1.      1var assert = require('assert');

    2.      1var fs = require('fs');

    3.      0var pathExists = require('fs').existsSync || require('path').existsSync;

    4.      1

    5.     40exports.deleteFile = function(name) {

    6.     40    try {

    7.     40        fs.unlinkSync(name);

    8.     23    } catch(err) {

    9.      0        if (err.errno !== process.ENOENT && err.code !== 'ENOENT' && err.syscall !== 'unlink') {

   10.      0            throw err;

   11.      0        }

   12.     23    }

   13.     40};

   14.      1

   15.      5exports.ensureExists = function(name,cb) {

   16.      1    if (!pathExists(name)) {

   17.      1        fs.mkdirSync(name);

   18.      1    };

   19.      5}

   20.      1

   21.      2assert.fileDoesNotExist = function(name) {

   22.      2    try {

   23.      2        fs.statSync(name);

   24.      1    } catch(err) {

   25.      0        if (err.errno !== process.ENOENT && err.code !== 'ENOENT' && err.syscall !== 'unlink') {

   26.      0            throw err;

   27.      0        }

   28.      1    }

   29.      2};

   30.      1

   31.      6assert.fileExists = function(name) {

   32.      6    try {

   33.      6        fs.statSync(name);

   34.      0    } catch(err) {

   35.      0        throw err;

   36.      0    }

   37.      6};