tailwindcss/tests/util/run.js

import path from 'path'
import postcss from 'postcss'
import tailwind from '../../src'
import { env } from '../../src/lib/sharedState'

export * from './strings'
export * from './defaults'

export let map = JSON.stringify({
  version: 3,
  file: null,
  sources: [],
  names: [],
  mappings: '',
})

export function run(input, config, plugin = tailwind) {
  let { currentTestName } = expect.getState()

  return postcss(plugin(config)).process(input, {
    from: `${path.resolve(__filename)}?test=${currentTestName}`,
  })
}

export function runWithSourceMaps(input, config, plugin = tailwind) {
  let { currentTestName } = expect.getState()

  return postcss(plugin(config)).process(input, {
    from: `${path.resolve(__filename)}?test=${currentTestName}`,
    map: {
      prev: map,
    },
  })
}

let nullTest = Object.assign(function () {}, {
  skip: () => {},
  only: () => {},
  each: () => () => {},
  todo: () => {},
})
let nullProxy = new Proxy(
  {
    test: nullTest,
    it: nullTest,
    xit: nullTest.skip,
    fit: nullTest.only,
    xdescribe: nullTest.skip,
    fdescribe: nullTest.only,
  },
  {
    get(target, prop, _receiver) {
      if (prop in target) {
        return target[prop]
      }
      return Object.assign(() => {
        return nullProxy
      }, nullProxy)
    },
  }
)

/**
 * @typedef {object} CrossCheck
 * @property {typeof import('@jest/globals')} oxide
 * @property {typeof import('@jest/globals')} stable
 * @property {object} engine
 * @property {boolean} engine.oxide
 * @property {boolean} engine.stable
 */

/**
 * @param {(data: CrossCheck) => void} fn
 */
export function crosscheck(fn) {
  let engines =
    env.ENGINE === 'oxide' ? [{ engine: 'Stable' }, { engine: 'Oxide' }] : [{ engine: 'Stable' }]

  describe.each(engines)('$engine', ({ engine }) => {
    let engines = {
      oxide: engine === 'Oxide' ? globalThis : nullProxy,
      stable: engine === 'Stable' ? globalThis : nullProxy,
      engine: { oxide: engine === 'Oxide', stable: engine === 'Stable' },
    }

    beforeEach(() => {
      env.OXIDE = engines.engine.oxide
    })

    fn(engines)
  })
}