Lab-Pedja

lab-pedja/.eslintignore

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

lab-pedja/.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-pedja/.gitignore

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+# Created by https://www.gitignore.io/api/osx,vim,node,linux,windows,visualstudiocode
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### 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
+
+### 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
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+.history
+
+### 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,linux,windows,visualstudiocode

lab-pedja/README.md

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+![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) Lab class 01: Node Ecosystem
+===
+
+#### greet Module
+NodeJS module `greet` located in the lib/ directory(`lib/greet.js`) and it exports a single function - `greet.hi`.
+* The `greet.hi` function has a single parameter (arity of one) that should expect a string as it's input
+* The `greet.hi` function returns the input name, concatenated with "hello ": eg. ("hello world")
+* The `greet.hi` function returns `null` if the input is not a string.
+
+#### arithmetic Module
+NodeJS module `arithmetic` located in the lib/ directory (`lib/arithmetic.js`) and it exports an object. This module has `add` and `sub` methods that implement addition and subtraction.  
+* The `add` method takes two parameters;
+  * If either parameter is a non-number the function returns `null`
+  * Else return the sum of the 2 numbers
+* The `sub` method also takes two parameters;
+  * If either parameter is a non-number the function returns `null`
+  * Else it return the second parameter subtracted from the first parameter.
+
+## Used Resources  
+* [Jest Getting Started](https://facebook.github.io/jest/docs/en/getting-started.html)
+* [Jest Globals](https://facebook.github.io/jest/docs/en/api.html#content)
+* [Jest Expect](https://facebook.github.io/jest/docs/en/expect.html#content)

lab-pedja/__test__/arithmetic.test.js

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+'use strict';
+
+const arithmetic = require('../lib/arithmetic');
+
+describe('arithmetic.test.js', () => {
+
+  test('arithmetic.add has 2 number params and returns their sum', () => {
+    expect(arithmetic.add(1,2)).toBe(3);
+  });
+
+  test('arithmetic.add return null is one param is not a number', () => {
+    expect(arithmetic.add(12, '')).toBeNull();
+    expect(arithmetic.add('', 12)).toBeNull();
+    expect(arithmetic.add('hello', 12)).toBeNull();
+    expect(arithmetic.add(12, 'hello')).toBeNull();
+    expect(arithmetic.add('', '')).toBeNull();
+    expect(arithmetic.add('hello', 'world')).toBeNull();
+  });
+
+  test('arithmetic.sub has 2 number params and returns second param subtracted from the first one', () => {
+    expect(arithmetic.sub(2,1)).toBe(1);
+  });
+
+  test('arithmetic.sub return null is one param is not a number', () => {
+    expect(arithmetic.sub(12, '')).toBeNull();
+    expect(arithmetic.sub('', 12)).toBeNull();
+    expect(arithmetic.sub('Pedja', 12)).toBeNull();
+    expect(arithmetic.sub(12, 'Pedja')).toBeNull();
+    expect(arithmetic.sub('', '')).toBeNull();
+    expect(arithmetic.sub('hello', 'world')).toBeNull();
+  });
+
+});

lab-pedja/__test__/greet.test.js

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+'use strict';
+
+const greet = require('../lib/greet');
+
+describe('greet.test.js', () => {
+
+  test('greet.hi has single string param and returns "hello <name>', () => {
+    expect(greet.hi('world')).toEqual('hello world');
+  });
+
+  test('greet.hi returns null if input is not a string', () => {
+    expect(greet.hi('')).toBeNull();
+    expect(greet.hi(1234)).toBeNull();
+    expect(greet.hi(true)).toBeNull();
+  });
+
+});

lab-pedja/lib/arithmetic.js

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+'use strict';
+
+const arithmetic = module.exports = {};
+
+arithmetic.add = (param1, param2) => {
+  if(typeof param1 !== 'number' || typeof param2 !== 'number')
+    return null;
+  return param1 + param2;
+};
+
+arithmetic.sub = (param1, param2) => {
+  if(typeof param1 !== 'number' || typeof param2 !== 'number')
+    return null;
+  return param1 - param2;
+};

lab-pedja/lib/greet.js

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

lab-pedja/package.json

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+{
+  "name": "01-node-ecosystem",
+  "version": "1.0.0",
+  "description": "Class01_ecosystem",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pjosifovic/01-node-ecosystem.git"
+  },
+  "author": "Pedja",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/pjosifovic/01-node-ecosystem/issues"
+  },
+  "homepage": "https://github.com/pjosifovic/01-node-ecosystem#readme",
+  "devDependencies": {
+    "jest": "^21.2.1"
+  }
+}