test: add child_process.exec() timeout coverage

This commit adds coverage for the timeout option used by child_process exec() and execFile(). PR-URL: #9208 Reviewed-By: Santiago Gimeno <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michaël Zasso <[email protected]>

Author: cjihrig

test/parallel/test-child-process-exec-timeout.js

@@ -0,0 +1,45 @@
+'use strict';
+constcommon=require('../common');
+constassert=require('assert');
+constcp=require('child_process');
+
+if(process.argv[2]==='child'){
+setTimeout(()=>{
+// The following console statements are part of the test.
+console.log('child stdout');
+console.error('child stderr');
+},common.platformTimeout(1000));
+return;
+}
+
+constcmd=`${process.execPath}${__filename} child`;
+
+// Test the case where a timeout is set, and it expires.
+cp.exec(cmd,{timeout: 1},common.mustCall((err,stdout,stderr)=>{
+assert.strictEqual(err.killed,true);
+assert.strictEqual(err.code,null);
+assert.strictEqual(err.signal,'SIGTERM');
+assert.strictEqual(err.cmd,cmd);
+assert.strictEqual(stdout.trim(),'');
+assert.strictEqual(stderr.trim(),'');
+}));
+
+// Test with a different kill signal.
+cp.exec(cmd,{
+timeout: 1,
+killSignal: 'SIGKILL'
+},common.mustCall((err,stdout,stderr)=>{
+assert.strictEqual(err.killed,true);
+assert.strictEqual(err.code,null);
+assert.strictEqual(err.signal,'SIGKILL');
+assert.strictEqual(err.cmd,cmd);
+assert.strictEqual(stdout.trim(),'');
+assert.strictEqual(stderr.trim(),'');
+}));
+
+// Test the case where a timeout is set, but not expired.
+cp.exec(cmd,{timeout: 2**30},common.mustCall((err,stdout,stderr)=>{
+assert.ifError(err);
+assert.strictEqual(stdout.trim(),'child stdout');
+assert.strictEqual(stderr.trim(),'child stderr');
+}));