test: use common.mustCall() instead of exit handle

PR-URL: #14262
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http-server-keep-alive-timeout.js

@@ -1,7 +1,6 @@
 'use strict';
 
 const common = require('../common');
-const assert = require('assert');
 const http = require('http');
 const net = require('net');
 
@@ -20,14 +19,9 @@ function run() {
 }
 
 test(function serverEndKeepAliveTimeoutWithPipeline(cb) {
-  let requestCount = 0;
-  process.on('exit', () => {
-    assert.strictEqual(requestCount, 3);
-  });
-  const server = http.createServer((req, res) => {
-    requestCount++;
+  const server = http.createServer(common.mustCall((req, res) => {
     res.end();
-  });
+  }, 3));
   server.setTimeout(500, common.mustCall((socket) => {
     // End this test and call `run()` for the next test (if any).
     socket.destroy();
@@ -49,13 +43,7 @@ test(function serverEndKeepAliveTimeoutWithPipeline(cb) {
 });
 
 test(function serverNoEndKeepAliveTimeoutWithPipeline(cb) {
-  let requestCount = 0;
-  process.on('exit', () => {
-    assert.strictEqual(requestCount, 3);
-  });
-  const server = http.createServer((req, res) => {
-    requestCount++;
-  });
+  const server = http.createServer(common.mustCall(3));
   server.setTimeout(500, common.mustCall((socket) => {
     // End this test and call `run()` for the next test (if any).
     socket.destroy();

test/parallel/test-https-server-keep-alive-timeout.js

@@ -4,7 +4,6 @@ const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');
 
-const assert = require('assert');
 const https = require('https');
 const tls = require('tls');
 const fs = require('fs');
@@ -29,14 +28,11 @@ function run() {
 }
 
 test(function serverKeepAliveTimeoutWithPipeline(cb) {
-  let requestCount = 0;
-  process.on('exit', function() {
-    assert.strictEqual(requestCount, 3);
-  });
-  const server = https.createServer(serverOptions, (req, res) => {
-    requestCount++;
-    res.end();
-  });
+  const server = https.createServer(
+    serverOptions,
+    common.mustCall((req, res) => {
+      res.end();
+    }, 3));
   server.setTimeout(500, common.mustCall((socket) => {
     // End this test and call `run()` for the next test (if any).
     socket.destroy();
@@ -59,13 +55,7 @@ test(function serverKeepAliveTimeoutWithPipeline(cb) {
 });
 
 test(function serverNoEndKeepAliveTimeoutWithPipeline(cb) {
-  let requestCount = 0;
-  process.on('exit', () => {
-    assert.strictEqual(requestCount, 3);
-  });
-  const server = https.createServer(serverOptions, (req, res) => {
-    requestCount++;
-  });
+  const server = https.createServer(serverOptions, common.mustCall(3));
   server.setTimeout(500, common.mustCall((socket) => {
     // End this test and call `run()` for the next test (if any).
     socket.destroy();