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

A functional programming library.

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

test('has(not using __), return true', () => {
  expect(
    has('a')({a: 1, b: 2, c: 3})
  ).toBeTruthy()
})

test('has(not using __), return false', () => {
  expect(
    has('d')({a: 1, b: 2, c: 3})
  ).toBeFalsy()
})

test('has(using __), return true', () => {
  expect(
    has(__, {a: 1, b: 2, c: 3})('a')
  ).toBeTruthy()
})