moy-fp/test/Function/invoker.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * Number -> String -> ((a, b, ..., m, Object) -> *)
 */
import invoker from '../../src/Function/invoker'

test('invoker(not using __)', () => {
  expect(
    invoker(1, 'slice')(1, 'murakami')
  ).toBe('urakami')
})

test('invoker(using __)', () => {
  expect(
    invoker(2, 'slice')(1, __, 'murakami')(6)
  ).toBe('uraka')
})