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

test('bind is a Function', () => {
  expect(bind).toBeInstanceOf(Function);
});
function greet(greeting, punctuation) {
  return greeting + ' ' + this.user + punctuation;
}
const freddy = { user: 'fred' };
const freddyBound = bind(greet, freddy);
test('Binds to an object context', () => {
  expect(freddyBound('hi', '!')).toBe('hi fred!');
});