test: refactor test-signal-unregister

* var -> const * assert.equal() -> assert.strictEqual() PR-URL: #9920 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Prince John Wesley <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: mark hughes

test/parallel/test-signal-unregister.js

@@ -1,13 +1,13 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
-varspawn=require('child_process').spawn;
+constcommon=require('../common');
+constassert=require('assert');
+constspawn=require('child_process').spawn;
 
-varchild=spawn(process.argv[0],[common.fixturesDir+'/should_exit.js']);
+constchild=spawn(process.argv[0],[common.fixturesDir+'/should_exit.js']);
 child.stdout.once('data',function(){
 child.kill('SIGINT');
 });
 child.on('exit',common.mustCall(function(exitCode,signalCode){
-assert.equal(exitCode,null);
-assert.equal(signalCode,'SIGINT');
+assert.strictEqual(exitCode,null);
+assert.strictEqual(signalCode,'SIGINT');
 }));