Added seeFormHasErrors function

[TavoNiievez]

It is also present in the Laravel Module,

Check for errors after submitting a form.

[Naktibalda]

I can't find any documentation of form collector. Is it documented at all?

[TavoNiievez]

It has no page on symfony.com and it is referenced very little (even on stackoverflow), that made it difficult to write these functions...

 // Symfony\Component\Form\Extension\DataCollector\FormDataCollectorInterface.php

 /**
 * Returns all collected data.
 *
 * @return array|Data
 */
 public function getData();

But i debugged the 'Data' object deeply until i found the info i needed. there are no other objects in it, only arrays.

[TavoNiievez]

I verified that those keys were the correct ones, doing a bit of reverse engineering here.

Edit: See also [1] [2] .