How to click on a link in a modal window in a codeception test?

Question

PHP

There is a link on the page:

<a href="" class="confirm"><i class="fa fa-times"></i></a>

By clicking on it, a modal window appears in which:

<div class="modal-footer"><button class="confirm btn btn-flat success" type="button" data-dismiss="modal">Да, уверен</button><button class="cancel btn btn-flat danger" type="button" data-dismiss="modal">Нет, передумал</button></div>

I need to click on the first button, how to do it?
Tried options:

$I->click(Locator::firstElement('//modal-footer/button'));
$I->click('.modal-footer .success');

Doesn't help, test fails. In the second case, since

[Facebook\WebDriver\Exception\ElementNotVisibleException] element not visible

In the first

Fail Link or Button or CSS or XPath element with '(//modal-footer/button)[position()=1]' was not found.

Answer 1

In the first option, it does not find the element, in the second it is still invisible, set wait or waitForElement before clicking on the modal window