Andrew

lab-andrew/.eslintignore

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+**/*/vendor/

lab-andrew/.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-andrew/.gitignore

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

lab-andrew/README.md

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+## Exported objects
+
+I am exporting an object named Greet out of the greet.js file, and an object named Arithmetic out of the arithmetic.js file.
+
+### Methods
+
+#### Greet
+The Greet object has one method which is named hello. It has an arity of 1, it takes an parameter <name> which must be a string, and it will return 'hello <name>'. If <name> is not a string it will return null.
+
+#### Arithmetic
+The Arithmetic object has two methods, an add method and a sub method. They both have an arity of 2. Both arguments must be numbers, or else the function will return null. The add method will add the two numbers together, and the sub method will subtract the second argument from the first.

lab-andrew/__test__/arithmetic.test.js

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+'use strict';
+
+const arithmetic = require('../lib/arithmetic');
+
+describe('arithmetic.test.js', () => {
+
+  describe('testing arithmetic.add function for non number input', () => {
+
+    test('is one invalid input, \'\', and a number returned null', () => {
+      expect(arithmetic.add('', 3)).toBeNull();
+    });
+
+  });
+
+  describe('testing arithmetic.add function for legit input', () => {
+
+    test('is good input returned properly', () => {
+      expect(arithmetic.add(2, 3)).toBe(5);
+    });
+
+  });
+
+  describe('testing arithmetic.sub function for non number input', () => {
+
+    test('is one invalid input, \'\', and a number returned null', () => {
+      expect(arithmetic.sub('', 3)).toBeNull();
+    });
+
+  });
+
+  describe('testing arithmetic.sub function for legit input', () => {
+
+    test('is good input returned properly', () => {
+      expect(arithmetic.sub(7, 3)).toBe(4);
+    });
+
+  });
+
+});

lab-andrew/__test__/greet.test.js

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+'use strict';
+
+const greet = require('../lib/greet');
+
+describe('greet.test.js', () => {
+
+  describe('testing greet.hello function for non string input', () => {
+
+    test('is \'\' returned null', () => {
+      expect(greet.hello('')).toBeNull();
+    });
+
+    test('is a number returned as null', () => {
+      expect(greet.hello(9)).toBeNull();
+    });
+
+  });
+
+  describe('testing greet.hello function for legit input', () => {
+
+    test('is good input returned properly', () => {
+      expect(greet.hello('world')).toBe('hello world');
+    });
+
+  });
+
+});

lab-andrew/lib/arithmetic.js

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+'use strict';
+
+const Arithmetic = module.exports = {};
+
+Arithmetic.add = (a, b) => {
+  if (typeof a !== 'number' || typeof b !== 'number') return null;
+  return a + b;
+};
+
+Arithmetic.sub = (a, b) => {
+  if (typeof a !== 'number' || typeof b !== 'number') return null;
+  return a - b;
+};

lab-andrew/lib/greet.js

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+'use strict';
+
+const Greet = module.exports = {};
+
+Greet.hello = name => {
+  if (name === '' || typeof name !== 'string') return null;
+  return `hello ${name}`;
+};