Codeception $I->see() action doesn't work with WebDriver - webdriver

Question

The same action works with PhpBrowser but as soon as I set WebDriver in acceptance.suite.yml it throws the following error :
[PHPUnit\Framework\Exception] Invalid argument supplied for foreach() at vendor/php-webdriver/webdriver/lib/Remote/RemoteWebDriver.php:240
I followed the documentation for setting up WebDriver with Selenium. Here is what my acceptance.suite.yml looks like:
actor: AcceptanceTester
modules:
enabled:
- WebDriver:
url: '{website url here}'
browser: chrome
- \Helper\Acceptance
step_decorators: ~
Here is my acceptance test file:
<?php
class FirstAcceptanceCest
{
public function _before(AcceptanceTester $I)
{
}
public function seeLoginInFrontPage(AcceptanceTester $I)
{
$I->amOnPage('/');
$I->see('Login');
}
}
Any help would be greatly appreciated.

Answer 1

Issufficient error handling in php-webdriver library again.
https://github.com/php-webdriver/php-webdriver/blob/1.13.1/lib/Remote/RemoteWebDriver.php#L228-L245
$raw_elements = $this->execute(
DriverCommand::FIND_ELEMENTS,
JsonWireCompat::getUsing($by, $this->isW3cCompliant)
);
if ($raw_elements === null) {
throw new UnknownErrorException('Unexpected server response to findElements command');
}
$elements = [];
foreach ($raw_elements as $raw_element) {
$elements[] = $this->newElement(JsonWireCompat::getElement($raw_element));
}
My debugging advice is to add
if (!is_array($raw_elements) && !is_object($raw_elements)) {
var_dump($raw_elements); die;
}
before foreach and see if the output helps to understand the root cause.