Selecting a radio button with value "0" is not possible if another element is pre-selected

[NicoHaase]

In a form in my project, a form holds two radio buttons for the field transfer with values 0 and 1. When the button with value 1 is pre-selected, I cannot change that. $form['transfer']->setValue('0'); does nothing, as Symfony\Component\Panther\WebDriver\WebDriverCheckbox::getRelatedElements does not yield any field selector when $value = '0'

I could get this working when modifing the first line of that method from

$valueSelector = $value ? sprintf(' and @value = %s', XPathEscaper::escapeQuotes($value)) : '';

to

$valueSelector = !is_null($value) ? sprintf(' and @value = %s', XPathEscaper::escapeQuotes($value)) : '';

[WubbleWobble]

Bizarre - I've just chased down this exact same issue, and here it is top of the list :)

All I have to add is that it doesn't matter about pre-selected values. On a completely fresh form this bug also prevents me from selecting a checkbox/radio with a non-truthy value.

I had a ChoiceType form with two radios - {"Yes": "1", "No": "0"} - and trying to submit the form via Panther with {"confirm": "0"} ended up with it selecting "Yes" :D

(A workaround for my issue was to change my form to use the "choice_value" option to alter the strings that were being outputted on the HTML side whilst not changing the data values that the form returned via getData())