const expect = require('expect');
const flip = require('./flip.js');


  test('flip is a Function', () => {
  expect(flip).toBeInstanceOf(Function);
});
  let a = { name: 'John Smith' };
  let b = {};
  const mergeFrom = flip(Object.assign);
  let mergePerson = mergeFrom.bind(null, a);
  t.deepEqual(mergePerson(b), a, 'Flips argument order');