node/test/sequential/test-require-cache-without-stat.js at main · fetchapi/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

// We've experienced a regression where the module loader stats a bunch of

// directories on require() even if it's been called before. The require()

// should caching the request.

require('../common');

const fs = require('fs');

const assert = require('assert');

const { fixturesDir } = require('../common/fixtures');

let counter = 0;

// Switch out the two stat implementations so that they increase a counter

// each time they are called.

const _statSync = fs.statSync;

const _stat = fs.stat;

fs.statSync = function() {

counter++;

return _statSync.apply(this, arguments);

};

fs.stat = function() {

counter++;

return _stat.apply(this, arguments);

};

// Load the module 'a' and 'http' once. It should become cached.

require(`${fixturesDir}/a`);

require('../fixtures/a.js');

require('./../fixtures/a.js');

require('http');

console.log(`counterBefore = ${counter}`);

const counterBefore = counter;

// Now load the module a bunch of times with equivalent paths.

// stat should not be called.

for (let i = 0; i < 100; i++) {

require(`${fixturesDir}/a`);

require('../fixtures/a.js');

require('./../fixtures/a.js');

}

// Do the same with a built-in module

for (let i = 0; i < 100; i++) {

require('http');

}

console.log(`counterAfter = ${counter}`);

const counterAfter = counter;

assert.strictEqual(counterBefore, counterAfter);

node/test/sequential/test-require-cache-without-stat.js at main · fetchapi/node · GitHub

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