Lab03 andy

.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

.eslintrc

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+{
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": [ "error", "single" ],
+    "semi": ["error", "always"],
+    "linebreak-style": [ "error", "unix" ]
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true,
+    "jasmine": true
+  },
+  "ecmaFeatures": {
+    "modules": true,
+    "experimentalObjectRestSpread": true,
+    "impliedStrict": true
+  },
+  "extends": "eslint:recommended"
+}

.gitignore

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+# Created by https://www.gitignore.io/api/osx,vim,node,macos,windows
+
+### macOS ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+
+### OSX ###
+
+# Icon must end with two \r
+
+# Thumbnails
+
+# Files that might appear in the root of a volume
+
+# Directories potentially created on remote AFP share
+
+### Vim ###
+# swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.gitignore.io/api/osx,vim,node,macos,windows

README.md

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-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 04: Parallel File Processing
-===
-
-## Submission Instructions
-  * fork this repository & create a new branch for your work
-  * write all of your code in a directory named `lab-` + `<your name>` **e.g.** `lab-susan`
-  * push to your repository
-  * submit a pull request to this repository
-  * submit a link to your PR in canvas
-  * write a question and observation on canvas
-
-## Learning Objectives  
-  * students will be able to create asynchronous programs using the node.js callback pattern
-  * students will be able to read, write, and encode binary data using the Buffer class
-  * students will be able to utilize the built-in `fs` module for basic file system I/O operations
-  * students will be able to use `done` (provided by mocha.js) for creating asynchronous tests
-
-## Resources  
-  * [fs module docs](https://nodejs.org/api/fs.html)
-
-## Requirements  
-
-#### Configuration  
-<!-- list of files, configurations, tools, etc that are required -->
-* include the following:
-  * **README.md** - contains documentation about your lab
-  * **.gitignore** - contains a robust `.gitignore` file
-  * **.eslintrc** - contains the provided `.eslintrc` file
-  * **.eslintignore** - contains the provided `.eslintignore` file
-  * **lib/** - contains your modules
-  * **test/** - contains your unit tests
-  * **assets/** - contains the text files used by the program
-  * **index.js** - contains main program file
-
-#### Feature Tasks  
-  * for this assignment you will need to read three files and `console.log` the first 8 bytes ***(in hex)*** of each file
-  * regardless of file size, all three files should be read and logged in the order `'one.txt'`, `'two.txt'`, `'three.txt'`
-
-#### Testing  
-  * create a test that guarantees that the files are logged in the proper order
-  * create a test that checks for improper file paths
-
-####  Documentation
-  * create a simple description of your project
-  * create a simple layer of documentation that describes how to use `done` in mocha callbacks
+Done kicks us out of the test because we're working asynchronously. 

assets/one.txt

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+This text has one

assets/three.txt

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+This text is a lot longer than the otherones, probably because three is the biggest number, but lets be real, it probably has something to do with the randomness of the universe, sort of like what brandi was talking about in terms of Karma, but on a more quantum scale.
+
+What i'm really trying to get at here is that we don't have any control over anything except our own decisions, and it was my decision to make this one longer, because i chose it randomly. 

assets/two.txt

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+This one is two, which is slightly longer than one. 

index.js

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+'use strict';
+
+const readFiles = require('./lib/file-reader.js');
+const paths = [
+  `${__dirname}/assets/one.txt`,
+  `${__dirname}/assets/two.txt`,
+  `${__dirname}/assets/three.txt`
+];
+
+readFiles(paths, function(err, data){
+  console.log('Some data:', data);
+});

lib/file-reader.js

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+'use strict';
+
+const fs = require('fs');
+
+const fileReader = module.exports = function(paths, callback){
+  let buffers = [];
+  fs.readFile(paths[0], function(err, data){
+    if (err) return callback(err);
+    buffers.push(data.toString('hex', 0, 8));
+
+    fs.readFile(paths[1], function(err, data){
+      if (err) return callback(err);
+      buffers.push(data.toString('hex', 0, 8));
+
+      fs.readFile(paths[2], function(err, data){
+        if (err) return callback(err);
+        buffers.push(data.toString('hex', 0, 8));
+        return callback(null, buffers);
+      });
+    });
+  });
+};

package.json

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+{
+  "name": "03-parallel_file_system",
+  "version": "1.0.0",
+  "description": "![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 04: Parallel File Processing ===",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/codefellows-javascript-401d17/03-parallel_file_system.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/codefellows-javascript-401d17/03-parallel_file_system/issues"
+  },
+  "homepage": "https://github.com/codefellows-javascript-401d17/03-parallel_file_system#readme",
+  "devDependencies": {
+    "chai": "^4.1.0",
+    "mocha": "^3.4.2"
+  }
+}

test/file-reader-test.js

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+'use strict';
+
+const expect = require('chai').expect;
+const fileReader = require('../lib/file-reader.js');
+
+describe('file reading module', function(){
+  describe('bad file path', function(){
+    it('should give an error', function(done){
+      fileReader(`${__dirname}/bad-file.txt`, function(err){
+        expect(err).to.be.a('error');
+        done();
+      });
+    });
+  });
+
+  describe('Good path and data', function(){
+    it('should return wierd numbers, ending in 78, 65, 78', function(done){
+      let paths = [
+        `${__dirname}/../assets/one.txt`,
+        `${__dirname}/../assets/two.txt`,
+        `${__dirname}/../assets/three.txt`
+      ];
+      fileReader(paths, function(err, data){
+        expect(err).to.equal(null);
+        expect(data).to.be.an('array');
+        expect(data).to.deep.equal([ '5468697320746578', '54686973206f6e65', '5468697320746578' ]);
+        done();
+      });
+    });
+  });
+});