# Let and Let Go¶

If you need to pass the object into the constructor instead of a method then you can do it like this:

<?php

namespace spec;

use PhpSpec\ObjectBehavior;
use Markdown\Writer;

class MarkdownSpec extends ObjectBehavior
{
function it_outputs_converted_text(Writer $writer) {$this->beConstructedWith($writer);$writer->writeText("<p>Hi, there</p>")->shouldBeCalled();

$this->outputHtml("Hi, there"); } }  If you have many examples then writing this in each example will get tiresome. You can instead move this to a let method. The let method gets run before each example so each time the parser gets constructed with a fresh mock object. <?php namespace spec; use PhpSpec\ObjectBehavior; use Markdown\Writer; class MarkdownSpec extends ObjectBehavior { function let(Writer$writer)
{
$this->beConstructedWith($writer);
}
}


There is also a letGo method which runs after each example if you need to clean up after the examples.

It looks like you will now have difficulty getting hold of the instance of the mock object in the examples. This is easier to deal with than it looks though. Providing you use the same variable name for both, phpspec will inject the same instance into the let method and the example. The following will work:

<?php

namespace spec;

use PhpSpec\ObjectBehavior;
use Markdown\Writer;

class MarkdownSpec extends ObjectBehavior
{
function let(Writer $writer) {$this->beConstructedWith($writer); } function it_outputs_converted_text($writer)
{
$writer->writeText("<p>Hi, there</p>")->shouldBeCalled();$this->outputHtml("Hi, there");
}
}