test: refactor test-http-exit-delay

test/parallel/test-http-exit-delay.js

@@ -1,41 +1,30 @@
 'use strict';
-var assert = require('assert');
-var common = require('../common');
-var http = require('http');
+const assert = require('assert');
+const common = require('../common');
+const http = require('http');
 
 var start;
-var server = http.createServer(function(req, res) {
+const server = http.createServer(common.mustCall(function(req, res) {
   req.resume();
   req.on('end', function() {
     res.end('Success');
   });
 
   server.close();
-});
-
-server.listen(common.PORT, 'localhost', function() {
-  var interval_id = setInterval(function() {
-    start = new Date();
-    if (start.getMilliseconds() > 100)
-      return;
-
-    console.log(start.toISOString());
-    var req = http.request({
-      'host': 'localhost',
-      'port': common.PORT,
-      'agent': false,
-      'method': 'PUT'
-    });
+}));
 
-    req.end('Test');
-    clearInterval(interval_id);
-  }, 10);
-});
+server.listen(common.PORT, 'localhost', common.mustCall(function() {
+  start = new Date();
+  const req = http.request({
+    'host': 'localhost',
+    'port': common.PORT,
+    'agent': false,
+    'method': 'PUT'
+  });
+  req.end('Test');
+}));
 
 process.on('exit', function() {
-  var end = new Date();
-  console.log(end.toISOString());
-  assert.equal(start.getSeconds(), end.getSeconds());
-  assert(end.getMilliseconds() < 900);
-  console.log('ok');
+  const end = new Date();
+  assert(end - start < 1000, 'Entire test should take less than one second');
 });