npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

mockfs

v0.1.5

Published

Mocking FS module implementation for testing purpouses

Downloads

1,760

Readme

mockfs

Build Status Coverage Status NPM version Dependency Status

MockFS - Mocking FS module implementation for testing purpouses.

Basic idea is to declare file system contents via JSON spec, mount it, and use through real fs.* functions like an ordinary one.

/**
 * /
 *  file-buffer
 *  file-base64
 *  file-string
 *  file-alt
 *  dir/
 *      file-in-dir
 */
var fs = require('fs'),
    MockFS = require('mockfs'),
    spec, mfs, fd;

spec = {
  time: 'Tue May 07 2013 17:09:57 GMT+0400' // global default time for any FS item, optional
  ctime: new Date(),                        // creation time default, optional
/*atime: ...,                               // atime and ctime is not set
  mtime: ...,*/                             // value is taken from FS defaults (time)
  items: {
    'file-buffer': new Buffer('qwerty'),    // specify content as Buffer
    'file-base64': new Buffer('cXdlcnR5', 'base64'), // buffer with encoding
    'file-string': 'qwerty',                // or as string
    'file-alt': {                           // alternative syntax
      uid: 'johndoe',                       // owner user, as login name or id
      gid: 300,                             // owner group
      mode: 0766,                           // access mode
      atime: new Date(),                    // Date instance
      mtime: 1000255364,                    // timestamp
      ctime: "-500"                         // number with a sign (+/-) - delta from fs default value
      content: 'asobject'                   // file content
    },
    'dir': {                                // directory - always an object with items property (which is object too)
      atime: 'Tue May 07 2013 17:09:57 GMT+0400' // Date as string
      mtime: "+500",                        // stats, uid, gid, mode - on directories too
    /*ctime*/                               // ctime is not set, value taken from FS defaults  
      items: {                              // directory contents
        'file-in-dir': 'inside directory'             
      }
    }
};

mfs = new MockFS(spec);
mfs.mount('/mnt/mock');

fs.existsSync('/mnt/mock/file-buffer'); // true
fs.readFileSync('/mnt/mock/file-string').toString(); // "qwerty"
fs.readFile('/mnt/mock/dir/file-in-dir', function(e, r){
    Buffer.isBuffer(r); // true
    r.toString(); // "inside directory"
});

// file descriptors is also works
fs.open('/mnt/mock/file-base64', 'r', function(e, fd){
    if(fd) {
        var buf = new Buffer(100);
        fs.read(fd, buf, 0, 100, null, function(e, bytesRead){
            console.log(bytesRead); // 6
            console.log(buf.toString('utf8', 0, bytesRead)); // qwerty
            fs.closeSync(fd);
        });    
    }
});

mfs.umount('/mnt/mock');

fs.existsSync('/mnt/mock/file-buffer'); // false

Implemented by wrapping bundled fs module's basic functions (file descriptors handling, stat, rename/delete files/directories). So, functions as createReadStream, appendFileSync and so are supported "out of the box" without any wrapping.

Currently, NodeJS v0.8+ is supported.

TODO

  • Support legacy interfaces
  • Access rights check (read/write/search permissions)
  • *chown(Sync), *chmod(Sync) functions
  • Links support
  • (un)watch(File) support
  • mirror utility to create MockFS specs from real file systems
  • Integrate with some date parsing library for convinient atime/ctime/mtime specification

Roadmap

v0.2

  • Access rights check (read/write/search permissions)
  • *chown(Sync), *chmod(Sync) functions

v0.3

  • Links support
  • (un)watch(File) support

v1.0

  • Support legacy interfaces
  • Pass NodeJS test suite

Similar libraries