Lab dalton

.eslintignore

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

.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" ]
+    }
+  }

.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

__test__/reader.test.js

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+'use strict';
+
+const textReader = require('../lib/reader');
+const paths = [`${__dirname}/../assets/demo1.txt`, `${__dirname}/../assets/demo2.txt`,`${__dirname}/../assets/demo3.txt`];
+const badPaths = [``,``,``];
+
+
+describe('reader.test.js', () => {
+
+  describe('testing to see if file text reads right', () => {
+
+    test('return the file text if there are no errors',
+      (run) => {
+        textReader.readText(paths, (error, data) => {
+          expect(error).toBeNull();
+          expect(data).toEqual([`Yo demo one here`, `yo demo 2 here`, `yo demo 3 here`]);
+          run();
+        });
+      });
+  });
+
+  describe('testing to see that incorrect file paths throw an error', () => {
+
+    test('throw an error if invalid file path', () => {
+      textReader.readText(badPaths, (error) => {
+        expect(error).not.toBeNull();
+      });
+    });
+  });
+});

assets/demo1.txt

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+Yo demo one here

assets/demo2.txt

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+yo demo 2 here

assets/demo3.txt

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+yo demo 3 here

lib/reader.js

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