* 🧪 Add base for building unit testing within nodes
* Improve helper functions
* 🧪 If node test
* 🧪 Airtable node test
* 🧪 If node test improvements
* 🧪 Airtable node test improvements
* ♻️ cleanup node unit tests
* ♻️ refactor getting node result data to use helper method
* ⚡ removed unused variables
* ♻️ Helper to read json files
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Co-authored-by: Marcus <marcus@n8n.io>
Co-authored-by: Michael Kret <michael.k@radency.com>
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