test: add mustCall in test-fs-readfilesync-pipe-large.js

PR-URL: #27458
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Yorkie Liu <yorkiefixer@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

Author: sinoon

test/parallel/test-fs-readfilesync-pipe-large.js

@@ -26,12 +26,16 @@ const exec = require('child_process').exec;
 constf=JSON.stringify(__filename);
 constnode=JSON.stringify(process.execPath);
 constcmd=`cat ${filename} | ${node}${f} child`;
-exec(cmd,{maxBuffer: 1000000},function(err,stdout,stderr){
-assert.ifError(err);
-assert.strictEqual(stdout,dataExpected);
-assert.strictEqual(stderr,'');
-console.log('ok');
-});
+exec(
+cmd,
+{maxBuffer: 1000000},
+common.mustCall(function(err,stdout,stderr){
+assert.ifError(err);
+assert.strictEqual(stdout,dataExpected);
+assert.strictEqual(stderr,'');
+console.log('ok');
+})
+);
 
 process.on('exit',function(){
 fs.unlinkSync(filename);