text: var tape = require('tape')
  var iterate = require('./')
  
  tape('iterates all', function (t) {
    var ite = iterate([1, 2, 3, 4, 5, 6, 7, 8, 9])
    var found = {}
  
    for (var i = 0; i < 9; i++) {
      var j = ite()
      t.ok(!!j, 'not null')
      if (found[j]) t.ok(false, 'duplicate')
      found[j] = true
    }
  
    t.ok(!ite(), 'no more')
    t.end()
  })
  