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

test('attempt is a Function', () => {
  expect(attempt).toBeInstanceOf(Function);
});
test('Returns a value', () => {
  expect(attempt(() => 0)).toBe(0);
});
test('Returns an error', () => {
  expect(attempt(() => {throw new Error();})).toBeInstanceOf(Error);
});