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

A functional programming library.

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

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

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