internal static bool IsAssignedAndDisposedInSetupAndTearDown(ISymbol fieldOrProperty, TypeDeclarationSyntax scope, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (fieldOrProperty == null)
{
return(false);
}
if (AssignmentWalker.SingleForSymbol(fieldOrProperty, scope, Search.TopLevel, semanticModel, cancellationToken, out var assignment) &&
assignment.FirstAncestor <MethodDeclarationSyntax>() is MethodDeclarationSyntax methodDeclaration)
{
if (Attribute.TryGetAttribute(methodDeclaration, KnownSymbol.NUnitSetUpAttribute, semanticModel, cancellationToken, out _))
{
if (fieldOrProperty.ContainingType.TryFirstMethodRecursive(
x => x.GetAttributes().Any(a => a.AttributeClass == KnownSymbol.NUnitTearDownAttribute),
out var tearDown))
{
return(RefCounter.IsMemberDisposed(fieldOrProperty, tearDown, semanticModel, cancellationToken));
}
}
if (Attribute.TryGetAttribute(methodDeclaration, KnownSymbol.NUnitOneTimeSetUpAttribute, semanticModel, cancellationToken, out _))
{
if (fieldOrProperty.ContainingType.TryFirstMethodRecursive(
x => x.GetAttributes().Any(a => a.AttributeClass == KnownSymbol.NUnitOneTimeTearDownAttribute),
out var tearDown))
{
return(RefCounter.IsMemberDisposed(fieldOrProperty, tearDown, semanticModel, cancellationToken));
}
}
}
return(false);
}
internal static bool TryGetAssignment(this BlockSyntax body, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken, List <AssignmentExpressionSyntax> result)
{
if (symbol == null)
{
return(false);
}
AssignmentWalker.AllWith(symbol, body, Search.TopLevel, semanticModel, cancellationToken, result);
return(true);
}
internal static bool TryGetAssignment(this BlockSyntax body, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken, out AssignmentExpressionSyntax result)
{
result = null;
if (symbol == null)
{
return(false);
}
return(AssignmentWalker.FirstWith(symbol, body, Search.TopLevel, semanticModel, cancellationToken, out result));
}
internal static bool IsAssignedInSetUp(ISymbol fieldOrProperty, TypeDeclarationSyntax scope, SemanticModel semanticModel, CancellationToken cancellationToken, out AttributeSyntax attribute)
{
if (AssignmentWalker.SingleForSymbol(fieldOrProperty, scope, Search.TopLevel, semanticModel, cancellationToken, out var assignment) &&
assignment.FirstAncestor <MethodDeclarationSyntax>() is MethodDeclarationSyntax methodDeclaration)
{
return(Attribute.TryGetAttribute(methodDeclaration, KnownSymbol.NUnitSetUpAttribute, semanticModel, cancellationToken, out attribute) ||
Attribute.TryGetAttribute(methodDeclaration, KnownSymbol.NUnitOneTimeSetUpAttribute, semanticModel, cancellationToken, out attribute));
}
attribute = null;
return(false);
}
internal static bool AssignsSymbolInSetter(IPropertySymbol property, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
var setMethod = property?.SetMethod;
if (setMethod == null ||
setMethod.DeclaringSyntaxReferences.Length == 0)
{
return(false);
}
if (TryGetSetter(property, cancellationToken, out var setter))
{
if (AssignmentWalker.FirstForSymbol(symbol, setter, Search.Recursive, semanticModel, cancellationToken))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Check if any path returns a created IDisposable
/// </summary>
internal static Result IsAssignedWithCreated(ExpressionSyntax disposable, SemanticModel semanticModel, CancellationToken cancellationToken, out ISymbol assignedSymbol)
{
if (!IsPotentiallyAssignableTo(disposable, semanticModel, cancellationToken))
{
assignedSymbol = null;
return(Result.No);
}
if (semanticModel.GetSymbolSafe(disposable, cancellationToken) is IPropertySymbol property &&
property.TryGetSetter(cancellationToken, out var setter))
{
using (var pooledSet = PooledHashSet <ISymbol> .Borrow())
{
using (var pooledAssigned = AssignmentWalker.Borrow(setter, Search.Recursive, semanticModel, cancellationToken))
{
foreach (var assigned in pooledAssigned.Assignments)
{
var symbol = semanticModel.GetSymbolSafe(assigned.Left, cancellationToken);
if (IsPotentiallyAssignableTo(assigned.Left, semanticModel, cancellationToken) &&
(symbol is IFieldSymbol ||
symbol is IPropertySymbol))
{
pooledSet.Add(symbol).IgnoreReturnValue();
}
}
}
assignedSymbol = null;
var result = Result.No;
foreach (var symbol in pooledSet)
{
switch (IsAssignedWithCreated(symbol, disposable, semanticModel, cancellationToken))
{
case Result.Unknown:
if (result == Result.No)
{
assignedSymbol = symbol;
result = Result.Unknown;
}
break;
case Result.Yes:
assignedSymbol = symbol;
return(Result.Yes);
case Result.AssumeYes:
assignedSymbol = symbol;
result = Result.AssumeYes;
break;
case Result.No:
case Result.AssumeNo:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
return(result);
}
}
using (var assignedValues = AssignedValueWalker.Borrow(disposable, semanticModel, cancellationToken))
{
assignedSymbol = assignedValues.CurrentSymbol;
if (assignedValues.Count == 1 &&
disposable.Parent is AssignmentExpressionSyntax assignment &&
assignment.Parent is ParenthesizedExpressionSyntax parenthesizedExpression &&
parenthesizedExpression.Parent is BinaryExpressionSyntax binary &&
binary.IsKind(SyntaxKind.CoalesceExpression))
{
return(Result.No);
}
using (var recursive = RecursiveValues.Create(assignedValues, semanticModel, cancellationToken))
{
return(IsAnyCreation(recursive, semanticModel, cancellationToken));
}
}
}