mirror of
https://github.com/czlonkowski/n8n-mcp.git
synced 2026-01-29 22:12:05 +00:00
aeb74102e5
CRITICAL BUG FIX: Fixed array index corruption in multi-output nodes (Switch, IF with multiple handlers, Merge) when rewiring connections. Problem: - applyRemoveConnection() filtered out empty arrays after removing connections - This caused indices to shift in multi-output nodes - Example: Switch.main = [[H0], [H1], [H2]] -> remove H1 -> [[H0], [H2]] - H2 moved from index 2 to index 1, corrupting workflow structure Root Cause: ```typescript // Line 697 - BUGGY CODE: workflow.connections[node][output] = connections.filter(conns => conns.length > 0); ``` Solution: - Only remove trailing empty arrays - Preserve intermediate empty arrays to maintain index integrity - Example: [[H0], [], [H2]] stays [[H0], [], [H2]] not [[H0], [H2]] Impact: - Prevents production-breaking workflow corruption - Fixes rewireConnection operation for multi-output nodes - Critical for AI agents working with complex workflows Testing: - Added integration test for Switch node rewiring with array index verification - Test creates 4-output Switch node, rewires middle connection - Verifies indices 0, 2, 3 unchanged after rewiring index 1 - All 137 unit tests + 12 integration tests passing Discovered by: @agent-n8n-mcp-tester during comprehensive testing Issue: #272 (Connection Operations - Phase 1) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
1506 lines
48 KiB
TypeScript
1506 lines
48 KiB
TypeScript
/**
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* Integration Tests: Smart Parameters with Real n8n API
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*
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* These tests verify that smart parameters (branch='true'/'false', case=N)
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* correctly map to n8n's actual connection structure when tested against
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* a real n8n instance.
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*
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* CRITICAL: These tests validate against REAL n8n connection structure:
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* ✅ workflow.connections.IF.main[0] (correct)
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* ❌ workflow.connections.IF.true (wrong - what unit tests did)
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*
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* These integration tests would have caught the bugs that unit tests missed:
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* - Bug 1: branch='true' mapping to sourceOutput instead of sourceIndex
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* - Bug 2: Zod schema stripping branch/case parameters
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*/
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import { describe, it, expect, beforeEach, afterEach, afterAll } from 'vitest';
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import { createTestContext, TestContext, createTestWorkflowName } from '../utils/test-context';
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import { getTestN8nClient } from '../utils/n8n-client';
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import { N8nApiClient } from '../../../../src/services/n8n-api-client';
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import { cleanupOrphanedWorkflows } from '../utils/cleanup-helpers';
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import { createMcpContext } from '../utils/mcp-context';
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import { InstanceContext } from '../../../../src/types/instance-context';
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import { handleUpdatePartialWorkflow } from '../../../../src/mcp/handlers-workflow-diff';
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import { Workflow } from '../../../../src/types/n8n-api';
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describe('Integration: Smart Parameters with Real n8n API', () => {
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let context: TestContext;
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let client: N8nApiClient;
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let mcpContext: InstanceContext;
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beforeEach(() => {
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context = createTestContext();
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client = getTestN8nClient();
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mcpContext = createMcpContext();
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});
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afterEach(async () => {
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await context.cleanup();
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});
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afterAll(async () => {
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if (!process.env.CI) {
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await cleanupOrphanedWorkflows();
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}
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});
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// ======================================================================
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// TEST 1: IF node with branch='true'
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// ======================================================================
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describe('IF Node Smart Parameters', () => {
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it('should handle branch="true" with real n8n API', async () => {
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// Create minimal workflow with IF node
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const workflowName = createTestWorkflowName('Smart Params - IF True Branch');
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const workflow = await client.createWorkflow({
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name: workflowName,
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nodes: [
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{
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id: 'manual-1',
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name: 'Manual',
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type: 'n8n-nodes-base.manualTrigger',
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typeVersion: 1,
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position: [250, 300],
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parameters: {}
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},
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{
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id: 'if-1',
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name: 'IF',
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type: 'n8n-nodes-base.if',
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typeVersion: 2,
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position: [450, 300],
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parameters: {
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conditions: {
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conditions: [
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{
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id: 'cond-1',
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leftValue: '={{ $json.value }}',
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rightValue: 'test',
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operation: 'equal'
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}
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]
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}
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}
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}
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],
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connections: {
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Manual: {
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main: [[{ node: 'IF', type: 'main', index: 0 }]]
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}
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},
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tags: ['mcp-integration-test']
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});
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expect(workflow.id).toBeTruthy();
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if (!workflow.id) throw new Error('Workflow ID is missing');
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context.trackWorkflow(workflow.id);
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// Add TrueHandler node and connection using branch='true' smart parameter
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const result = await handleUpdatePartialWorkflow(
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{
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id: workflow.id,
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operations: [
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{
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type: 'addNode',
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node: {
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name: 'TrueHandler',
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type: 'n8n-nodes-base.set',
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typeVersion: 3.4,
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position: [650, 200],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-1',
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name: 'handled',
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value: 'true',
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type: 'string'
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}
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]
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}
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}
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}
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},
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{
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type: 'addConnection',
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source: 'IF',
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target: 'TrueHandler',
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branch: 'true' // Smart parameter
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}
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]
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},
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mcpContext
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);
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expect(result.success).toBe(true);
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// Fetch actual workflow from n8n API
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const fetchedWorkflow = await client.getWorkflow(workflow.id);
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// CRITICAL: Assert REAL n8n connection structure
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// The connection should be at index 0 of main output array (true branch)
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expect(fetchedWorkflow.connections.IF).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[0]).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[0].length).toBe(1);
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expect(fetchedWorkflow.connections.IF.main[0][0].node).toBe('TrueHandler');
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expect(fetchedWorkflow.connections.IF.main[0][0].type).toBe('main');
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// Verify false branch (index 1) is empty or undefined
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expect(fetchedWorkflow.connections.IF.main[1] || []).toHaveLength(0);
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});
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// ======================================================================
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// TEST 2: IF node with branch='false'
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// ======================================================================
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it('should handle branch="false" with real n8n API', async () => {
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// Create minimal workflow with IF node
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const workflowName = createTestWorkflowName('Smart Params - IF False Branch');
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const workflow = await client.createWorkflow({
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name: workflowName,
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nodes: [
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{
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id: 'manual-1',
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name: 'Manual',
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type: 'n8n-nodes-base.manualTrigger',
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typeVersion: 1,
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position: [250, 300],
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parameters: {}
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},
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{
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id: 'if-1',
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name: 'IF',
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type: 'n8n-nodes-base.if',
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typeVersion: 2,
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position: [450, 300],
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parameters: {
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conditions: {
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conditions: [
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{
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id: 'cond-1',
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leftValue: '={{ $json.value }}',
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rightValue: 'test',
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operation: 'equal'
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}
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]
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}
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}
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}
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],
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connections: {
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Manual: {
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main: [[{ node: 'IF', type: 'main', index: 0 }]]
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}
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},
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tags: ['mcp-integration-test']
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});
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expect(workflow.id).toBeTruthy();
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if (!workflow.id) throw new Error('Workflow ID is missing');
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context.trackWorkflow(workflow.id);
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// Add FalseHandler node and connection using branch='false' smart parameter
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const result = await handleUpdatePartialWorkflow(
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{
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id: workflow.id,
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operations: [
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{
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type: 'addNode',
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node: {
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name: 'FalseHandler',
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type: 'n8n-nodes-base.set',
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typeVersion: 3.4,
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position: [650, 400],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-1',
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name: 'handled',
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value: 'false',
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type: 'string'
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}
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]
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}
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}
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}
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},
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{
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type: 'addConnection',
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source: 'IF',
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target: 'FalseHandler',
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branch: 'false' // Smart parameter
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}
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]
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},
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mcpContext
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);
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expect(result.success).toBe(true);
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// Fetch actual workflow from n8n API
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const fetchedWorkflow = await client.getWorkflow(workflow.id);
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// CRITICAL: Assert REAL n8n connection structure
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// The connection should be at index 1 of main output array (false branch)
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expect(fetchedWorkflow.connections.IF).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[1]).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[1].length).toBe(1);
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expect(fetchedWorkflow.connections.IF.main[1][0].node).toBe('FalseHandler');
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expect(fetchedWorkflow.connections.IF.main[1][0].type).toBe('main');
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// Verify true branch (index 0) is empty or undefined
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expect(fetchedWorkflow.connections.IF.main[0] || []).toHaveLength(0);
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});
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// ======================================================================
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// TEST 3: IF node with both branches
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// ======================================================================
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it('should handle both branch="true" and branch="false" simultaneously', async () => {
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// Create minimal workflow with IF node
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const workflowName = createTestWorkflowName('Smart Params - IF Both Branches');
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const workflow = await client.createWorkflow({
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name: workflowName,
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nodes: [
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{
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id: 'manual-1',
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name: 'Manual',
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type: 'n8n-nodes-base.manualTrigger',
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typeVersion: 1,
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position: [250, 300],
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parameters: {}
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},
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{
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id: 'if-1',
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name: 'IF',
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type: 'n8n-nodes-base.if',
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typeVersion: 2,
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position: [450, 300],
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parameters: {
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conditions: {
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conditions: [
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{
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id: 'cond-1',
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leftValue: '={{ $json.value }}',
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rightValue: 'test',
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operation: 'equal'
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}
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]
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}
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}
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}
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],
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connections: {
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Manual: {
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main: [[{ node: 'IF', type: 'main', index: 0 }]]
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}
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},
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tags: ['mcp-integration-test']
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});
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expect(workflow.id).toBeTruthy();
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if (!workflow.id) throw new Error('Workflow ID is missing');
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context.trackWorkflow(workflow.id);
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// Add both handlers and connections in single operation batch
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const result = await handleUpdatePartialWorkflow(
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{
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id: workflow.id,
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operations: [
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{
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type: 'addNode',
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node: {
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name: 'TrueHandler',
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type: 'n8n-nodes-base.set',
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typeVersion: 3.4,
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position: [650, 200],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-1',
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name: 'branch',
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value: 'true',
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type: 'string'
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}
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]
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}
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}
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}
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},
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{
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type: 'addNode',
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node: {
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name: 'FalseHandler',
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type: 'n8n-nodes-base.set',
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typeVersion: 3.4,
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position: [650, 400],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-2',
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name: 'branch',
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value: 'false',
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type: 'string'
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}
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]
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}
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}
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}
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},
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{
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type: 'addConnection',
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source: 'IF',
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target: 'TrueHandler',
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branch: 'true'
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},
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{
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type: 'addConnection',
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source: 'IF',
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target: 'FalseHandler',
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branch: 'false'
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}
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]
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},
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mcpContext
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);
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expect(result.success).toBe(true);
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// Fetch actual workflow from n8n API
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const fetchedWorkflow = await client.getWorkflow(workflow.id);
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// CRITICAL: Assert both branches exist at separate indices
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expect(fetchedWorkflow.connections.IF).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main).toBeDefined();
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// True branch at index 0
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expect(fetchedWorkflow.connections.IF.main[0]).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[0].length).toBe(1);
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expect(fetchedWorkflow.connections.IF.main[0][0].node).toBe('TrueHandler');
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// False branch at index 1
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expect(fetchedWorkflow.connections.IF.main[1]).toBeDefined();
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expect(fetchedWorkflow.connections.IF.main[1].length).toBe(1);
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expect(fetchedWorkflow.connections.IF.main[1][0].node).toBe('FalseHandler');
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});
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});
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// ======================================================================
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// TEST 4-6: Switch node with case parameter
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// ======================================================================
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describe('Switch Node Smart Parameters', () => {
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it('should handle case=0, case=1, case=2 with real n8n API', async () => {
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// Create minimal workflow with Switch node
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const workflowName = createTestWorkflowName('Smart Params - Switch Cases');
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const workflow = await client.createWorkflow({
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name: workflowName,
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nodes: [
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{
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id: 'manual-1',
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name: 'Manual',
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type: 'n8n-nodes-base.manualTrigger',
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typeVersion: 1,
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position: [250, 300],
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parameters: {}
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},
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{
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id: 'switch-1',
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name: 'Switch',
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type: 'n8n-nodes-base.switch',
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typeVersion: 3,
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position: [450, 300],
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parameters: {
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mode: 'rules',
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rules: {
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rules: [
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{
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id: 'rule-1',
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conditions: {
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conditions: [
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{
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id: 'cond-1',
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leftValue: '={{ $json.case }}',
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rightValue: 'a',
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operation: 'equal'
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}
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]
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},
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output: 0
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},
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{
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id: 'rule-2',
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conditions: {
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conditions: [
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{
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id: 'cond-2',
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leftValue: '={{ $json.case }}',
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rightValue: 'b',
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operation: 'equal'
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}
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]
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},
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output: 1
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},
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{
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id: 'rule-3',
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conditions: {
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conditions: [
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{
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id: 'cond-3',
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leftValue: '={{ $json.case }}',
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rightValue: 'c',
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operation: 'equal'
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}
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]
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},
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output: 2
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}
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]
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}
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}
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}
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],
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connections: {
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Manual: {
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main: [[{ node: 'Switch', type: 'main', index: 0 }]]
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}
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},
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tags: ['mcp-integration-test']
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});
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expect(workflow.id).toBeTruthy();
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if (!workflow.id) throw new Error('Workflow ID is missing');
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context.trackWorkflow(workflow.id);
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// Add 3 handler nodes and connections using case smart parameter
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const result = await handleUpdatePartialWorkflow(
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{
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id: workflow.id,
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operations: [
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// Add handlers
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{
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type: 'addNode',
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node: {
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name: 'Handler0',
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type: 'n8n-nodes-base.set',
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typeVersion: 3.4,
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position: [650, 100],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-1',
|
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name: 'case',
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value: '0',
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type: 'string'
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}
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]
|
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}
|
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}
|
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}
|
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},
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{
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type: 'addNode',
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node: {
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name: 'Handler1',
|
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type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
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position: [650, 300],
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parameters: {
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assignments: {
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assignments: [
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{
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id: 'assign-2',
|
|
name: 'case',
|
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value: '1',
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type: 'string'
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}
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]
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}
|
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}
|
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}
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},
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{
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type: 'addNode',
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|
node: {
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name: 'Handler2',
|
|
type: 'n8n-nodes-base.set',
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|
typeVersion: 3.4,
|
|
position: [650, 500],
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|
parameters: {
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|
assignments: {
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|
assignments: [
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|
{
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|
id: 'assign-3',
|
|
name: 'case',
|
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value: '2',
|
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type: 'string'
|
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}
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]
|
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}
|
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}
|
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}
|
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},
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// Add connections with case parameter
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{
|
|
type: 'addConnection',
|
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source: 'Switch',
|
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target: 'Handler0',
|
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case: 0 // Smart parameter
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},
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{
|
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type: 'addConnection',
|
|
source: 'Switch',
|
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target: 'Handler1',
|
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case: 1 // Smart parameter
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},
|
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{
|
|
type: 'addConnection',
|
|
source: 'Switch',
|
|
target: 'Handler2',
|
|
case: 2 // Smart parameter
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// CRITICAL: Assert connections at correct indices
|
|
expect(fetchedWorkflow.connections.Switch).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main).toBeDefined();
|
|
|
|
// Case 0 at index 0
|
|
expect(fetchedWorkflow.connections.Switch.main[0]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[0].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[0][0].node).toBe('Handler0');
|
|
|
|
// Case 1 at index 1
|
|
expect(fetchedWorkflow.connections.Switch.main[1]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[1].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[1][0].node).toBe('Handler1');
|
|
|
|
// Case 2 at index 2
|
|
expect(fetchedWorkflow.connections.Switch.main[2]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[2].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[2][0].node).toBe('Handler2');
|
|
});
|
|
});
|
|
|
|
// ======================================================================
|
|
// TEST 5: rewireConnection with branch parameter
|
|
// ======================================================================
|
|
|
|
describe('RewireConnection with Smart Parameters', () => {
|
|
it('should rewire connection using branch="true" parameter', async () => {
|
|
// Create workflow with IF node and initial connection
|
|
const workflowName = createTestWorkflowName('Smart Params - Rewire IF True');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'if-1',
|
|
name: 'IF',
|
|
type: 'n8n-nodes-base.if',
|
|
typeVersion: 2,
|
|
position: [450, 300],
|
|
parameters: {
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-1',
|
|
leftValue: '={{ $json.value }}',
|
|
rightValue: 'test',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
},
|
|
{
|
|
id: 'handler1',
|
|
name: 'Handler1',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 200],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-1',
|
|
name: 'handler',
|
|
value: '1',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
},
|
|
{
|
|
id: 'handler2',
|
|
name: 'Handler2',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 400],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-2',
|
|
name: 'handler',
|
|
value: '2',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'IF', type: 'main', index: 0 }]]
|
|
},
|
|
IF: {
|
|
// Initial connection: true branch to Handler1
|
|
main: [[{ node: 'Handler1', type: 'main', index: 0 }], []]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Rewire true branch from Handler1 to Handler2
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'rewireConnection',
|
|
source: 'IF',
|
|
from: 'Handler1',
|
|
to: 'Handler2',
|
|
branch: 'true' // Smart parameter
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// CRITICAL: Assert connection rewired at index 0 (true branch)
|
|
expect(fetchedWorkflow.connections.IF).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main[0]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main[0].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.IF.main[0][0].node).toBe('Handler2');
|
|
});
|
|
|
|
// ======================================================================
|
|
// TEST 6: rewireConnection with case parameter
|
|
// ======================================================================
|
|
|
|
it('should rewire connection using case=1 parameter', async () => {
|
|
// Create workflow with Switch node and initial connections
|
|
const workflowName = createTestWorkflowName('Smart Params - Rewire Switch Case');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'switch-1',
|
|
name: 'Switch',
|
|
type: 'n8n-nodes-base.switch',
|
|
typeVersion: 3,
|
|
position: [450, 300],
|
|
parameters: {
|
|
mode: 'rules',
|
|
rules: {
|
|
rules: [
|
|
{
|
|
id: 'rule-1',
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-1',
|
|
leftValue: '={{ $json.case }}',
|
|
rightValue: 'a',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
},
|
|
output: 0
|
|
},
|
|
{
|
|
id: 'rule-2',
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-2',
|
|
leftValue: '={{ $json.case }}',
|
|
rightValue: 'b',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
},
|
|
output: 1
|
|
}
|
|
]
|
|
}
|
|
}
|
|
},
|
|
{
|
|
id: 'handler1',
|
|
name: 'OldHandler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 300],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-1',
|
|
name: 'handler',
|
|
value: 'old',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
},
|
|
{
|
|
id: 'handler2',
|
|
name: 'NewHandler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 500],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-2',
|
|
name: 'handler',
|
|
value: 'new',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'Switch', type: 'main', index: 0 }]]
|
|
},
|
|
Switch: {
|
|
// Initial connection: case 1 to OldHandler
|
|
main: [[], [{ node: 'OldHandler', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Rewire case 1 from OldHandler to NewHandler
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'rewireConnection',
|
|
source: 'Switch',
|
|
from: 'OldHandler',
|
|
to: 'NewHandler',
|
|
case: 1 // Smart parameter
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// CRITICAL: Assert connection rewired at index 1 (case 1)
|
|
expect(fetchedWorkflow.connections.Switch).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[1]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[1].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[1][0].node).toBe('NewHandler');
|
|
});
|
|
});
|
|
|
|
// ======================================================================
|
|
// TEST 7: Explicit sourceIndex overrides branch
|
|
// ======================================================================
|
|
|
|
describe('Parameter Priority', () => {
|
|
it('should prioritize explicit sourceIndex over branch parameter', async () => {
|
|
// Create minimal workflow with IF node
|
|
const workflowName = createTestWorkflowName('Smart Params - Explicit Override Branch');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'if-1',
|
|
name: 'IF',
|
|
type: 'n8n-nodes-base.if',
|
|
typeVersion: 2,
|
|
position: [450, 300],
|
|
parameters: {
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-1',
|
|
leftValue: '={{ $json.value }}',
|
|
rightValue: 'test',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'IF', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Add connection with BOTH branch='true' (would be index 0) and explicit sourceIndex=1
|
|
// Explicit sourceIndex should win
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'addNode',
|
|
node: {
|
|
name: 'Handler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 400],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-1',
|
|
name: 'test',
|
|
value: 'value',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
type: 'addConnection',
|
|
source: 'IF',
|
|
target: 'Handler',
|
|
branch: 'true', // Would map to index 0
|
|
sourceIndex: 1 // Explicit index should override
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// CRITICAL: Assert connection is at index 1 (explicit wins)
|
|
expect(fetchedWorkflow.connections.IF).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main[1]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.IF.main[1].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.IF.main[1][0].node).toBe('Handler');
|
|
|
|
// Index 0 should be empty
|
|
expect(fetchedWorkflow.connections.IF.main[0] || []).toHaveLength(0);
|
|
});
|
|
|
|
// ======================================================================
|
|
// TEST 8: Explicit sourceIndex overrides case
|
|
// ======================================================================
|
|
|
|
it('should prioritize explicit sourceIndex over case parameter', async () => {
|
|
// Create minimal workflow with Switch node
|
|
const workflowName = createTestWorkflowName('Smart Params - Explicit Override Case');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'switch-1',
|
|
name: 'Switch',
|
|
type: 'n8n-nodes-base.switch',
|
|
typeVersion: 3,
|
|
position: [450, 300],
|
|
parameters: {
|
|
mode: 'rules',
|
|
rules: {
|
|
rules: [
|
|
{
|
|
id: 'rule-1',
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-1',
|
|
leftValue: '={{ $json.case }}',
|
|
rightValue: 'a',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
},
|
|
output: 0
|
|
},
|
|
{
|
|
id: 'rule-2',
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-2',
|
|
leftValue: '={{ $json.case }}',
|
|
rightValue: 'b',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
},
|
|
output: 1
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'Switch', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Add connection with BOTH case=1 (would be index 1) and explicit sourceIndex=2
|
|
// Explicit sourceIndex should win
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'addNode',
|
|
node: {
|
|
name: 'Handler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 500],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: [
|
|
{
|
|
id: 'assign-1',
|
|
name: 'test',
|
|
value: 'value',
|
|
type: 'string'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
type: 'addConnection',
|
|
source: 'Switch',
|
|
target: 'Handler',
|
|
case: 1, // Would map to index 1
|
|
sourceIndex: 2 // Explicit index should override
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// CRITICAL: Assert connection is at index 2 (explicit wins)
|
|
expect(fetchedWorkflow.connections.Switch).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[2]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[2].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[2][0].node).toBe('Handler');
|
|
|
|
// Index 1 should be empty
|
|
expect(fetchedWorkflow.connections.Switch.main[1] || []).toHaveLength(0);
|
|
});
|
|
});
|
|
|
|
// ======================================================================
|
|
// ERROR CASES: Invalid smart parameter values
|
|
// ======================================================================
|
|
|
|
describe('Error Cases', () => {
|
|
it('should reject invalid branch value', async () => {
|
|
// Create minimal workflow with IF node
|
|
const workflowName = createTestWorkflowName('Smart Params - Invalid Branch');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'if-1',
|
|
name: 'IF',
|
|
type: 'n8n-nodes-base.if',
|
|
typeVersion: 2,
|
|
position: [450, 300],
|
|
parameters: {
|
|
conditions: {
|
|
conditions: [
|
|
{
|
|
id: 'cond-1',
|
|
leftValue: '={{ $json.value }}',
|
|
rightValue: 'test',
|
|
operation: 'equal'
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'IF', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Try to add connection with invalid branch value
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'addNode',
|
|
node: {
|
|
name: 'Handler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 300],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: []
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
type: 'addConnection',
|
|
source: 'IF',
|
|
target: 'Handler',
|
|
branch: 'invalid' as any // Invalid value
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
// Should fail validation
|
|
expect(result.success).toBe(false);
|
|
expect(result.error).toBeDefined();
|
|
});
|
|
|
|
it('should handle negative case value gracefully', async () => {
|
|
// NOTE: Currently negative case values are accepted and mapped to sourceIndex=-1
|
|
// which n8n API accepts (though it may not behave correctly at runtime).
|
|
// TODO: Add validation to reject negative case values in future enhancement.
|
|
|
|
// Create minimal workflow with Switch node
|
|
const workflowName = createTestWorkflowName('Smart Params - Negative Case');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'switch-1',
|
|
name: 'Switch',
|
|
type: 'n8n-nodes-base.switch',
|
|
typeVersion: 3,
|
|
position: [450, 300],
|
|
parameters: {
|
|
mode: 'rules',
|
|
rules: {
|
|
rules: []
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'Switch', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Add connection with negative case value
|
|
// Currently accepted but should be validated in future
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'addNode',
|
|
node: {
|
|
name: 'Handler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 300],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: []
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
type: 'addConnection',
|
|
source: 'Switch',
|
|
target: 'Handler',
|
|
case: -1 // Negative value - should be validated but currently accepted
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
// Currently succeeds (validation gap)
|
|
// TODO: Should fail validation when enhanced validation is added
|
|
expect(result.success).toBe(true);
|
|
});
|
|
});
|
|
|
|
// ======================================================================
|
|
// EDGE CASES: Branch parameter on non-IF node
|
|
// ======================================================================
|
|
|
|
describe('Edge Cases', () => {
|
|
it('should ignore branch parameter on non-IF node (fallback to default)', async () => {
|
|
// Create workflow with Set node (not an IF node)
|
|
const workflowName = createTestWorkflowName('Smart Params - Branch on Non-IF');
|
|
const workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: 'manual-1',
|
|
name: 'Manual',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [250, 300],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: 'set-1',
|
|
name: 'Set',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [450, 300],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: []
|
|
}
|
|
}
|
|
}
|
|
],
|
|
connections: {
|
|
Manual: {
|
|
main: [[{ node: 'Set', type: 'main', index: 0 }]]
|
|
}
|
|
},
|
|
tags: ['mcp-integration-test']
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Add connection with branch parameter on non-IF node
|
|
// Should be ignored and use default index 0
|
|
const result = await handleUpdatePartialWorkflow(
|
|
{
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'addNode',
|
|
node: {
|
|
name: 'Handler',
|
|
type: 'n8n-nodes-base.set',
|
|
typeVersion: 3.4,
|
|
position: [650, 300],
|
|
parameters: {
|
|
assignments: {
|
|
assignments: []
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{
|
|
type: 'addConnection',
|
|
source: 'Set',
|
|
target: 'Handler',
|
|
branch: 'true' // Should be ignored on non-IF node
|
|
}
|
|
]
|
|
},
|
|
mcpContext
|
|
);
|
|
|
|
expect(result.success).toBe(true);
|
|
|
|
// Fetch actual workflow from n8n API
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// Connection should be at default index 0 (branch parameter ignored)
|
|
expect(fetchedWorkflow.connections.Set).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Set.main).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Set.main[0]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Set.main[0].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Set.main[0][0].node).toBe('Handler');
|
|
});
|
|
});
|
|
|
|
// ======================================================================
|
|
// TEST 11: Array Index Preservation (Issue #272 - Critical Bug Fix)
|
|
// ======================================================================
|
|
describe('Array Index Preservation for Multi-Output Nodes', () => {
|
|
it('should preserve array indices when rewiring Switch node connections', async () => {
|
|
// This test verifies the fix for the critical bug where filtering empty arrays
|
|
// caused index shifting in multi-output nodes (Switch, IF with multiple handlers)
|
|
//
|
|
// Bug: workflow.connections[node][output].filter(conns => conns.length > 0)
|
|
// Fix: Only remove trailing empty arrays, preserve intermediate ones
|
|
|
|
const workflowName = createTestWorkflowName('Array Index Preservation - Switch');
|
|
|
|
// Create workflow with Switch node connected to 4 handlers
|
|
const workflow: Workflow = await client.createWorkflow({
|
|
name: workflowName,
|
|
nodes: [
|
|
{
|
|
id: '1',
|
|
name: 'Start',
|
|
type: 'n8n-nodes-base.manualTrigger',
|
|
typeVersion: 1,
|
|
position: [0, 0],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: '2',
|
|
name: 'Switch',
|
|
type: 'n8n-nodes-base.switch',
|
|
typeVersion: 3,
|
|
position: [200, 0],
|
|
parameters: {
|
|
options: {},
|
|
rules: {
|
|
rules: [
|
|
{ conditions: { conditions: [{ leftValue: '={{$json.value}}', rightValue: '1', operator: { type: 'string', operation: 'equals' } }] } },
|
|
{ conditions: { conditions: [{ leftValue: '={{$json.value}}', rightValue: '2', operator: { type: 'string', operation: 'equals' } }] } },
|
|
{ conditions: { conditions: [{ leftValue: '={{$json.value}}', rightValue: '3', operator: { type: 'string', operation: 'equals' } }] } }
|
|
]
|
|
}
|
|
}
|
|
},
|
|
{
|
|
id: '3',
|
|
name: 'Handler0',
|
|
type: 'n8n-nodes-base.noOp',
|
|
typeVersion: 1,
|
|
position: [400, -100],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: '4',
|
|
name: 'Handler1',
|
|
type: 'n8n-nodes-base.noOp',
|
|
typeVersion: 1,
|
|
position: [400, 0],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: '5',
|
|
name: 'Handler2',
|
|
type: 'n8n-nodes-base.noOp',
|
|
typeVersion: 1,
|
|
position: [400, 100],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: '6',
|
|
name: 'Handler3',
|
|
type: 'n8n-nodes-base.noOp',
|
|
typeVersion: 1,
|
|
position: [400, 200],
|
|
parameters: {}
|
|
},
|
|
{
|
|
id: '7',
|
|
name: 'NewHandler1',
|
|
type: 'n8n-nodes-base.noOp',
|
|
typeVersion: 1,
|
|
position: [400, 50],
|
|
parameters: {}
|
|
}
|
|
],
|
|
connections: {
|
|
Start: {
|
|
main: [[{ node: 'Switch', type: 'main', index: 0 }]]
|
|
},
|
|
Switch: {
|
|
main: [
|
|
[{ node: 'Handler0', type: 'main', index: 0 }], // case 0
|
|
[{ node: 'Handler1', type: 'main', index: 0 }], // case 1
|
|
[{ node: 'Handler2', type: 'main', index: 0 }], // case 2
|
|
[{ node: 'Handler3', type: 'main', index: 0 }] // case 3 (fallback)
|
|
]
|
|
}
|
|
}
|
|
});
|
|
|
|
expect(workflow.id).toBeTruthy();
|
|
if (!workflow.id) throw new Error('Workflow ID is missing');
|
|
context.trackWorkflow(workflow.id);
|
|
|
|
// Rewire case 1 from Handler1 to NewHandler1
|
|
// CRITICAL: This should NOT shift indices of case 2 and case 3
|
|
await handleUpdatePartialWorkflow({
|
|
id: workflow.id,
|
|
operations: [
|
|
{
|
|
type: 'rewireConnection',
|
|
source: 'Switch',
|
|
from: 'Handler1',
|
|
to: 'NewHandler1',
|
|
case: 1
|
|
}
|
|
]
|
|
});
|
|
|
|
const fetchedWorkflow = await client.getWorkflow(workflow.id);
|
|
|
|
// Verify all indices are preserved correctly
|
|
expect(fetchedWorkflow.connections.Switch).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main).toBeDefined();
|
|
|
|
// case 0: Should still be Handler0
|
|
expect(fetchedWorkflow.connections.Switch.main[0]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[0].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[0][0].node).toBe('Handler0');
|
|
|
|
// case 1: Should now be NewHandler1 (rewired)
|
|
expect(fetchedWorkflow.connections.Switch.main[1]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[1].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[1][0].node).toBe('NewHandler1');
|
|
|
|
// case 2: Should STILL be Handler2 (index NOT shifted!)
|
|
expect(fetchedWorkflow.connections.Switch.main[2]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[2].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[2][0].node).toBe('Handler2');
|
|
|
|
// case 3: Should STILL be Handler3 (index NOT shifted!)
|
|
expect(fetchedWorkflow.connections.Switch.main[3]).toBeDefined();
|
|
expect(fetchedWorkflow.connections.Switch.main[3].length).toBe(1);
|
|
expect(fetchedWorkflow.connections.Switch.main[3][0].node).toBe('Handler3');
|
|
});
|
|
});
|
|
});
|