test: get free port to avoid net collisions

package.json

@@ -114,6 +114,7 @@
     "esbuild-plugin-transform-hook": "^0.1.1",
     "esbuild-plugin-utils": "^0.1.0",
     "fs-extra": "^11.2.0",
+    "get-port": "^7.1.0",
     "globby": "^14.0.2",
     "jsr": "^0.13.2",
     "madge": "^8.0.0",

test/cli.test.js

@@ -15,6 +15,7 @@
 import assert from 'node:assert'
 import { test, describe, before, after } from 'node:test'
 import { fileURLToPath } from 'node:url'
+import getPort from 'get-port'
 import '../build/globals.js'
 import { isMain, normalizeExt } from '../build/cli.js'
 
@@ -124,17 +125,19 @@ describe('cli', () => {
   })
 
   test('scripts from https', async () => {
-    const server = $`cat ${path.resolve('test/fixtures/echo.http')} | nc -l 8080`
+    const port = await getPort()
+    const server = $`cat ${path.resolve('test/fixtures/echo.http')} | nc -l ${port}`
     const out =
-      await $`sleep 10 && node build/cli.js --verbose http://127.0.0.1:8080/echo.mjs`
+      await $`sleep 10 && node build/cli.js --verbose http://127.0.0.1:${port}/echo.mjs`
     assert.match(out.stderr, /test/)
     await server.kill()
   })
 
   test('scripts from https not ok', async () => {
-    const server = $`echo $'HTTP/1.1 500\n\n' | nc -l 8081`
+    const port = await getPort()
+    const server = $`echo $'HTTP/1.1 500\n\n' | nc -l ${port}`
     const out =
-      await $`sleep 10 && node build/cli.js http://127.0.0.1:8081`.nothrow()
+      await $`sleep 10 && node build/cli.js http://127.0.0.1:${port}`.nothrow()
     assert.match(out.stderr, /Error: Can't get/)
     await server.kill()
   })