node-fs-extra/lib/fs/__tests__/copyFile.test.js

'use strict'

const os = require('os')
const fs = require('fs')
const fse = require('../..')
const path = require('path')
const assert = require('assert')

/* eslint-env mocha */

// Only availible in Node 8.5+
if (typeof fs.copyFile === 'function') {
  describe('fs.copyFile', () => {
    let TEST_DIR

    beforeEach(done => {
      TEST_DIR = path.join(os.tmpdir(), 'fs-extra', 'fs-copyfile')
      fse.emptyDir(TEST_DIR, done)
    })

    afterEach(done => fse.remove(TEST_DIR, done))

    it('supports promises', () => {
      const src = path.join(TEST_DIR, 'init.txt')
      const dest = path.join(TEST_DIR, 'copy.txt')
      fse.writeFileSync(src, 'hello')
      return fse.copyFile(src, dest).then(() => {
        const data = fse.readFileSync(dest, 'utf8')
        assert.strictEqual(data, 'hello')
      })
    })
  })
}