const expect = require('expect');
const {partition} = require('./_30s.js');

test('partition is a Function', () => {
  expect(partition).toBeInstanceOf(Function);
});
const users = [{ user: 'barney', age: 36, active: false }, { user: 'fred', age: 40, active: true }];
test("Groups the elements into two arrays, depending on the provided function's truthiness for each element.", () => {
  expect(partition(users, o => o.active)).toEqual([
    [{ user: 'fred', age: 40, active: true }],
    [{ user: 'barney', age: 36, active: false }]
  ]);
});