n8n-expression-testing

Expression validation checks your n8n syntax and context variable usage ($json, $node, $items) to catch errors before runtime. This Skill tests expressions against multiple context scenarios, ensuring they handle data safely and execute without failure.

Common pitfalls include unsafe null access, type mismatches, and incorrect context variable references. This Skill validates null handling, type safety, and proper data access patterns across your expressions to prevent runtime failures.

Yes. This Skill enforces safe data access patterns and checks for security vulnerabilities while assessing expression efficiency. It combines validation, context testing, and performance considerations to ensure robust transformations.

Context validation tests your expression against $json, $node, $items and other context variables to verify correct usage. This Skill validates that your references match available data and prevents context-related runtime errors.

Validate syntax correctness, context variable accuracy, null safety, type handling, and security patterns. This Skill provides comprehensive testing across all these areas to ensure expressions work reliably in production workflows.