75 lines
2.4 KiB
JavaScript
75 lines
2.4 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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// We've experienced a regression where the module loader stats a bunch of
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// directories on require() even if it's been called before. The require()
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// should caching the request.
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require('../common');
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const fs = require('fs');
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const assert = require('assert');
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const { fixturesDir } = require('../common/fixtures');
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let counter = 0;
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// Switch out the two stat implementations so that they increase a counter
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// each time they are called.
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const _statSync = fs.statSync;
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const _stat = fs.stat;
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fs.statSync = function() {
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counter++;
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return _statSync.apply(this, arguments);
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};
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fs.stat = function() {
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counter++;
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return _stat.apply(this, arguments);
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};
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// Load the module 'a' and 'http' once. It should become cached.
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require(`${fixturesDir}/a`);
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require('../fixtures/a.js');
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require('./../fixtures/a.js');
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require('http');
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console.log(`counterBefore = ${counter}`);
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const counterBefore = counter;
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// Now load the module a bunch of times with equivalent paths.
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// stat should not be called.
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for (let i = 0; i < 100; i++) {
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require(`${fixturesDir}/a`);
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require('../fixtures/a.js');
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require('./../fixtures/a.js');
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}
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// Do the same with a built-in module
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for (let i = 0; i < 100; i++) {
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require('http');
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}
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console.log(`counterAfter = ${counter}`);
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const counterAfter = counter;
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assert.strictEqual(counterBefore, counterAfter);
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