12345678910111213141516171819202122232425262728293031323334353637383940414243
import {flip} from './flip'import {subtract} from './subtract'import {update} from './update'
test('function with arity of 2', () => {  const subtractFlipped = flip(subtract)
  expect(subtractFlipped(1)(7)).toEqual(6)  expect(subtractFlipped(1, 7)).toEqual(6)  expect(subtractFlipped(1, 7, 9)).toEqual(6)})
test('function with arity of 3', () => {  const updateFlipped = flip(update)
  const result = updateFlipped(88, 0, [1, 2, 3])  const curriedResult = updateFlipped(88, 0)([1, 2, 3])  const tripleCurriedResult = updateFlipped(88)(0)([1, 2, 3])  expect(result).toEqual([88, 2, 3])  expect(curriedResult).toEqual([88, 2, 3])  expect(tripleCurriedResult).toEqual([88, 2, 3])})
test('function with arity of 4', () => {  const testFunction = (a, b, c, d) => `${a - b}==${c - d}`  const testFunctionFlipped = flip(testFunction)
  const result = testFunction(1, 2, 3, 4)  const flippedResult = testFunctionFlipped(2, 1, 3, 4)  expect(result).toEqual(flippedResult)  expect(result).toEqual('-1==-1')})
test('function with arity of 5', () => {  const testFunction = (a, b, c, d, e) => `${a - b}==${c - d - e}`  const testFunctionFlipped = flip(testFunction)
  expect(() => testFunctionFlipped(1, 2, 3, 4, 5)).toThrowWithMessage(    Error,    "R.flip doesn't work with arity > 4"  )})