public async Task GetResponseMetadata_ReturnsValuesFromApiConventionMethodAttribute()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.GetResponseMetadata_ReturnsValuesFromApiConventionMethodAttribute)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Collection(
result,
metadata =>
{
Assert.Equal(200, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
},
metadata =>
{
Assert.Equal(404, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
});
}
private async Task GetStatusCodeTest(string actionName, int expected)
{
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(actionName).First();
var attribute = method.GetAttributes().First();
var statusCode = SymbolApiResponseMetadataProvider.GetStatusCode(attribute);
Assert.Equal(expected, statusCode);
}
public async Task GetDefaultStatusCode_ReturnsValueDefinedUsingHttpStatusCast()
{
// Arrange
var compilation = await GetCompilation("GetDefaultStatusCodeTest");
var attribute = compilation.GetTypeByMetadataName(typeof(TestActionResultUsingHttpStatusCodeCast).FullName).GetAttributes()[0];
// Act
var actual = SymbolApiResponseMetadataProvider.GetDefaultStatusCode(attribute);
// Assert
Assert.Equal(302, actual);
}
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);
}
public async Task GetResponseMetadata_IgnoresProducesAttribute()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.ActionWithProducesAttribute)).First();
var symbolCache = new ApiControllerSymbolCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetDeclaredResponseMetadata(symbolCache, method, Array.Empty <AttributeData>());
// Assert
Assert.Empty(result);
}
public async Task GetResponseMetadata_ReturnsEmptySequence_IfNoAttributesArePresent_ForPostAction()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{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 GetResponseMetadata_IgnoresCustomResponseTypeMetadataProvider()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.ActionWithCustomApiResponseMetadataProvider)).First();
var typeCache = new ApiControllerTypeCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetResponseMetadata(typeCache, method);
// Assert
Assert.Empty(result);
}
private async Task <ActualApiResponseMetadata?> RunInspectReturnStatementSyntax(string source, string test)
{
var project = DiagnosticProject.Create(GetType().Assembly, new[] { source });
var compilation = await project.GetCompilationAsync();
var symbolCache = new ApiControllerSymbolCache(compilation);
var returnType = compilation.GetTypeByMetadataName($"{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);
});
}
public async Task GetResponseMetadata_ReturnsValueFromCustomProducesResponseType()
{
// Arrange
var compilation = await GetResponseMetadataCompilation();
var controller = compilation.GetTypeByMetadataName($"{Namespace}.{nameof(GetResponseMetadata_ControllerActionWithAttributes)}");
var method = (IMethodSymbol)controller.GetMembers(nameof(GetResponseMetadata_ControllerActionWithAttributes.ActionWithCustomProducesResponseTypeAttributeWithArguments)).First();
var typeCache = new ApiControllerTypeCache(compilation);
// Act
var result = SymbolApiResponseMetadataProvider.GetResponseMetadata(typeCache, method);
// Assert
Assert.Collection(
result,
metadata =>
{
Assert.Equal(201, metadata.StatusCode);
Assert.NotNull(metadata.Attribute);
Assert.Null(metadata.Convention);
});
}
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);
}
