add a simple unit test

packages/workflow/test/errors/node.error.test.ts

@@ -0,0 +1,16 @@
+import { mock } from 'jest-mock-extended';
+import type { INode } from '@/Interfaces';
+import { NodeApiError } from '@/errors/node-api.error';
+import { NodeOperationError } from '@/errors/node-operation.error';
+
+describe('NodeError', () => {
+	const node = mock<INode>();
+
+	it('should prevent errors from being re-wrapped', () => {
+		const apiError = new NodeApiError(node, mock({ message: 'Some error happened', code: 500 }));
+		const opsError = new NodeOperationError(node, mock());
+
+		expect(new NodeOperationError(node, apiError)).toEqual(apiError);
+		expect(new NodeOperationError(node, opsError)).toEqual(opsError);
+	});
+});