49,8 +50,9 @@ public sealed class ApiIntegrationTests(MusifyApiFactory factory)
         var response = await _client.PostAsJsonAsync("/users/", new CreateUserRequest(Guid.Empty, "", null, null));
 
         response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
-        var problem = await response.Content.ReadFromJsonAsync<ValidationProblemResponse>();
+        ValidationProblemResponse problem = await response.Content.ReadFromJsonAsync<ValidationProblemResponse>()
-        problem!.Errors.Should().ContainKey(nameof(CreateUserRequest.Name));
+            ?? throw new InvalidOperationException("The response body was null.");
+        problem.Errors.Should().ContainKey(nameof(CreateUserRequest.Name));
     }
 
     [Fact]
@@ -80,8 +82,9 @@ public sealed class ApiIntegrationTests(MusifyApiFactory factory)
             new CreatePlayListRequest("My Mix", "A description", null));
 
         response.StatusCode.Should().Be(HttpStatusCode.Created);
-        var playList = await response.Content.ReadFromJsonAsync<PlayListApplicationResponse>();
+        PlayListApplicationResponse playList = await response.Content.ReadFromJsonAsync<PlayListApplicationResponse>()
-        playList!.Name.Should().Be("My Mix");
+            ?? throw new InvalidOperationException("The response body was null.");
+        playList.Name.Should().Be("My Mix");
 
         var get = await _client.GetAsync($"/playLists/{playList.Id}");
         get.StatusCode.Should().Be(HttpStatusCode.OK);
@@ -129,8 +132,9 @@ public sealed class ApiIntegrationTests(MusifyApiFactory factory)
             new RequestTrackUploadUrlsRequest("png", "image/png", "mp3", "audio/mpeg"));
 
         response.StatusCode.Should().Be(HttpStatusCode.OK);
-        var body = await response.Content.ReadFromJsonAsync<TrackUploadUrlsLikeResponse>();
+        TrackUploadUrlsLikeResponse body = await response.Content.ReadFromJsonAsync<TrackUploadUrlsLikeResponse>()
-        body!.PictureUploadUrl.Should().Be("https://signed.example/put");
+            ?? throw new InvalidOperationException("The response body was null.");
+        body.PictureUploadUrl.Should().Be("https://signed.example/put");
         body.AudioUploadUrl.Should().Be("https://signed.example/put");
     }
 }

Tests/Musify.WebApi.Tests/Integration/MusifyApiFactory.cs

@@ -47,12 +47,10 @@ public sealed class MusifyApiFactory : WebApplicationFactory<Program>
 
         builder.ConfigureTestServices(services =>
         {
-            // Never start the RabbitMQ bus, EF outbox delivery or OTLP exporter in tests.
             services.RemoveAll<IHostedService>();
 
             _connection.Open();
 
-            // Replace the Npgsql-backed IDatabase with a shared SQLite TestDatabase.
             services.RemoveAll<IDatabase>();
             services.AddScoped<IDatabase>(_ =>
             {
@@ -64,7 +62,6 @@ public sealed class MusifyApiFactory : WebApplicationFactory<Program>
                 return db;
             });
 
-            // Replace S3 and MassTransit with controllable test doubles.
             services.RemoveAll<IStorageService>();
             services.AddScoped(_ => Storage);
 

Tests/Musify.WebApi.Tests/Musify.WebApi.Tests.csproj

@@ -8,8 +8,6 @@
     <RootNamespace>Musify.WebApi.Tests</RootNamespace>
   </PropertyGroup>
 
-  <!-- ResultHttpExtensions returns Microsoft.AspNetCore.Http.IResult, so the test project
-       needs the ASP.NET Core shared framework to inspect the produced result types. -->
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
@@ -30,7 +28,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\WebApi\WebApi.csproj" />
-    <!-- Reuse TestDatabase / TestData helpers from the Application test project. -->
     <ProjectReference Include="..\..\..\MusifyBackend\Tests\Musify.Application.Tests\Musify.Application.Tests.csproj" />
   </ItemGroup>
 

Tests/Musify.WebApi.Tests/Validators/ValidatorTests.cs

@@ -142,7 +142,6 @@ public sealed class UpdatePlayListRequestValidatorTests
     [Fact]
     public void Empty_string_name_is_allowed_by_length_rule()
     {
-        // Only a MaximumLength rule applies, so an empty (non-null) string passes.
         var model = new UpdatePlayListRequest("", null, null);
         _validator.TestValidate(model).ShouldNotHaveValidationErrorFor(x => x.NewName);
     }

WebApi/Program.cs

@@ -24,5 +24,4 @@ app
 
 app.Run();
 
-// Exposed so WebApplicationFactory<Program> can bootstrap the app in integration tests.
 public partial class Program { }