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

test('formatDuration is a Function', () => {
  expect(formatDuration).toBeInstanceOf(Function);
});
test('Returns the human readable format of the given number of milliseconds', () => {
  expect(formatDuration(1001)).toBe('1 second, 1 millisecond');
});
test('Returns the human readable format of the given number of milliseconds (negative)', () => {
  expect(formatDuration(-1001)).toBe('1 second, 1 millisecond');
});
test('Returns the human readable format of the given number of milliseconds', () => {
  expect(formatDuration(34325055574)).toBe(
    '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
  );
});