gatsby-plugin-zopfli/test/zopfli-plugin.test.js

Gatsby plugin for preparing zopfli-compressed versions of assets

const fs = require('fs')
const path = require('path')
const sinon = require('sinon')
const test = require('tap').test

const TEST_DIR = {
  'test.css': 'contents of a .css file',
  'test.html': 'contents of a .html file',
  'test.js': 'contents of a .js file'
}

const tested = require('../src/zopfli-plugin')

test('compress only default extensions', t => {
  const cwd = t.testdir(TEST_DIR)
  const args = { reporter: { info: sinon.fake() } }
  tested.onPostBuild(args, { cwd })
    .then(res => {
      t.ok(fs.existsSync(path.join(cwd, 'test.css.gz')))
      t.ok(fs.existsSync(path.join(cwd, 'test.js.gz')))
      t.notOk(fs.existsSync(path.join(cwd, 'test.html.gz')))
    })
    .catch(err => t.fail(err))
    .finally(() => t.end())
})

test('compress only single extension', t => {
  const cwd = t.testdir(TEST_DIR)
  const args = { reporter: { info: sinon.fake() } }
  tested.onPostBuild(args, { cwd, extensions: ['css'] })
    .then(res => {
      t.ok(fs.existsSync(path.join(cwd, 'test.css.gz')))
      t.notOk(fs.existsSync(path.join(cwd, 'test.js.gz')))
      t.notOk(fs.existsSync(path.join(cwd, 'test.html.gz')))
    })
    .catch(err => t.fail(err))
    .finally(() => t.end())
})

test('compress to another folder', t => {
  const cwd = t.testdir(TEST_DIR)
  const dir = 'zopfli'
  const args = { reporter: { info: sinon.fake() } }
  tested.onPostBuild(args, { cwd, path: dir })
    .then(res => {
      t.ok(fs.existsSync(path.join(cwd, dir, 'test.css.gz')))
    })
    .catch(err => t.fail(err))
    .finally(() => t.end())
})