A node/npm functions template

__tests__.funcs.spec.js

// __tests__/funcs.spec.js

const funcs = require("../libs/funcs")()

describe('hello', () => {
  it('should say hello', () => {
    expect(funcs.hello()).toBe('world!')
  })
})

describe('world', () => {
  it('should caculate world', () => {
    expect(funcs.world([1, 2]) === [2, 4])
  })
})

libs.funcs.js

// libs/funcs.js
exports = module.exports = (options) => {

  // PRIVATE FUNCTION(S)

  // get a random integer between 0 (zero) and max
  function random_wait(max) {
    return Math.floor(Math.random() * (max + 1))
  }

  // PRIVATE VARIABLE(S)
  const private_count = 'something'

  // PUBLIC FUNCTION(S)
  return {
    hello: function (params) {
      return 'world!'
    },
    world: function (params) {
      return params.map( p => {
        return p * 2
      })
    }
  }
}

package.json

// package.json
{
  // ...
  "scripts": {
    "test": "jest",
    "start": "babel-node --presets env $npm_package_main"
  },
  // ...
}