moy-fp/test/String/concatString.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * String -> String -> String
 */
import concatString from '../../src/String/concatString'

test('concatString(not using __)', () => {
  expect(
    concatString(' kennzo')('murakami')
  ).toBe('murakami kennzo')
})

test('concatString(using __)', () => {
  expect(
    concatString(__, 'murakami')(' kennzo')
  ).toBe('murakami kennzo')
})