text: const series = require('../')
  const test = require('tape')
  
  test('no callback', function (t) {
    t.plan(2)
  
    const tasks = [
      function (cb) {
        t.pass('cb 1')
        cb(null)
      },
      function (cb) {
        t.pass('cb 2')
        cb(null)
      }
    ]
  
    series(tasks)
  })
  