test: Add unit testing to nodes (no-changelog) (#4890)

* 🧪 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

---------

Co-authored-by: Marcus <marcus@n8n.io>
Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/test/nodes/ExecuteWorkflow.ts

@@ -0,0 +1,24 @@
+import { WorkflowExecute } from 'n8n-core';
+import { createDeferredPromise, INodeTypes, IRun, Workflow } from 'n8n-workflow';
+import * as Helpers from './Helpers';
+
+export async function executeWorkflow(testData, nodeTypes: INodeTypes) {
+	const executionMode = 'manual';
+	const workflowInstance = new Workflow({
+		id: 'test',
+		nodes: testData.input.workflowData.nodes,
+		connections: testData.input.workflowData.connections,
+		active: false,
+		nodeTypes,
+	});
+
+	const waitPromise = await createDeferredPromise<IRun>();
+	const nodeExecutionOrder: string[] = [];
+	const additionalData = Helpers.WorkflowExecuteAdditionalData(waitPromise, nodeExecutionOrder);
+
+	const workflowExecute = new WorkflowExecute(additionalData, executionMode);
+
+	const executionData = await workflowExecute.run(workflowInstance);
+	const result = await waitPromise.promise();
+	return { executionData, result, nodeExecutionOrder };
+}