fix( Switch Node): Disable expressions for Number of Outputs in v3.3 (#19075)

Co-authored-by: Roman Davydchuk <roman.davydchuk@n8n.io>

packages/nodes-base/nodes/Switch/V3/test/switch.node.test.ts

@@ -1,5 +1,57 @@
 import { NodeTestHarness } from '@nodes-testing/node-test-harness';
+import type { INodeTypeBaseDescription } from 'n8n-workflow';
+
+import { SwitchV3 } from '../SwitchV3.node';
 
 describe('Execute Switch Node', () => {
 	new NodeTestHarness().setupTests();
+
+	describe('Version-specific behavior', () => {
+		const baseDescription: INodeTypeBaseDescription = {
+			displayName: 'Switch',
+			name: 'n8n-nodes-base.switch',
+			group: ['transform'],
+			description: 'Route items to different outputs',
+		};
+
+		it('should have two numberOutputs parameters with different version conditions', () => {
+			const switchNode = new SwitchV3(baseDescription);
+			const numberOutputsParams = switchNode.description.properties.filter(
+				(prop) => prop.name === 'numberOutputs',
+			);
+
+			expect(numberOutputsParams).toHaveLength(2);
+		});
+
+		it('should have noDataExpression: true for version 3.3+ numberOutputs parameter', () => {
+			const switchNode = new SwitchV3(baseDescription);
+			const numberOutputsParamWithNoExpression = switchNode.description.properties.find(
+				(prop) => prop.name === 'numberOutputs' && prop.noDataExpression === true,
+			);
+
+			expect(numberOutputsParamWithNoExpression).toBeDefined();
+			expect(numberOutputsParamWithNoExpression?.noDataExpression).toBe(true);
+			expect(numberOutputsParamWithNoExpression?.displayOptions?.show?.['@version']).toEqual([
+				{ _cnd: { gte: 3.3 } },
+			]);
+		});
+
+		it('should have numberOutputs parameter without noDataExpression for older versions', () => {
+			const switchNode = new SwitchV3(baseDescription);
+			const numberOutputsParamWithoutNoExpression = switchNode.description.properties.find(
+				(prop) => prop.name === 'numberOutputs' && !prop.noDataExpression,
+			);
+
+			expect(numberOutputsParamWithoutNoExpression).toBeDefined();
+			expect(numberOutputsParamWithoutNoExpression?.noDataExpression).toBeUndefined();
+			expect(numberOutputsParamWithoutNoExpression?.displayOptions?.show?.['@version']).toEqual([
+				{ _cnd: { lt: 3.3 } },
+			]);
+		});
+
+		it('should include version 3.3 in supported versions', () => {
+			const switchNode = new SwitchV3(baseDescription);
+			expect(switchNode.description.version).toContain(3.3);
+		});
+	});
 });