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