index.test.js

import createXmasTree from './index'

describe('Day 4 challenge', () => {
  test('is a xmas tree with height of 3', () => {
    // prettier-ignore
    expect(createXmasTree(3)).toBe(
    [
      '__*__',
      '_***_',
      '*****',
      '__#__',
      '__#__'
    ].join('\n')
  );
  })

  test('is a xmas tree with height of 5', () => {
    expect(createXmasTree(5)).toBe(
      [
        '____*____',
        '___***___',
        '__*****__',
        '_*******_',
        '*********',
        '____#____',
        '____#____',
      ].join('\n')
    )
  })
})