FP style testing.js

const test = require('tape')
const reduce = require('lodash').reduce

// [Element] -> {Name: Value}
const parseFormValues = (elements = []) => (
  elements.reduce((result, { name, value }) => {
    if (!name || !value) { return result }
    return Object.assign(result, {
      [name]: value,
    })
  }, {})
)

// { Key: Value } -> String
const stringifyFormValues = (values) => (
  reduce(values, (result, currentValue, key) => (
    result + `&${key}=${currentValue}`
  ), '').substring(1)
)

test('parseFormValues', (t) => {
  t.equals(typeof parseFormValues, 'function')
  t.end()
})

test('parseFormValues with no values', (t) => {
  const values = parseFormValues()
  t.deepEqual(values, {})
  t.end()
});

test('parseFormValues with empty array', (t) => {
  const values = parseFormValues([])
  t.deepEqual(values, {})
  t.end()
});

test('parseFormValues with values', (t) => {
  const values = parseFormValues([{
    name: 'awesome',
    value: 'sauce'
  }, {
    name: 'lame',
    value: 'sausage',
  }])
  
  t.deepEqual(values, { awesome: 'sauce', lame: 'sausage' })
  t.end()
});

test('stringifyFormValues', (t) => {
  t.equals(typeof stringifyFormValues, 'function')
  t.end()
})

test('stringifyFormValues with no values', (t) => {
  const s = stringifyFormValues()
  t.equal(s, '')
  t.end()
});

test('stringifyFormValues with empty object', (t) => {
  const s = stringifyFormValues({})
  t.equal(s, '')
  t.end()
});

test('stringifyFormValues with values', (t) => {
  const s = stringifyFormValues({ awesome: 'sauce', lame: 'sausage' })
  t.equal(s, 'awesome=sauce&lame=sausage')
  t.end()
});