private static IList <DeclaredApiResponseMetadata> GetResponseMetadataFromConventions(
ApiControllerSymbolCache symbolCache,
IMethodSymbol method,
IReadOnlyList <AttributeData> attributes)
{
foreach (var attribute in attributes)
{
if (attribute.ConstructorArguments.Length != 1 ||
attribute.ConstructorArguments[0].Kind != TypedConstantKind.Type ||
!(attribute.ConstructorArguments[0].Value is ITypeSymbol conventionType))
{
continue;
}
foreach (var conventionMethod in conventionType.GetMembers().OfType <IMethodSymbol>())
{
if (!conventionMethod.IsStatic || conventionMethod.DeclaredAccessibility != Accessibility.Public)
{
continue;
}
if (!SymbolApiConventionMatcher.IsMatch(symbolCache, method, conventionMethod))
{
continue;
}
return(GetResponseMetadataFromMethodAttributes(symbolCache, conventionMethod));
}
}
return(Array.Empty <DeclaredApiResponseMetadata>());
}
private static IMethodSymbol GetMethodFromConventionMethodAttribute(ApiControllerSymbolCache symbolCache, IMethodSymbol method)
{
var attribute = method.GetAttributes(symbolCache.ApiConventionMethodAttribute, inherit: true)
.FirstOrDefault();
if (attribute == null)
{
return(null);
}
if (attribute.ConstructorArguments.Length != 2)
{
return(null);
}
if (attribute.ConstructorArguments[0].Kind != TypedConstantKind.Type ||
!(attribute.ConstructorArguments[0].Value is ITypeSymbol conventionType))
{
return(null);
}
if (attribute.ConstructorArguments[1].Kind != TypedConstantKind.Primitive ||
!(attribute.ConstructorArguments[1].Value is string conventionMethodName))
{
return(null);
}
var conventionMethod = conventionType.GetMembers(conventionMethodName)
.FirstOrDefault(m => m.Kind == SymbolKind.Method && m.IsStatic && m.DeclaredAccessibility == Accessibility.Public);
return((IMethodSymbol)conventionMethod);
}
public async Task GetResponseMetadata_ReturnsValuesFromApiConventionMethodAttribute()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.GetResponseMetadata_ReturnsValuesFromApiConventionMethodAttribute)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Collection(
result,
metadata =>
{
Assert.Equal(200, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
},
metadata =>
{
Assert.Equal(404, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
});
}
public async Task ShouldEvaluateMethod_ReturnsFalse_IfMethodReturnTypeIsInvalid()
{
// Arrange
var source = @"
using Microsoft.AspNetCore.Mvc;
namespace TestNamespace
{
[ApiController]
public class TestController : ControllerBase
{
public DoesNotExist Get(int id)
{
if (id == 0)
{
return NotFound();
}
return new DoesNotExist(id);
}
}
}";
var project = DiagnosticProject.Create(GetType().Assembly, new[] { source });
var compilation = await project.GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var method = (IMethodSymbol)compilation.GetTypeByMetadataName("TestNamespace.TestController").GetMembers("Get").First();
// Act
var result = ApiConventionAnalyzer.ShouldEvaluateMethod(symbolCache, method);
// Assert
Assert.False(result);
}
internal static bool ShouldEvaluateMethod(ApiControllerSymbolCache symbolCache, IMethodSymbol method)
{
if (method == null)
{
return(false);
}
if (method.ReturnsVoid || method.ReturnType.TypeKind == TypeKind.Error)
{
return(false);
}
if (!MvcFacts.IsController(method.ContainingType, symbolCache.ControllerAttribute, symbolCache.NonControllerAttribute))
{
return(false);
}
if (!method.ContainingType.HasAttribute(symbolCache.IApiBehaviorMetadata, inherit: true))
{
return(false);
}
if (!MvcFacts.IsControllerAction(method, symbolCache.NonActionAttribute, symbolCache.IDisposableDispose))
{
return(false);
}
return(true);
}
internal IReadOnlyList <AttributeData> GetConventionTypeAttributes(ApiControllerSymbolCache symbolCache, IMethodSymbol method)
{
var attributes = method.ContainingType.GetAttributes(symbolCache.ApiConventionTypeAttribute).ToArray();
if (attributes.Length == 0)
{
attributes = method.ContainingAssembly.GetAttributes(symbolCache.ApiConventionTypeAttribute).ToArray();
}
return(attributes);
}
internal static bool IsMatch(ApiControllerSymbolCache symbolCache, IMethodSymbol method, IMethodSymbol conventionMethod)
{
return(MethodMatches() && ParametersMatch());
bool MethodMatches()
{
var methodNameMatchBehavior = GetNameMatchBehavior(symbolCache, conventionMethod);
if (!IsNameMatch(method.Name, conventionMethod.Name, methodNameMatchBehavior))
{
return(false);
}
return(true);
}
bool ParametersMatch()
{
var methodParameters = method.Parameters;
var conventionMethodParameters = conventionMethod.Parameters;
for (var i = 0; i < conventionMethodParameters.Length; i++)
{
var conventionParameter = conventionMethodParameters[i];
if (conventionParameter.IsParams)
{
return(true);
}
if (methodParameters.Length <= i)
{
return(false);
}
var nameMatchBehavior = GetNameMatchBehavior(symbolCache, conventionParameter);
var typeMatchBehavior = GetTypeMatchBehavior(symbolCache, conventionParameter);
if (!IsTypeMatch(methodParameters[i].Type, conventionParameter.Type, typeMatchBehavior) ||
!IsNameMatch(methodParameters[i].Name, conventionParameter.Name, nameMatchBehavior))
{
return(false);
}
}
// Ensure convention has at least as many parameters as the method. params convention argument are handled
// inside the for loop.
return(methodParameters.Length == conventionMethodParameters.Length);
}
}
internal static SymbolApiConventionTypeMatchBehavior GetTypeMatchBehavior(ApiControllerSymbolCache symbolCache, ISymbol symbol)
{
var attribute = symbol.GetAttributes(symbolCache.ApiConventionTypeMatchAttribute).FirstOrDefault();
if (attribute == null ||
attribute.ConstructorArguments.Length != 1 ||
attribute.ConstructorArguments[0].Kind != TypedConstantKind.Enum)
{
return(SymbolApiConventionTypeMatchBehavior.AssignableFrom);
}
var intValue = (int)attribute.ConstructorArguments[0].Value;
return((SymbolApiConventionTypeMatchBehavior)intValue);
}
public async Task GetResponseMetadata_ReturnsEmptySequence_IfNoAttributesArePresent_ForPostAction()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerWithoutConvention)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerWithoutConvention.PostPerson)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Empty(result);
}
public async Task IsApiControllerAction_ReturnsFalse_IfContainingTypeIsNotController()
{
// Arrange
var compilation = await GetCompilation();
var symbolCache = new ApiControllerSymbolCache(compilation);
var type = compilation.GetTypeByMetadataName(typeof(ApiConventionAnalyzerTest_IndexModel).FullName);
var method = (IMethodSymbol)type.GetMembers(nameof(ApiConventionAnalyzerTest_IndexModel.OnGet)).First();
// Act
var result = ApiControllerFacts.IsApiControllerAction(symbolCache, method);
// Assert
Assert.False(result);
}
public async Task IsApiControllerAction_ReturnsTrue_ForValidActionMethods()
{
// Arrange
var compilation = await GetCompilation();
var symbolCache = new ApiControllerSymbolCache(compilation);
var type = compilation.GetTypeByMetadataName(typeof(ApiConventionAnalyzerTest_Valid).FullName);
var method = (IMethodSymbol)type.GetMembers(nameof(ApiConventionAnalyzerTest_Valid.Index)).First();
// Act
var result = ApiControllerFacts.IsApiControllerAction(symbolCache, method);
// Assert
Assert.True(result);
}
public async Task GetResponseMetadata_IgnoresProducesAttribute()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.ActionWithProducesAttribute)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Empty(result);
}
public async Task ShouldEvaluateMethod_ReturnsFalse_IfContainingTypeIsNotAction()
{
// Arrange
var compilation = await GetCompilation();
var symbolCache = new ApiControllerSymbolCache(compilation);
var type = compilation.GetTypeByMetadataName(typeof(ApiConventionAnalyzerTest_NotAction).FullName);
var method = (IMethodSymbol)type.GetMembers(nameof(ApiConventionAnalyzerTest_NotAction.Index)).First();
// Act
var result = ApiConventionAnalyzer.ShouldEvaluateMethod(symbolCache, method);
// Assert
Assert.False(result);
}
internal static IList <DeclaredApiResponseMetadata> GetDeclaredResponseMetadata(
ApiControllerSymbolCache symbolCache,
IMethodSymbol method,
IReadOnlyList <AttributeData> conventionTypeAttributes)
{
var metadataItems = GetResponseMetadataFromMethodAttributes(symbolCache, method);
if (metadataItems.Count != 0)
{
return(metadataItems);
}
metadataItems = GetResponseMetadataFromConventions(symbolCache, method, conventionTypeAttributes);
return(metadataItems);
}
public override void Initialize(AnalysisContext context)
{
context.EnableConcurrentExecution();
context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None);
context.RegisterCompilationStartAction(compilationStartAnalysisContext =>
{
var symbolCache = new ApiControllerSymbolCache(compilationStartAnalysisContext.Compilation);
if (symbolCache.ApiConventionTypeAttribute == null || symbolCache.ApiConventionTypeAttribute.TypeKind == TypeKind.Error)
{
// No-op if we can't find types we care about.
return;
}
InitializeWorker(compilationStartAnalysisContext, symbolCache);
});
}
private async Task RunMatchTest(string methodName, string conventionMethodName, bool expected)
{
var compilation = await GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var testController = compilation.GetTypeByMetadataName(TestControllerName);
var testConvention = compilation.GetTypeByMetadataName(TestConventionName);
var method = (IMethodSymbol)testController.GetMembers(methodName).First();
var conventionMethod = (IMethodSymbol)testConvention.GetMembers(conventionMethodName).First();
// Act
var result = IsMatch(symbolCache, method, conventionMethod);
// Assert
Assert.Equal(expected, result);
}
public async Task GetNameMatchBehavior_ReturnsExact_WhenNoNameMatchBehaviorAttributeIsSpecified()
{
// Arrange
var expected = SymbolApiConventionNameMatchBehavior.Exact;
var compilation = await GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var testConvention = compilation.GetTypeByMetadataName(TestConventionName);
var method = testConvention.GetMembers(nameof(TestConvention.MethodWithRandomAttributes)).First();
// Act
var result = GetNameMatchBehavior(symbolCache, method);
// Assert
Assert.Equal(expected, result);
}
public async Task GetNameMatchBehavior_ReturnsValueFromAttributes()
{
// Arrange
var expected = SymbolApiConventionNameMatchBehavior.Prefix;
var compilation = await GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var testConvention = compilation.GetTypeByMetadataName(TestConventionName);
var method = testConvention.GetMembers(nameof(TestConvention.Get)).First();
// Act
var result = GetNameMatchBehavior(symbolCache, method);
// Assert
Assert.Equal(expected, result);
}
public async Task GetTypeMatchBehavior_ReturnsValueFromAttributes()
{
// Arrange
var expected = SymbolApiConventionTypeMatchBehavior.Any;
var compilation = await GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var testConvention = compilation.GetTypeByMetadataName(TestConventionName);
var method = (IMethodSymbol)testConvention.GetMembers(nameof(TestConvention.MethodWithAnyTypeMatchBehaviorParameter)).First();
var parameter = method.Parameters[0];
// Act
var result = GetTypeMatchBehavior(symbolCache, parameter);
// Assert
Assert.Equal(expected, result);
}
private static IList <DeclaredApiResponseMetadata> GetResponseMetadataFromConventions(
ApiControllerSymbolCache symbolCache,
IMethodSymbol method,
IReadOnlyList <AttributeData> attributes)
{
var conventionMethod = GetMethodFromConventionMethodAttribute(symbolCache, method);
if (conventionMethod == null)
{
conventionMethod = MatchConventionMethod(symbolCache, method, attributes);
}
if (conventionMethod != null)
{
return(GetResponseMetadataFromMethodAttributes(symbolCache, conventionMethod));
}
return(Array.Empty <DeclaredApiResponseMetadata>());
}
private async Task <ActualApiResponseMetadata?> RunInspectReturnStatementSyntax(string source, string test)
{
var project = DiagnosticProject.Create(GetType().Assembly, new[] { source });
var compilation = await project.GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var returnType = compilation.GetTypeByMetadataName($"{Namespace}.{test}");
var syntaxTree = returnType.DeclaringSyntaxReferences[0].SyntaxTree;
var method = (IMethodSymbol)returnType.GetMembers().First();
var methodSyntax = syntaxTree.GetRoot().FindNode(method.Locations[0].SourceSpan);
var returnStatement = methodSyntax.DescendantNodes().OfType <ReturnStatementSyntax>().First();
return(SymbolApiResponseMetadataProvider.InspectReturnStatementSyntax(
symbolCache,
compilation.GetSemanticModel(syntaxTree),
returnStatement,
CancellationToken.None));
}
public async Task GetResponseMetadata_ReturnsValueFromProducesResponseType_WhenStatusCodeIsSpecifiedInConstructorWithResponseType()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.ActionWithProducesResponseType_StatusCodeAndTypeInConstructor)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Collection(
result,
metadata =>
{
Assert.Equal(202, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
Assert.Null(metadata.Convention);
});
}
private async Task GetResponseMetadata_IgnoresInvalidOrUnsupportedAttribues(string typeName, string methodName)
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{typeName}");
var method = (IMethodSymbol)controller.GetMembers(methodName).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Collection(
result,
metadata =>
{
Assert.Equal(200, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
Assert.Null(metadata.Convention);
});
}
private static ApiConventionContext GetContext(Compilation compilation, int[] expectedStatusCodes)
{
var symbolCache = new ApiControllerSymbolCache(compilation);
var context = new ApiConventionContext(
symbolCache,
private void InitializeWorker(CompilationStartAnalysisContext compilationStartAnalysisContext, ApiControllerSymbolCache symbolCache)
{
compilationStartAnalysisContext.RegisterSyntaxNodeAction(syntaxNodeContext =>
{
var methodSyntax = (MethodDeclarationSyntax)syntaxNodeContext.Node;
var semanticModel = syntaxNodeContext.SemanticModel;
var method = semanticModel.GetDeclaredSymbol(methodSyntax, syntaxNodeContext.CancellationToken);
if (!ShouldEvaluateMethod(symbolCache, method))
{
return;
}
var conventionAttributes = GetConventionTypeAttributes(symbolCache, method);
var expectedResponseMetadata = SymbolApiResponseMetadataProvider.GetResponseMetadata(symbolCache, method, conventionAttributes);
var actualResponseMetadata = new HashSet <int>();
var context = new ApiConventionContext(
symbolCache,
syntaxNodeContext,
expectedResponseMetadata,
actualResponseMetadata);
var hasUndocumentedStatusCodes = false;
foreach (var returnStatementSyntax in methodSyntax.DescendantNodes(_shouldDescendIntoChildren).OfType <ReturnStatementSyntax>())
{
hasUndocumentedStatusCodes |= VisitReturnStatementSyntax(context, returnStatementSyntax);
}
if (hasUndocumentedStatusCodes)
{
// If we produced analyzer warnings about undocumented status codes, don't attempt to determine
// if there are documented status codes that are missing from the method body.
return;
}
for (var i = 0; i < expectedResponseMetadata.Count; i++)
{
var expectedStatusCode = expectedResponseMetadata[i].StatusCode;
if (!actualResponseMetadata.Contains(expectedStatusCode))
{
context.SyntaxNodeContext.ReportDiagnostic(Diagnostic.Create(
DiagnosticDescriptors.MVC1006_ActionDoesNotReturnDocumentedStatusCode,
methodSyntax.Identifier.GetLocation(),
expectedStatusCode));
}
}
}, SyntaxKind.MethodDeclaration);
}
private void InitializeWorker(CompilationStartAnalysisContext compilationStartAnalysisContext, ApiControllerSymbolCache symbolCache)
{
compilationStartAnalysisContext.RegisterSyntaxNodeAction(syntaxNodeContext =>
{
var cancellationToken = syntaxNodeContext.CancellationToken;
var methodSyntax = (MethodDeclarationSyntax)syntaxNodeContext.Node;
var semanticModel = syntaxNodeContext.SemanticModel;
var method = semanticModel.GetDeclaredSymbol(methodSyntax, syntaxNodeContext.CancellationToken);
if (!ApiControllerFacts.IsApiControllerAction(symbolCache, method))
{
return;
}
var conventionAttributes = GetConventionTypeAttributes(symbolCache, method);
var declaredResponseMetadata = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, conventionAttributes);
var hasUnreadableStatusCodes = SymbolApiResponseMetadataProvider.TryGetActualResponseMetadata(symbolCache, semanticModel, methodSyntax, cancellationToken, out var actualResponseMetadata);
var hasUndocumentedStatusCodes = false;
foreach (var item in actualResponseMetadata)
{
var location = item.ReturnStatement.GetLocation();
if (item.IsDefaultResponse)
{
if (!(HasStatusCode(declaredResponseMetadata, 200) || HasStatusCode(declaredResponseMetadata, 201)))
{
hasUndocumentedStatusCodes = true;
syntaxNodeContext.ReportDiagnostic(Diagnostic.Create(
DiagnosticDescriptors.MVC1005_ActionReturnsUndocumentedSuccessResult,
location));
}
}
else if (!HasStatusCode(declaredResponseMetadata, item.StatusCode))
{
hasUndocumentedStatusCodes = true;
syntaxNodeContext.ReportDiagnostic(Diagnostic.Create(
DiagnosticDescriptors.MVC1004_ActionReturnsUndocumentedStatusCode,
location,
item.StatusCode));
}
}
if (hasUndocumentedStatusCodes || hasUnreadableStatusCodes)
{
// If we produced analyzer warnings about undocumented status codes, don't attempt to determine
// if there are documented status codes that are missing from the method body.
return;
}
for (var i = 0; i < declaredResponseMetadata.Count; i++)
{
var expectedStatusCode = declaredResponseMetadata[i].StatusCode;
if (!HasStatusCode(actualResponseMetadata, expectedStatusCode))
{
syntaxNodeContext.ReportDiagnostic(Diagnostic.Create(
DiagnosticDescriptors.MVC1006_ActionDoesNotReturnDocumentedStatusCode,
methodSyntax.Identifier.GetLocation(),
expectedStatusCode));
}
}
}, SyntaxKind.MethodDeclaration);
}
private void InitializeWorker(CompilationStartAnalysisContext context, ApiControllerSymbolCache symbolCache)
{
context.RegisterOperationAction(operationAnalysisContext =>
{
var ifOperation = (IConditionalOperation)operationAnalysisContext.Operation;
if (!(ifOperation.Syntax is IfStatementSyntax ifStatement))
{
return;
}
if (ifOperation.WhenTrue == null || ifOperation.WhenFalse != null)
{
// We only support expressions of the format
// if (!ModelState.IsValid)
// or
// if (ModelState.IsValid == false)
// If the conditional is misisng a true condition or has an else expression, skip this operation.
return;
}
var parent = ifOperation.Parent;
if (parent?.Kind == OperationKind.Block)
{
parent = parent?.Parent;
}
if (parent?.Kind != OperationKind.MethodBodyOperation)
{
// Only support top-level ModelState IsValid checks.
return;
}
var trueStatement = UnwrapSingleStatementBlock(ifOperation.WhenTrue);
if (trueStatement.Kind != OperationKind.Return)
{
// We need to verify that the if statement does a ModelState.IsValid check and that the block inside contains
// a single return statement returning a 400. We'l get to it in just a bit
return;
}
if (!(parent.Syntax is MethodDeclarationSyntax methodSyntax))
{
return;
}
var semanticModel = operationAnalysisContext.Compilation.GetSemanticModel(methodSyntax.SyntaxTree);
var methodSymbol = semanticModel.GetDeclaredSymbol(methodSyntax, operationAnalysisContext.CancellationToken);
if (!ApiControllerFacts.IsApiControllerAction(symbolCache, methodSymbol))
{
// Not a ApiController. Nothing to do here.
return;
}
if (!IsModelStateIsValidCheck(symbolCache, ifOperation.Condition))
{
return;
}
var returnOperation = (IReturnOperation)trueStatement;
var returnValue = returnOperation.ReturnedValue;
if (returnValue == null ||
!symbolCache.IActionResult.IsAssignableFrom(returnValue.Type))
{
return;
}
var returnStatementSyntax = (ReturnStatementSyntax)returnOperation.Syntax;
var actualMetadata = SymbolApiResponseMetadataProvider.InspectReturnStatementSyntax(
symbolCache,
semanticModel,
returnStatementSyntax,
operationAnalysisContext.CancellationToken);
if (actualMetadata == null || actualMetadata.Value.StatusCode != 400)
{
return;
}
var additionalLocations = new[]
{
ifStatement.GetLocation(),
returnStatementSyntax.GetLocation(),
};
operationAnalysisContext.ReportDiagnostic(
Diagnostic.Create(
DiagnosticDescriptors.MVC1007_ApiActionsDoNotRequireExplicitModelValidationCheck,
ifStatement.GetLocation(),
additionalLocations: additionalLocations));
}, OperationKind.Conditional);
}
private static IList <DeclaredApiResponseMetadata> GetResponseMetadataFromMethodAttributes(ApiControllerSymbolCache symbolCache, IMethodSymbol methodSymbol)
{
var metadataItems = new List <DeclaredApiResponseMetadata>();
var responseMetadataAttributes = methodSymbol.GetAttributes(symbolCache.ProducesResponseTypeAttribute, inherit: true);
foreach (var attribute in responseMetadataAttributes)
{
var statusCode = GetStatusCode(attribute);
var metadata = new DeclaredApiResponseMetadata(statusCode, attribute, convention: null);
metadataItems.Add(metadata);
}
return(metadataItems);
}