text: <?php
  
  namespace spec\Prophecy\Promise;
  
  use PhpSpec\ObjectBehavior;
  use Prophecy\Prophecy\MethodProphecy;
  use Prophecy\Prophecy\ObjectProphecy;
  
  class ReturnArgumentPromiseSpec extends ObjectBehavior
  {
      function it_is_promise()
      {
          $this->shouldBeAnInstanceOf('Prophecy\Promise\PromiseInterface');
      }
  
      function it_should_return_first_argument_if_provided(ObjectProphecy $object, MethodProphecy $method)
      {
          $this->execute(array('one', 'two'), $object, $method)->shouldReturn('one');
      }
  
      function it_should_return_null_if_no_arguments_provided(ObjectProphecy $object, MethodProphecy $method)
      {
          $this->execute(array(), $object, $method)->shouldReturn(null);
      }
  
      function it_should_return_nth_argument_if_provided(ObjectProphecy $object, MethodProphecy $method)
      {
          $this->beConstructedWith(1);
          $this->execute(array('one', 'two'), $object, $method)->shouldReturn('two');
      }
  }
  