refactor: Overhaul nodes-testing setup - Part 1 (no-changelog) (#14303)

packages/core/src/constants.ts

@@ -1,6 +1,7 @@
 const { NODE_ENV } = process.env;
 export const inProduction = NODE_ENV === 'production';
 export const inDevelopment = !NODE_ENV || NODE_ENV === 'development';
+export const inTest = NODE_ENV === 'test';
 
 export const CUSTOM_EXTENSION_ENV = 'N8N_CUSTOM_EXTENSIONS';
 export const PLACEHOLDER_EMPTY_EXECUTION_ID = '__UNKNOWN__';