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return value for single HttpContext parameter #40235

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Mar 3, 2022
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,11 @@ public static IEndpointConventionBuilder MapGet(
string pattern,
RequestDelegate requestDelegate)
{
var returnType = requestDelegate.Method.ReturnType;
if (returnType is { IsGenericType: true } && returnType.GetGenericTypeDefinition() == typeof(Task<>))
{
return MapMethods(endpoints, pattern, GetVerb, requestDelegate as Delegate);
}
return MapMethods(endpoints, pattern, GetVerb, requestDelegate);
}

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Original file line number Diff line number Diff line change
@@ -1,10 +1,15 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.IO.Pipelines;
using System.Linq.Expressions;
using System.Text;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Routing.Patterns;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Moq;

namespace Microsoft.AspNetCore.Builder;
Expand Down Expand Up @@ -69,6 +74,30 @@ public void MapEndpoint_StringPattern_BuildsEndpoint()
Assert.Equal("/", endpointBuilder1.RoutePattern.RawText);
}

[Fact]
public async Task MapEndpoint_ReturnGenericTypeTask_GeneratedDelegate()
{
var httpContext = new DefaultHttpContext();
var responseBodyStream = new MemoryStream();
httpContext.Response.Body = responseBodyStream;

// Arrange
var builder = new DefaultEndpointRouteBuilder(Mock.Of<IApplicationBuilder>());
static async Task<string> GenericTypeTaskDelegate(HttpContext context) => await Task.FromResult("String Test");

// Act
var endpointBuilder = builder.MapGet("/", GenericTypeTaskDelegate);

// Assert
var endpointBuilder1 = GetRouteEndpointBuilder(builder);
var requestDelegate = endpointBuilder1.RequestDelegate;
await requestDelegate(httpContext);

var responseBody = Encoding.UTF8.GetString(responseBodyStream.ToArray());

Assert.Equal("String Test", responseBody);
}

[Fact]
public void MapEndpoint_TypedPattern_BuildsEndpoint()
{
Expand Down