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packages/core/nodes-testing/test-data-node.ts

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+import type {
+	IDataObject,
+	IExecuteFunctions,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+} from 'n8n-workflow';
+import { NodeConnectionTypes } from 'n8n-workflow';
+
+/**
+ * A lightweight test-only node that outputs static JSON data.
+ * Used in test workflow JSON files as a replacement for Code nodes
+ * that merely return hardcoded data. Accepts a `data` parameter
+ * containing a JSON array (or single object) and emits each element
+ * as a workflow item. No sandbox or code execution involved.
+ */
+export class TestDataNode implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Test Data',
+		name: 'testData',
+		group: ['input'],
+		version: 1,
+		description: 'Provides static test data',
+		defaults: { name: 'Test Data' },
+		inputs: [NodeConnectionTypes.Main],
+		outputs: [NodeConnectionTypes.Main],
+		properties: [
+			{
+				displayName: 'Data',
+				name: 'data',
+				type: 'json',
+				default: '[]',
+				description: 'JSON array of items to output',
+			},
+		],
+	};
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		const raw = this.getNodeParameter('data', 0);
+		const parsed = typeof raw === 'string' ? JSON.parse(raw) : raw;
+		const items: IDataObject[] = Array.isArray(parsed) ? parsed : [parsed];
+		return [items.map((item) => ({ json: item }))];
+	}
+}