Initial commit of n8n MCP Server

A Model Context Protocol (MCP) server that integrates with n8n, providing tools for workflow and execution management via the n8n API.

tests/unit/tools/workflow/simple-tool.test.ts

@@ -0,0 +1,90 @@
+/**
+ * Simple workflow tool tests without complex dependencies
+ */
+
+import { describe, it, expect } from '@jest/globals';
+
+// Mock workflow data
+const mockWorkflows = [
+  {
+    id: '1234abc',
+    name: 'Test Workflow 1',
+    active: true,
+    createdAt: '2025-03-01T12:00:00.000Z',
+    updatedAt: '2025-03-02T14:30:00.000Z',
+    nodes: []
+  },
+  {
+    id: '5678def',
+    name: 'Test Workflow 2',
+    active: false,
+    createdAt: '2025-03-01T12:00:00.000Z',
+    updatedAt: '2025-03-12T10:15:00.000Z',
+    nodes: []
+  }
+];
+
+// Simple function to test tool definition
+function getListWorkflowsToolDefinition() {
+  return {
+    name: 'list_workflows',
+    description: 'List all workflows with optional filtering by status',
+    inputSchema: {
+      type: 'object',
+      properties: {
+        active: {
+          type: 'boolean',
+          description: 'Filter workflows by active status'
+        }
+      },
+      required: []
+    }
+  };
+}
+
+// Simple function to test workflow filtering
+function filterWorkflows(workflows, filter) {
+  if (filter && typeof filter.active === 'boolean') {
+    return workflows.filter(workflow => workflow.active === filter.active);
+  }
+  return workflows;
+}
+
+describe('Workflow Tools', () => {
+  describe('getListWorkflowsToolDefinition', () => {
+    it('should return the correct tool definition', () => {
+      const definition = getListWorkflowsToolDefinition();
+      
+      expect(definition.name).toBe('list_workflows');
+      expect(definition.description).toBeTruthy();
+      expect(definition.inputSchema).toBeDefined();
+      expect(definition.inputSchema.properties).toHaveProperty('active');
+      expect(definition.inputSchema.required).toEqual([]);
+    });
+  });
+  
+  describe('filterWorkflows', () => {
+    it('should return all workflows when no filter is provided', () => {
+      const result = filterWorkflows(mockWorkflows, {});
+      
+      expect(result).toHaveLength(2);
+      expect(result).toEqual(mockWorkflows);
+    });
+    
+    it('should filter workflows by active status when active is true', () => {
+      const result = filterWorkflows(mockWorkflows, { active: true });
+      
+      expect(result).toHaveLength(1);
+      expect(result[0].id).toBe('1234abc');
+      expect(result[0].active).toBe(true);
+    });
+    
+    it('should filter workflows by active status when active is false', () => {
+      const result = filterWorkflows(mockWorkflows, { active: false });
+      
+      expect(result).toHaveLength(1);
+      expect(result[0].id).toBe('5678def');
+      expect(result[0].active).toBe(false);
+    });
+  });
+});