autoprefixer/test/at-rule.test.js

let { parse } = require('postcss')
let { test } = require('uvu')
let { equal } = require('uvu/assert')

let AtRule = require('../lib/at-rule')

test('adds prefixes', () => {
  let keyframes = new AtRule('@keyframes', ['-moz-', '-ms-'])

  let css = parse('@-moz-keyframes b {} @-ms-keyframes a {} @keyframes a {}')
  keyframes.process(css.last)
  equal(
    css.toString(),
    '@-moz-keyframes b {} ' +
      '@-ms-keyframes a {} ' +
      '@-moz-keyframes a {} ' +
      '@keyframes a {}'
  )
})

test.run()