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

A functional programming library.

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

test('project(not using __)', () => {
  expect(
    project(['a', 'c'])([{a: 1, b: 2, c: 3, d: 4}, {a: 5, b: 6, c: 7, d: 8}, {a: 9, b: 10, c: 11, d: 12}])
  ).toEqual([{a: 1, c: 3}, {a: 5, c: 7}, {a: 9, c: 11}])
})

test('project(using __)', () => {
  expect(
    project(__, [{a: 1, b: 2, c: 3, d: 4}, {a: 5, b: 6, c: 7, d: 8}, {a: 9, b: 10, c: 11, d: 12}])(['a', 'c'])
  ).toEqual([{a: 1, c: 3}, {a: 5, c: 7}, {a: 9, c: 11}])
})