fix: don't fail on missing express

scripts/cannonPost.bench.script.ts

@@ -6,17 +6,16 @@ yarn tsn cannonPost.bench
 
 import http from 'node:http'
 import { runScript } from '@naturalcycles/nodejs-lib'
-import express = require('express')
 import { runCannon } from '../src'
 
 runScript(async () => {
   await runCannon(
     {
       '01-post': async () => {
-        const app = express()
+        const app = require('express')()
         app.disable('etag')
         app.disable('x-powered-by')
-        app.post('/hello', (req, res) => res.json({ ok: true }))
+        app.post('/hello', (req: any, res: any) => res.json({ ok: true }))
         return http.createServer(app)
       },
     },

src/cannon.profiles.ts

@@ -1,6 +1,4 @@
 import http from 'node:http'
-import express from 'express'
-import helmet from 'helmet'
 import { HttpServerFactory } from './cannon.model'
 
 export const bareNodeServerFactory: HttpServerFactory = async () => {
@@ -11,18 +9,19 @@ export const bareNodeServerFactory: HttpServerFactory = async () => {
 }
 
 export const bareExpressServerFactory: HttpServerFactory = async () => {
-  const app = express()
+  const app = require('express')()
   app.disable('etag')
   app.disable('x-powered-by')
-  app.get('/', (req, res) => res.json({ hello: 'world' }))
+  app.get('/', (req: any, res: any) => res.json({ hello: 'world' }))
   return http.createServer(app)
 }
 
 /**
  * Based on: https://github.com/fastify/benchmarks/blob/master/benchmarks/express-with-middlewares.js
  */
 export const expressWithMiddlewaresServerFactory: HttpServerFactory = async () => {
-  const app = express()
+  const app = require('express')()
+  const helmet = require('helmet')
   app.disable('etag')
   app.disable('x-powered-by')
 
@@ -34,7 +33,7 @@ export const expressWithMiddlewaresServerFactory: HttpServerFactory = async () =
   app.use(helmet.ieNoOpen())
   app.use(helmet.xssFilter())
 
-  app.get('/', (req, res) => res.json({ hello: 'world' }))
+  app.get('/', (req: any, res: any) => res.json({ hello: 'world' }))
 
   return http.createServer(app)
 }
@@ -44,20 +43,20 @@ export const expressWithMiddlewaresServerFactory: HttpServerFactory = async () =
  */
 export function expressFunctionFactory(fn: () => any): HttpServerFactory {
   return async () => {
-    const app = express()
+    const app = require('express')()
     app.disable('etag')
     app.disable('x-powered-by')
-    app.get('/', async (req, res) => res.json(await fn()))
+    app.get('/', async (req: any, res: any) => res.json(await fn()))
     return http.createServer(app)
   }
 }
 
 export function expressSyncFunctionFactory(fn: () => any): HttpServerFactory {
   return async () => {
-    const app = express()
+    const app = require('express')()
     app.disable('etag')
     app.disable('x-powered-by')
-    app.get('/', (req, res) => res.json(fn()))
+    app.get('/', (req: any, res: any) => res.json(fn()))
     return http.createServer(app)
   }
 }