programming-challenges/cli/utils/__test__/copyDirectory.test.ts

import test from 'node:test'
import assert from 'node:assert/strict'
import fs from 'node:fs'

import fsMock from 'mock-fs'

import { copyDirectory } from '../copyDirectory.js'

await test('utils/copyDirectory', async (t) => {
  t.afterEach(() => {
    fsMock.restore()
  })

  await t.test('copy the files', async () => {
    fsMock({
      '/source': {
        'default.png': '',
        'index.ts': ''
      },
      '/destination': {}
    })

    let destinationDirectoryContent = await fs.promises.readdir('/destination')
    let sourceDirectoryContent = await fs.promises.readdir('/source')
    assert.strictEqual(destinationDirectoryContent.length, 0)
    assert.strictEqual(sourceDirectoryContent.length, 2)

    await copyDirectory('/source', '/destination')
    destinationDirectoryContent = await fs.promises.readdir('/destination')
    sourceDirectoryContent = await fs.promises.readdir('/source')
    assert.strictEqual(destinationDirectoryContent.length, 2)
    assert.strictEqual(sourceDirectoryContent.length, 2)
    assert.deepStrictEqual(destinationDirectoryContent, [
      'default.png',
      'index.ts'
    ])
    assert.deepStrictEqual(sourceDirectoryContent, ['default.png', 'index.ts'])
  })

  await t.test('copy the files and folders recursively', async () => {
    fsMock({
      '/source': {
        'random-folder': {
          'default.png': '',
          'second-random-folder': {
            'mycode.ts': ''
          }
        },
        'index.ts': ''
      },
      '/destination': {}
    })

    let destinationDirectoryContent = await fs.promises.readdir('/destination')
    let sourceDirectoryContent = await fs.promises.readdir('/source')
    let randomFolderContent = await fs.promises.readdir('/source/random-folder')
    let secondRandomFolderContent = await fs.promises.readdir(
      '/source/random-folder/second-random-folder'
    )
    assert.strictEqual(randomFolderContent.length, 2)
    assert.strictEqual(secondRandomFolderContent.length, 1)
    assert.strictEqual(destinationDirectoryContent.length, 0)
    assert.strictEqual(sourceDirectoryContent.length, 2)

    await copyDirectory('/source', '/destination')
    destinationDirectoryContent = await fs.promises.readdir('/destination')
    sourceDirectoryContent = await fs.promises.readdir('/source')
    randomFolderContent = await fs.promises.readdir(
      '/destination/random-folder'
    )
    secondRandomFolderContent = await fs.promises.readdir(
      '/destination/random-folder/second-random-folder'
    )
    assert.strictEqual(destinationDirectoryContent.length, 2)
    assert.strictEqual(sourceDirectoryContent.length, 2)
    assert.deepStrictEqual(destinationDirectoryContent, [
      'index.ts',
      'random-folder'
    ])
    assert.deepStrictEqual(sourceDirectoryContent, [
      'index.ts',
      'random-folder'
    ])
    assert.strictEqual(randomFolderContent.length, 2)
    assert.strictEqual(secondRandomFolderContent.length, 1)
    assert.deepStrictEqual(randomFolderContent, [
      'default.png',
      'second-random-folder'
    ])
    assert.deepStrictEqual(secondRandomFolderContent, ['mycode.ts'])
  })
})