running ordered async tests

test.js

tests = []
running = false

done = function() {
  test = tests.shift()
  if (test) test(done)
}

const it = function(name, test) {
  tests.push(test)
  if (!running) {
    running = true
    done()
  }
}


// test file

it('will run first', function(done) {
  setTimeout(function() {
    console.log('ok1')
    done()
  }, 1000);
})


it('will start after test1 is done', function(done) {
  console.log('ok2')
  done()
})