public override SyntaxNode VisitPrefixUnaryExpression(PrefixUnaryExpressionSyntax node)
{
SyntaxToken preFixUnaryOperator = node.OperatorToken;
SyntaxToken newToken = SyntaxFactory.Token(SyntaxKind.None);
// ++ becomes --
if (preFixUnaryOperator.IsKind(SyntaxKind.PlusPlusToken))
{
newToken = SyntaxFactory.Token(SyntaxKind.MinusMinusToken)
.WithTrailingTrivia(SyntaxFactory.Space);
}
// -- becomes ++
if (preFixUnaryOperator.IsKind(SyntaxKind.MinusMinusToken))
{
newToken = SyntaxFactory.Token(SyntaxKind.PlusPlusToken)
.WithTrailingTrivia(SyntaxFactory.Space);
}
if (!newToken.IsKind(SyntaxKind.None))
{
var mutatedBinaryExressionNode = node.ReplaceToken(preFixUnaryOperator, newToken);
var mutatedClassRoot = _classRootNode.ReplaceNode(node, mutatedBinaryExressionNode);
_mutantCreator.CreateNewMutant(mutatedClassRoot, false);
}
return(node);
}