'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.

const common = require('../common');

const fs = require('fs');

const assert = require('assert');

var counter = 0;

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

// each time they are called.

var _statSync = fs.statSync;

var _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(common.fixturesDir + '/a');

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

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

require('http');

console.log('counterBefore = %d', counter);

var 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(common.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 = %d', counter);

var counterAfter = counter;

assert.equal(counterBefore, counterAfter);