metaltest/index.js

const noreporter = {
  start: (title) => { },
  before: () => { },
  success: (test) => { },
  fail: (test, e) => { },
  after: () => { },
  end: (stats) => { },
}

const metaltest = (title) => {
  const suite = []
  const only = []
  const before = []
  const after = []

  let success = 0
  let fail = 0
  const testSuccess = []
  const testFail = []

  const runner = (name, fn) => {
    suite.push({ name, fn })
  }

  runner.only = (name, fn) => { only.push({ name, fn }) }
  runner.before = (fn) => { before.push(fn) }
  runner.after = (fn) => { after.push(fn) }

  runner.run = async (...reporters) => {
    const rs = reporters.map(r => Object.assign({}, noreporter, r))

    rs.forEach(r => r.start(title))
    rs.forEach(r => r.before())

    const tests = only.length ? only : suite
    for (const test of tests) {
      try {
        for (const fn of before) await fn()
        await test.fn()
        success++
        rs.forEach(r => r.success(test))
      }
      catch (e) {
        fail++
        testFail.push(Object.assign({}, test, { error: e }))
        rs.forEach(r => r.fail(test, e))
      }
    }

    for (const fn of after) await fn()

    rs.forEach(r => r.after())

    const stats = { title, success, fail, total: success + fail, testSuccess, testFail }

    rs.forEach(r => r.end(stats))

    return stats
  }

  return runner
}

export * from './reporter/index.js'
export { runifmain } from './runifmain.js'
export { suite } from './suite.js'
export { metaltest }
export default metaltest