n8n Expression Testing

<default_to_action> When testing n8n expressions:

1. VALIDATE syntax before execution
2. TEST with multiple context scenarios
3. CHECK for null/undefined handling
4. VERIFY type safety
5. SCAN for security vulnerabilities

Quick Expression Checklist:

• Valid JavaScript syntax
• Context variables properly referenced ($json, $node)
• Null-safe access patterns (?., ??)
• No dangerous functions (eval, Function)
• Efficient for large data sets

Common Pitfalls:

• Accessing nested properties without null checks