test: add test for child_process benchmark

PR-URL: #12326 Ref: #12068 Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Alexey Orlenko <[email protected]>

Author: joyeecheung

benchmark/child_process/spawn-echo.js

@@ -1,15 +1,15 @@
 'use strict';
 varcommon=require('../common.js');
 varbench=common.createBenchmark(main,{
-thousands: [1]
+n: [1000]
 });
 
 varspawn=require('child_process').spawn;
 functionmain(conf){
-varlen=+conf.thousands*1000;
+varn=+conf.n;
 
 bench.start();
-go(len,len);
+go(n,n);
 }
 
 functiongo(n,left){

test/sequential/test-benchmark-child-process.js

@@ -0,0 +1,19 @@
+'use strict';
+
+require('../common');
+
+constassert=require('assert');
+constfork=require('child_process').fork;
+constpath=require('path');
+
+construnjs=path.join(__dirname,'..','..','benchmark','run.js');
+
+constchild=fork(runjs,['--set','dur=0.1',
+'--set','n=1',
+'--set','len=1',
+'child_process'],
+{env: {NODEJS_BENCHMARK_ZERO_ALLOWED: 1}});
+child.on('exit',(code,signal)=>{
+assert.strictEqual(code,0);
+assert.strictEqual(signal,null);
+});