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


  test('remove is a Function', () => {
  expect(remove).toBeInstanceOf(Function);
});
  test('Removes elements from an array for which the given function returns false', () => {
  expect(remove([1, 2, 3, 4], n => n % 2 === 0), [2).toEqual(4])
});