reedx/src/utils/__tests__/createTypes.js

Like redux but with less code

import createTypes from '../createTypes'

const NAME = 'counter'

const INCREMENT = '@@reedx/counter/INCREMENT'
const HANDLE_INCREMENT = '@@reedx/counter/HANDLE_INCREMENT'

const increment = (state) => state + 1
const handleIncrement = (state) => state + 1

test('create types using handlers object property', () => {
  const types = createTypes(NAME, { increment, handleIncrement })

  expect(types[0]).toBe(INCREMENT)
  expect(types[1]).toBe(HANDLE_INCREMENT)
})

test('throw if a handler is not a function', () => {
  expect(() => createTypes(NAME, { increment: 'string' })).toThrow()
})