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/config/simple-environment.test.ts

@@ -0,0 +1,97 @@
+/**
+ * Simple environment configuration tests
+ */
+
+import { describe, it, expect } from '@jest/globals';
+
+// Simple environment validation function to test
+function validateEnvironment(env: Record<string, string | undefined>): { 
+  n8nApiUrl: string;
+  n8nApiKey: string;
+  debug: boolean;
+} {
+  // Check required variables
+  if (!env.N8N_API_URL) {
+    throw new Error('Missing required environment variable: N8N_API_URL');
+  }
+  
+  if (!env.N8N_API_KEY) {
+    throw new Error('Missing required environment variable: N8N_API_KEY');
+  }
+  
+  // Validate URL format
+  try {
+    new URL(env.N8N_API_URL);
+  } catch (error) {
+    throw new Error(`Invalid URL format for N8N_API_URL: ${env.N8N_API_URL}`);
+  }
+  
+  // Return parsed config
+  return {
+    n8nApiUrl: env.N8N_API_URL,
+    n8nApiKey: env.N8N_API_KEY,
+    debug: env.DEBUG?.toLowerCase() === 'true'
+  };
+}
+
+describe('Environment Configuration', () => {
+  describe('validateEnvironment', () => {
+    it('should return a valid config when all required variables are present', () => {
+      const env = {
+        N8N_API_URL: 'https://n8n.example.com/api/v1',
+        N8N_API_KEY: 'test-api-key'
+      };
+      
+      const config = validateEnvironment(env);
+      
+      expect(config).toEqual({
+        n8nApiUrl: 'https://n8n.example.com/api/v1',
+        n8nApiKey: 'test-api-key',
+        debug: false
+      });
+    });
+    
+    it('should set debug to true when DEBUG=true', () => {
+      const env = {
+        N8N_API_URL: 'https://n8n.example.com/api/v1',
+        N8N_API_KEY: 'test-api-key',
+        DEBUG: 'true'
+      };
+      
+      const config = validateEnvironment(env);
+      
+      expect(config.debug).toBe(true);
+    });
+    
+    it('should throw an error when N8N_API_URL is missing', () => {
+      const env = {
+        N8N_API_KEY: 'test-api-key'
+      };
+      
+      expect(() => validateEnvironment(env)).toThrow(
+        'Missing required environment variable: N8N_API_URL'
+      );
+    });
+    
+    it('should throw an error when N8N_API_KEY is missing', () => {
+      const env = {
+        N8N_API_URL: 'https://n8n.example.com/api/v1'
+      };
+      
+      expect(() => validateEnvironment(env)).toThrow(
+        'Missing required environment variable: N8N_API_KEY'
+      );
+    });
+    
+    it('should throw an error when N8N_API_URL is not a valid URL', () => {
+      const env = {
+        N8N_API_URL: 'invalid-url',
+        N8N_API_KEY: 'test-api-key'
+      };
+      
+      expect(() => validateEnvironment(env)).toThrow(
+        'Invalid URL format for N8N_API_URL: invalid-url'
+      );
+    });
+  });
+});