test: add port validation tests for internal docker URLs

tests/unit/server.test.ts

@@ -209,6 +209,20 @@ describe('WebhookServer', () => {
     expect(mockAdd).not.toHaveBeenCalled();
   });
 
+  test('should handle requests on configured port', async () => {
+    const originalPort = process.env.PORT;
+    process.env.PORT = '3007';
+    
+    try {
+      const server = await WebhookServer.start();
+      const response = await fetch('http://localhost:3007/health');
+      expect(response.status).toBe(200);
+      server.stop();
+    } finally {
+      process.env.PORT = originalPort;
+    }
+  });
+
   test('should handle XSS/SQL injection attempts', async () => {
     const maliciousMessage = `/tarea nueva <script>alert('xss')</script>'; DROP TABLE tasks; --`;
     const payload = {

tests/unit/services/webhook-manager.test.ts

@@ -18,6 +18,28 @@ describe('WebhookManager', () => {
     process.env = envBackup;
   });
 
+  test('should warn about missing port in internal URLs', () => {
+    process.env.WEBHOOK_URL = 'http://srv-captain--taskbot/webhook';
+    const consoleSpy = mock(() => {});
+    console.warn = consoleSpy;
+    
+    WebhookManager['validateConfig']();
+    
+    expect(consoleSpy).toHaveBeenCalledWith(
+      expect.stringContaining('missing port number')
+    );
+  });
+
+  test('should accept internal URLs with ports', () => {
+    process.env.WEBHOOK_URL = 'http://srv-captain--taskbot:3007/webhook';
+    const consoleSpy = mock(() => {});
+    console.warn = consoleSpy;
+    
+    WebhookManager['validateConfig']();
+    
+    expect(consoleSpy).not.toHaveBeenCalled();
+  });
+
   test('should create correct config structure', () => {
     const config = WebhookManager['getConfig']();
     expect(config).toEqual({