Employed disposed flag in async disposable pattern scope #33

The compile problem in the example project has been addressed in this code commitment too.

Author: Arash-Sabet

examples/Xunit.Microsoft.DependencyInjection.ExampleTests/Fixtures/TestFixture.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using System.Threading.Tasks;
 using Xunit.Microsoft.DependencyInjection.Abstracts;
 using Xunit.Microsoft.DependencyInjection.ExampleTests.Services;
 
@@ -12,6 +13,9 @@ protected override void AddServices(IServiceCollection services, IConfiguration
                 .AddTransient<ICalculator, Calculator>()
                 .Configure<Options>(config => configuration.GetSection("Options").Bind(config));
 
+        protected override ValueTask DisposeAsyncCore()
+            => new ValueTask();
+
         protected override string GetConfigurationFile()
             => "appsettings.json";
     }

examples/Xunit.Microsoft.DependencyInjection.ExampleTests/IntegrationTests.cs

@@ -1,4 +1,5 @@
 using Microsoft.Extensions.Options;
+using System.Threading.Tasks;
 using Xunit.Abstractions;
 using Xunit.Microsoft.DependencyInjection.Abstracts;
 using Xunit.Microsoft.DependencyInjection.ExampleTests.Fixtures;
@@ -40,5 +41,8 @@ public void Test2(int x, int y)
         protected override void Clear()
         {
         }
+
+        protected override ValueTask DisposeAsyncCore()
+            => new ValueTask();
     }
 }

src/Abstracts/TestBed.cs

@@ -10,6 +10,7 @@ public abstract class TestBed<TFixture> : IDisposable, IClassFixture<TFixture>,
 		protected readonly ITestOutputHelper _testOutputHelper;
 		protected readonly TFixture _fixture;
 		private bool _disposedValue;
+		private bool _disposedAsync;
 
 		public TestBed(ITestOutputHelper testOutputHelper, TFixture fixture)
 			=> (_testOutputHelper, _fixture) = (testOutputHelper, fixture);
@@ -48,8 +49,12 @@ public void Dispose()
 
 		public async ValueTask DisposeAsync()
 		{
-			await DisposeAsyncCore();
-			GC.SuppressFinalize(this);
+			if (!_disposedAsync)
+			{
+				await DisposeAsyncCore();
+				GC.SuppressFinalize(this);
+				_disposedAsync = true;
+			}
 		}
 
 		protected abstract ValueTask DisposeAsyncCore();

src/Abstracts/TestBedFixture.cs

@@ -14,6 +14,7 @@ public abstract class TestBedFixture : IDisposable, IAsyncDisposable
 		private readonly IServiceCollection _services;
 		private IServiceProvider _serviceProvider;
 		private bool _disposedValue;
+		private bool _disposedAsync;
 
 		protected TestBedFixture()
 		{
@@ -99,8 +100,12 @@ public void Dispose()
 
         public async ValueTask DisposeAsync()
         {
-			await DisposeAsyncCore();
-			GC.SuppressFinalize(this);
+			if (!_disposedAsync)
+			{
+				await DisposeAsyncCore();
+				GC.SuppressFinalize(this);
+				_disposedAsync = true;
+			}
         }
 
 		protected abstract ValueTask DisposeAsyncCore();