ProducesResponseTypeAttribute(int statusCode) ctor added

Addresses #4863

src/Microsoft.AspNetCore.Mvc.Core/ProducesResponseTypeAttribute.cs

@@ -13,6 +13,15 @@ namespace Microsoft.AspNetCore.Mvc
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
     public class ProducesResponseTypeAttribute : Attribute, IApiResponseMetadataProvider
     {
+        /// <summary>
+        /// Initializes an instance of <see cref="ProducesResponseTypeAttribute"/>.
+        /// </summary>       
+        /// <param name="statusCode">The HTTP response status code.</param>
+        public ProducesResponseTypeAttribute(int statusCode)
+            : this(typeof(void), statusCode)
+        {
+        }
+
         /// <summary>
         /// Initializes an instance of <see cref="ProducesResponseTypeAttribute"/>.
         /// </summary>

test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test/DefaultApiDescriptionProviderTest.cs

@@ -423,12 +423,15 @@ namespace Microsoft.AspNetCore.Mvc.Description
                     new FilterDescriptor(
                         new ProducesAttribute("text/json", "application/json") { Type = typeof(Customer) },
                         FilterScope.Action),
+                    new FilterDescriptor(
+                        new ProducesResponseTypeAttribute(304),
+                        FilterScope.Action),
                     new FilterDescriptor(
                         new ProducesResponseTypeAttribute(typeof(BadData), 400),
                         FilterScope.Action),
                     new FilterDescriptor(
                         new ProducesResponseTypeAttribute(typeof(ErrorDetails), 500),
-                        FilterScope.Action)
+                        FilterScope.Action),
                 };
 
                 return new TheoryData<Type, string, List<FilterDescriptor>>
@@ -443,11 +446,16 @@ namespace Microsoft.AspNetCore.Mvc.Description
                         nameof(DefaultApiDescriptionProviderTest.ReturnsActionResult),
                         filterDescriptors
                     },
+                    {
+                        typeof(DefaultApiDescriptionProviderTest),
+                        nameof(DefaultApiDescriptionProviderTest.ReturnsActionResult),
+                        filterDescriptors
+                    },
                     {
                         typeof(DerivedProducesController),
                         nameof(DerivedProducesController.ReturnsActionResult),
                         filterDescriptors
-                    },
+                    }
                 };
             }
         }
@@ -469,7 +477,7 @@ namespace Microsoft.AspNetCore.Mvc.Description
 
             // Assert
             var description = Assert.Single(descriptions);
-            Assert.Equal(3, description.SupportedResponseTypes.Count);
+            Assert.Equal(4, description.SupportedResponseTypes.Count);
 
             Assert.Collection(
                 description.SupportedResponseTypes.OrderBy(responseType => responseType.StatusCode),
@@ -481,6 +489,13 @@ namespace Microsoft.AspNetCore.Mvc.Description
                     Assert.Equal(expectedMediaTypes, GetSortedMediaTypes(responseType));
                 },
                 responseType =>
+                {
+                    Assert.Equal(304, responseType.StatusCode);
+                    Assert.Equal(typeof(void), responseType.Type);
+                    Assert.Null(responseType.ModelMetadata);
+                    Assert.Empty(responseType.ApiResponseFormats);
+                },
+                responseType =>
                 {
                     Assert.Equal(400, responseType.StatusCode);
                     Assert.Equal(typeof(BadData), responseType.Type);
@@ -509,7 +524,7 @@ namespace Microsoft.AspNetCore.Mvc.Description
                         new ProducesAttribute("text/json", "application/json"),
                         FilterScope.Action),
                     new FilterDescriptor(
-                        new ProducesResponseTypeAttribute(typeof(void), 200),
+                        new ProducesResponseTypeAttribute(200),
                         FilterScope.Action),
                     new FilterDescriptor(
                         new ProducesResponseTypeAttribute(typeof(BadData), 400),

test/Microsoft.AspNetCore.Mvc.Core.Test/ProducesAttributeTests.cs

@@ -126,7 +126,7 @@ namespace Microsoft.AspNetCore.Mvc.Test
                        () => new ProducesAttribute(contentTypes[0], contentTypes.Skip(1).ToArray()));
 
             Assert.Equal(
-                string.Format("The argument '{0}' is invalid. "+
+                string.Format("The argument '{0}' is invalid. " +
                               "Media types which match all types or match all subtypes are not supported.",
                               invalidContentType),
                 ex.Message);