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

A functional programming library.

import __ from '../../src/Function/__'
/**
 * ((v, k) -> Boolean) -> {k: v} -> {k: v}
 */
import omitBy from '../../src/Object/omitBy'

test('omitBy(not using __)', () => {
  expect(
    omitBy((v, k) => k === v)({a: 1, b: 'b', c: 2, d: 'd'})
  ).toEqual({a: 1, c: 2})
})

test('omitBy(using __)', () => {
  expect(
    omitBy(__, {a: 1, b: 'b', c: 2, d: 'd'})((v, k) => k === v)
  ).toEqual({a: 1, c: 2})
})