log files hex data in order

data/one.txt

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+babnsnsnmnmnmnmnmnmnmn file one

data/three.txt

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+hellllllloooooo file three

data/two.txt

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+askjdhsakjhdkajshdkjashdkajshdk file two

index.js

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+'use strict';
+var box = [];
+
+exports.box = box;
+// const fs = require('fs');
+const fileReader = require('./lib/file-reader.js');
+
+fileReader('./data/one.txt', function(err, data) {
+  var buff1 = Buffer.from(data).toString('hex').substring(0,8);
+  console.log(buff1, data);
+  box.push(buff1);
+  fileReader('./data/two.txt', function(err, data) {
+    var buff2 = Buffer.from(data).toString('hex').substring(0,8);
+    console.log(buff2, data);
+    box.push(buff2);
+    fileReader('./data/three.txt', function(err, data) {
+      var buff3 = Buffer.from(data).toString('hex').substring(0,8);
+      console.log(buff3, data);
+      box.push(buff3);
+      console.log(box );
+    });
+  });
+});

lib/error-middleware.js

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+'use strict';
+
+const createError = require('http-errors');
+const debug = require('debug')('cfgram:error-middleware');
+
+module.exports = function(err, req, res, next) {
+  debug('error middleware');
+
+  console.error('msg:', err.message);
+  console.error('name:', err.name);
+
+  if (err.name === 'ValidationError') {
+    err = createError(400, err.message);
+    res.status(err.status).send(err.name);
+    next();
+    return;
+  }
+
+  if (err.status) {
+    res.status(err.status).send(err.name);
+    next();
+    return;
+  }
+
+
+  err = createError(500, err.message);
+  res.status(err.status).send(err.name);
+  next();
+};

lib/file-reader.js

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+'use strict';
+
+const fs = require('fs');
+const fileReader = module.exports = function(file, callback) {
+  fs.readFile(file, function(err, data){
+    if(err) return callback(err);
+    return callback(null, data.toString());
+  });
+};

package.json

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+{
+  "name": "03-parallel_file_processing",
+  "version": "1.0.0",
+  "description": "![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) Lab 03: Parallel File Processing\r ===",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/noahgribbin/03-parallel_file_processing.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/noahgribbin/03-parallel_file_processing/issues"
+  },
+  "homepage": "https://github.com/noahgribbin/03-parallel_file_processing#readme",
+  "devDependencies": {
+    "chai": "^3.5.0",
+    "mocha": "^3.2.0"
+  }
+}

test/file-reader-test.js

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+'use strict';
+
+const expect = require('chai').expect;
+const fileReader = require('../lib/file-reader.js');
+const box = require('box');
+
+describe('File Reader Module', function(){
+  describe('with an impropper filepath', function(){
+    it('should return an error', function(done){
+      fileReader(`${__dirname}/not-a-file.txt`, function(err){
+        expect(err).to.be.an('error');
+        done();
+      });
+    });
+    it('should log the hex values in order', function(done){
+      // TODO: test for logs in correct order
+      // expect(box).to.equal([]);
+      //
+      done();
+    });
+  });
+  describe('with a propper file path', function(){
+    it('should return the contents of the file', function(done){
+      fileReader(`${__dirname}/../data/one.txt`, function(err, data){
+        expect(err).to.equal(null);
+        expect(data).to.equal('this is the first file\r\n');
+        done();
+      });
+    });
+  });
+});