private SyntaxNode MutateForStatement(ForStatementSyntax forStatement, MutationContext context)
{
// for needs special treatments for its incrementors
StatementSyntax forWithMutantIncrementors = forStatement.TrackNodes(forStatement);
foreach (var incrementor in forStatement.Incrementors)
{
forWithMutantIncrementors = MutateSubExpressionWithIfStatements(forStatement, forWithMutantIncrementors, incrementor, context);
}
var originalFor = forWithMutantIncrementors.GetCurrentNode(forStatement);
// mutate condition, if any
ForStatementSyntax mutatedFor;
StatementSyntax statementPart;
if (forStatement.Condition == null)
{
mutatedFor = forStatement;
statementPart = forStatement.Statement;
}
else
{
mutatedFor = forStatement.TrackNodes(forStatement.Condition, forStatement.Statement);
mutatedFor = mutatedFor.ReplaceNode(mutatedFor.GetCurrentNode(forStatement.Condition),
Mutate(forStatement.Condition, context));
statementPart = mutatedFor.GetCurrentNode(forStatement.Statement);
}
// mutate the statement/block
mutatedFor = mutatedFor.ReplaceNode(statementPart, Mutate(forStatement.Statement, context));
// and now we replace it
return(forWithMutantIncrementors.ReplaceNode(originalFor, mutatedFor));
}
private SyntaxNode MutateForStatement(ForStatementSyntax forStatement)
{
// for needs special treatments for its incrementors
StatementSyntax forWithMutantIncrementors = forStatement.TrackNodes(forStatement);
foreach (var incrementor in forStatement.Incrementors)
{
forWithMutantIncrementors = MutateSubExpressionWithIfStatements(forStatement, forWithMutantIncrementors, incrementor);
}
var originalFor = forWithMutantIncrementors.GetCurrentNode(forStatement);
// now we generate a mutant for the remainder of the for statement
ForStatementSyntax mutatedFor;
StatementSyntax statementPart;
if (forStatement.Condition == null)
{
mutatedFor = forStatement;
statementPart = forStatement.Statement;
}
else
{
mutatedFor = forStatement.TrackNodes(forStatement.Condition, forStatement.Statement);
mutatedFor = mutatedFor.ReplaceNode(mutatedFor.GetCurrentNode(forStatement.Condition),
Mutate(forStatement.Condition));
statementPart = mutatedFor.GetCurrentNode(forStatement.Statement);
}
mutatedFor = mutatedFor.ReplaceNode(statementPart,
Mutate(forStatement.Statement));
// and now we replace it
return(forWithMutantIncrementors.ReplaceNode(originalFor, mutatedFor));
}
