moy-fp/test/Object/keys.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * {k: v} -> [k]
 */
import keys from '../../src/Object/keys'

test('keys(not using __)', () => {
  expect(
    keys({a: 1, b: 2, c: 3})
  ).toEqual(['a', 'b', 'c'])
})

test('keys(using __)', () => {
  expect(
    keys(__)({a: 1, b: 2, c: 3})
  ).toEqual(['a', 'b', 'c'])
})