walk-through.txt

Hello World

npm init -y
touch index.js hello.js
npm install commander
--
index.js
  const program = require('commander')                                                          
  program.option('-n, --name <string>', 'whats your name')                                      
  program.parse(process.argv)
  console.log(program.name)

hello.js
  const hello = (name) => name
  exports.hello = hello

mkdir tests
touch tests/hello.test.js

tests/hello.test.js
  const { hello } = require('../hello')
  const name = hello('joe') //mr anderson
  console.log(name)

index.js
  if (!process.argv.slice(2).length) {                                                          
    program.outputHelp()                                                                        
    process.exit()                                                                              
   }                                                                                             
   console.log(hello(program.name))

%> node index.js
%> node index.js --name joe

/// https://jestjs.io/

npm install --save-dev jest
npm run test

tests/hello.test.js
describe('hello module', () => {                                                  
  test('name returns with hello', () => {
    const testName = 'joe'                                                        
    const returnedName = hello(testName)                                          
    expect(returnedName).toBe(returnedName)
  })                                                                              
})

// make return 'hello joe'
// make return 'hello, joe'
// make return 'Hello, Joe!'

tests/hello.test.js
  return s.charAt(0).toUpperCase() + s.slice(1)


---------------------

mkdir weather
npm init -y
cp hello index / remove hello

// darksky.net -> get api key
// https://api.darksky.net/forecast/KEY/37.8267,-122.4233
// opencagedata.com -> get api key
// https://api.opencagedata.com/geocode/v1/json?key=KEY&q=Orlando,%20FL

index.js
  require('dotenv').config()

package.json
  "jest": {                                                                                    
     "setupFiles": ["./tests/setup.js"]                                                          
   }, 

tests/setup.js
   console.log('Loading .env file for tests')                                                    
   require('dotenv').config({ path: '.env.test' })  

npm install --save-dev nock
//https://github.com/nock/nock#specifying-path