test: add loaded modules test

This makes sure there is no regression by switching to loading
eagerly.

PR-URL: nodejs#20567
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

test/parallel/test-bootstrap-modules.js

@@ -0,0 +1,14 @@
+/* eslint-disable node-core/required-modules */
+
+'use strict';
+
+// Ordinarily test files must require('common') but that action causes
+// the global console to be compiled, defeating the purpose of this test.
+// This makes sure no additional files are added without carefully considering
+// lazy loading. Please adjust the value if necessary.
+
+const list = process.moduleLoadList.slice();
+
+const assert = require('assert');
+
+assert(list.length <= 73, list);