public static BlockSyntax GetInvocationBlockSyntax(string delegateTypeName, string methodName, string parameters,
IEnumerable <IParameterSymbol> outParameters, ITypeSymbol returnType, SemanticModel semanticModel)
{
var voidType = semanticModel.Compilation.GetTypeByMetadataName("System.Void");
bool returnsVoid = returnType.Equals(voidType);
var statements = new List <StatementSyntax>();
string returnStatement = returnsVoid ? string.Empty : "return ";
statements.Add(SF.ParseStatement($"{delegateTypeName} del;{System.Environment.NewLine}"));
// Prepare if/else block to determine how uninitialized stubs are handled.
var ifStrictExpression = SF.ParseExpression("MockBehavior == MockBehavior.Strict");
var ifStrictTrueSyntax = SF.Block(SF.ParseStatement($"del = _stubs.GetMethodStub<{delegateTypeName}>(\"{methodName}\");{System.Environment.NewLine}"));
var defaultReturnInvocation = outParameters.Select(p =>
SF.ParseStatement($"{p.Name} = default ({p.Type.GetGenericName()});")).ToList();
if (!returnsVoid)
{
defaultReturnInvocation.Add(SF.ParseStatement(GetDefaultReturnInvocationStatement(returnType, semanticModel)));
}
else
{
defaultReturnInvocation.Add(SF.ParseStatement($"return;{System.Environment.NewLine}"));
}
var ifTryGetMethodStubExpression = SF.ParseExpression($"!_stubs.TryGetMethodStub<{delegateTypeName}>(\"{methodName}\", out del)");
var ifStrictFalseSyntax = SF.Block(SF.IfStatement(ifTryGetMethodStubExpression, SF.Block(defaultReturnInvocation)));
statements.Add(SF.IfStatement(ifStrictExpression, ifStrictTrueSyntax, SF.ElseClause(ifStrictFalseSyntax)));
// Add default invocation.
statements.Add(SF.ParseStatement($"{returnStatement}del.Invoke({parameters});{System.Environment.NewLine}"));
return(SF.Block(statements.ToArray()));
}