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


  test('prettyBytes is a Function', () => {
  expect(prettyBytes).toBeInstanceOf(Function);
});
  test('Converts a number in bytes to a human-readable string.', () => {
  expect(prettyBytes(1000)).toBe('1 KB')
});
  test('Converts a number in bytes to a human-readable string.', () => {
  expect(prettyBytes(-27145424323.5821, 5)).toBe('-27.145 GB')
});
  test('Converts a number in bytes to a human-readable string.', () => {
  expect(prettyBytes(123456789, 3, false)).toBe('123MB')
});