"use strict";

const flip2 = require("../../src/deps/fp/flip2");

function threeArgs(one, two, three) {
  return [one, two, three];
}

test('returns a function which inverts the first two arguments to the supplied function', function () {
  const f = function f(a, b, c) {
    return a + ' ' + b + ' ' + c;
  };

  const g = flip2(f);
  expect(f('a', 'b', 'c')).toEqual('a b c');
  expect(g('a', 'b', 'c')).toEqual('b a c');
});
test('returns a curried function', function () {
  const f = function f(a, b, c) {
    return a + ' ' + b + ' ' + c;
  };

  const g = flip2(f)('a');
  expect(g('b', 'c')).toEqual('b a c');
});
test('flip2 fosho', function () {
  const oneTwoThree = function oneTwoThree($1, $2, $3) {
    const flipped = flip2(threeArgs);
    const actual = flipped($1, $2, $3);
    const usual = threeArgs($1, $2, $3); // flipped 1 & 2 (same as .slice.reverse)

    expect(actual[0]).toEqual(usual[1]);
    expect(actual[1]).toEqual(usual[0]); // only flips 2 <- disabled this
    // expect(actual[2]).toEqual(usual[2])
  };

  oneTwoThree(1, 2, 3);
});