runner: use spawnSync timeout instead of own system

Author: CanadaHonk

runner/index.js

@@ -61,31 +61,15 @@ if (cluster.isPrimary) {
 
     const worker = cluster.fork();
 
-    let timeout;
     let running;
     const enqueue = () => {
-      if (timeout) clearTimeout(timeout);
       running = tests[queue++];
       if (!running) {
         worker.kill();
         return;
       }
 
       worker.send(running);
-      timeout = setTimeout(() => {
-        worker.kill();
-        result(running.file, false);
-
-        // cleanup tmp file
-        const tmpFile = `test262/test/${running.file}.${engine}`;
-        fs.unlinkSync(tmpFile);
-
-        if (finished === total) {
-          resolve();
-        } else {
-          spawn();
-        }
-      }, 10000);
     };
 
     worker.on('message', pass => {

util.js

@@ -16,7 +16,8 @@ export const $$ = (cmd, args, env = {}) => {
       ...process.env,
       NO_COLOR: 1,
       ...env
-    }
+    },
+    timeout: 10000
   });
 
   return {