Zend PHPUnit check elements set by controller

When testing output from controllers in Zend using the Zend PHPUnit one might want to check the elements set by the controller, if they have the right values or exist at all.

Anything below top level form ($this->view->form = $form; in controller) one needs to use the getElement() function like one would in the controller. getSubForm() is also valid if there are subforms:

public function testRegisterViewObjectContainsProperties() {
$controller = new RegistrationController(
$this->request,
$this->response,
$this->request->getParams()
);
$controller->registerAction();

$this->assertTrue(isset($controller->view->form));

$this->assertTrue(isset($controller->view));
$this->assertTrue(isset($controller->view->form));
$username = $controller->view->form->getSubForm('userpass')->getElement('username');

http://www.contentwithstyle.co.uk/content/unit-testing-controllers-with-zend-framework seems to be useful.

Zend PHPUnit posting to controller

Sending data to the controller to check what you get back can be tricky. Especially if you have subforms or file uploads.

Here is how if you have subforms (in this case a select and a multiselect in separate subforms):
public function testPostMissingFilledFields() {
$this ->request ->setMethod('POST')
->setPost(array(
//Selected element with value '2'
'firstLayerSubform1' =>
array('secondLayerSubform1' =>
array('thirdLayerSubform1' =>
array('select' => array('2')))),
//Selected elements with values 1159 and 1161
'firstLayerSubform2' =>
array('secondLayerSubform2' =>
array('thirdLayerSubform2' =>
array('multiselect' => array('1159', '1161')))),
));

Useful functions to see what you submit look like are:
In Test file:
var_dump($this->request->getParams());
In controller:
var_dump($this->_request->getParams());

If you find a way to check for uploaded files please tell me. :)

PHPUnit with Zend View

When you want to check if important objects in Zend Views show up using PHPUnit testing can be used. In my case I have a registration form which repopulated the fields if one was missing or if anything was incorrectly filled in.

There seem to be multiple ways to select elements in the DOM:
- assertQuery - CSS selector
- assertXpath - Xpath selector
- strpos (!) - search through the html as a string

I first tried CSS selector:
$this->assertQuery('input[id="username"][value="test1"]'); //username
$this->assertQuery('input#username[value="test1"]'); //username
$this->assertQuery("input[value='test@asdf.com']"); //emailaddress

All should work, but there are different problems. The two first selections don't work, event though they work in firebug. The last line doesnt work either because of the period '.' which gives a "DOMXPath::query(): Invalid predicate" error.
Seems Zend PHPUnit converts from CSS to Xpath selectors and doesnt manage to do it right.

Therefore using Xpath directly is better. (Download the FireXpath extension to Firebug for Firefox and play around to learn it (also http://www.w3schools.com/XPath/default.asp is good)). So here's Xpath:
$this->assertXpath("//input[@id='username'][@value='test1']"); //username
$this->assertXpath("//input[@id='emailaddress'][@value='test@asdf.com']"); //emailaddress
Works out of the box.

Alternatively you can search through the html code linearly:
$this->assertTrue(strpos($this->_response->getBody(), 'test@asdf.com') !== false); //emailaddress
However, if anything changes in the html code, the test might fail.

Solution sources: http://framework.zend.com/manual/en/zend.test.phpunit.html, http://www.tig12.net/downloads/apidocs/zf/, others I cant remember.