catherine-looper

lab-catherine/.eslintignore

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

lab-catherine/.eslintrc.json

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+{
+    "env": {
+      "browser": true,
+      "node": true,
+      "commonjs": true,
+      "jest": true,
+      "es6": true
+    },
+    "globals": {
+      "err": true,
+      "req": true,
+      "res": true,
+      "next": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+      "sourceType": "module"
+    },
+    "rules": {
+      "no-console": "off",
+      "indent": [ "error", 2 ],
+      "quotes": ["error", "single", { "allowTemplateLiterals": true }],
+      "comma-dangle": ["error", "always-multiline"],
+      "semi": [ "error", "always" ]
+    }
+  }

lab-catherine/.gitignore

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+
+# Created by https://www.gitignore.io/api/osx,node
+
+### 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 ###
+*.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
+
+# End of https://www.gitignore.io/api/osx,node

lab-catherine/README.md

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+# Lab 03: Parallel File Processing
+
+In reader.js the exported module is an object with the textReader.readText function attached. The function has an arity of two (paths and callback). Paths is an array of filepaths to .txt files. Callback is the callback function which is sending the content of the array of .txt files. To return an array of strings containing the contents of the three text files, the three filepaths passed in the array must be valid. If those three filepaths are invalid, then an error object will be returned.

lab-catherine/__test__/reader.test.js

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+'use strict';
+
+const textReader = require('../lib/reader');
+const paths = [`${__dirname}/../assets/cat.txt`, `${__dirname}/../assets/elephant.txt`,`${__dirname}/../assets/seal.txt`];
+const invalidPaths = [`${__dirname}/../assets/cat`, `${__dirname}/../assets/elephant`,`${__dirname}/../assets/seal`];
+
+describe('reader.test.js', () => {
+
+  describe('testing to see if file text and file paths are displaying correctly', () => {
+
+    test('return the file text if there are no errors',
+      (done) => {
+        textReader.readText(paths, (error, data) => {
+          expect(error).toBeNull();
+          expect(data).toEqual([`Cats say meow!`, `Elephants are the largest land animals in the world.`, `Seals spend much of their life in water, but they mate, give birth to babies and take care of them on the shore.`]);
+          done();
+        });
+      });
+  });
+
+  describe('testing to see that incorrect file paths throw an error', () => {
+
+    test('throw an error if invalid file path', () => {
+      textReader.readText(invalidPaths, (error) => {
+        expect(error).not.toBeNull();
+      });
+    });
+  });
+});

lab-catherine/assets/cat.txt

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+Cats say meow!

lab-catherine/assets/elephant.txt

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+Elephants are the largest land animals in the world.

lab-catherine/assets/seal.txt

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+Seals spend much of their life in water, but they mate, give birth to babies and take care of them on the shore.

lab-catherine/lib/reader.js

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+'use strict';
+
+const textReader = module.exports = {};
+const fs = require('fs');
+const fileTextArray = [];
+
+textReader.readText = (paths, callback) => {
+  fs.readFile(paths[0], (error, data) => {
+    if(error) return callback(error);
+    fileTextArray.push(data.toString());
+    fs.readFile(paths[1], (error, data) => {
+      if(error) return callback(error);
+      fileTextArray.push(data.toString());
+      fs.readFile(paths[2], (error, data) => {
+        if(error) return callback(error);
+        fileTextArray.push(data.toString());
+        callback(null, fileTextArray);
+      });
+    });
+  });
+};