private static IEnumerable<Fields> GetUsings(ExpressionSyntax expression, ISymbol symbol, SutInfo suitableSut, SemanticModel semanticModel, Dictionary<string, ITypeSymbol> sutSubstitutions)
{
var syntax = expression.Parents(x => (x as UsingStatementSyntax)?.Declaration
.Variables
.Any(y => y.DescendantNodes()
.Any(z => z == expression)) == true) as UsingStatementSyntax;
if (syntax == null) return Enumerable.Empty<Fields>();
var methodSymbol = symbol as IMethodSymbol;
var propertySymbol = symbol as IPropertySymbol;
if (methodSymbol == null && propertySymbol == null)
return Enumerable.Empty<Fields>();
var containingType = (methodSymbol?.ReturnType ?? propertySymbol?.GetMethod?.ReturnType);
var disposable = containingType?.Interfaces.FirstOrDefault(x => x.Name == "IDisposable");
if(disposable == null)
return Enumerable.Empty<Fields>();
var disposeMethod = disposable.GetMembers("Dispose").First();
return syntax.Declaration.Variables.Select(x => new Fields
{
Expression = expression,
MethodOrPropertySymbol = disposeMethod,
FieldsToSetup = GetFieldsToSetup(suitableSut, semanticModel, containingType, sutSubstitutions)
});
}