php Codeception not-so-quick start: [PHPUnit\Framework\Exception] Undefined index: ELEMENT

Question

So, I followed the Codeception Quick Start instructions faithfully. I run the first example test using the PhpBrowser...

# Codeception Test Suite Configuration
#
# [further comments omitted]
# 
actor: AcceptanceTester
modules:
    enabled:
        - PhpBrowser:
            url: 'http://office.localhost/'
            browser: 'firefox'
        - \Helper\Acceptance

and the test:

<?php

class FirstCest
{               
    public function frontpageWorks(AcceptanceTester $I)
    {
        $I->amOnPage('/');
        $I->see('We hope you enjoy it');

    }
}

and all is well.

Then I change the configuration to this:

actor: AcceptanceTester
modules:
    enabled:
        - WebDriver:
            url: 'http://office.localhost/'
            browser: 'firefox'
        - \Helper\Acceptance

per the instructions, and I have Selenium installed and up and running, and away we go...

1) FirstCest: Frontpage works
 Test  tests/acceptance/FirstCest.php:frontpageWorks

  [PHPUnit\Framework\Exception] Undefined index: ELEMENT  


Scenario Steps:

 2. $I->see("InterpretersOffice") at tests/acceptance/FirstCest.php:22
 1. $I->amOnPage("/") at tests/acceptance/FirstCest.php:21

#1  /opt/www/court-interpreters-office/vendor/facebook/webdriver/lib/Remote/RemoteWebDriver.php:198
#2  Codeception\Module\WebDriver->see
#3  /opt/www/court-interpreters-office/tests/_support/_generated/AcceptanceTesterActions.php:363
#4  /opt/www/court-interpreters-office/tests/acceptance/FirstCest.php:22
#5  FirstCest->frontpageWorks

Selenium is driving Firefox, the page is loaded, the content that $I want to see() is there, so that ain't the problem. I have poked around in the source a bit, but haven't figured this out. I have tried changing $I->see() to $I->seeInSource() and found that does work, FWIW.

Any thoughts?

It looks like current version of Firefox is incompatible with facebook/webdriver because facebook/webdriver hasn't implemented the new protocol yet. — Naktibalda
– Naktibalda, Commented Oct 24, 2017 at 15:16
Error you got is directly caused by insufficient error handling in facebook/webdriver code: github.com/facebook/php-webdriver/blob/1.4.1/lib/Remote/… You are welcome to do some debugging and see what is actually happening there. — Naktibalda
– Naktibalda, Commented Oct 24, 2017 at 15:17
phptest.club/t/does-anyone-set-up-selenium-3-and-codeception/… seems to suggest that "just use Chrome instead of Firefox" is the only available solution at the moment. FYI I did do some debugging, examined what was happening at github.com/facebook/php-webdriver/blob/1.4.1/lib/Remote/…, and -- no surprise --index 'ELEMENT' is indeed undefined. — David
– David, Commented Oct 24, 2017 at 17:05

Josh Kelley · Accepted Answer · 2018-03-22 21:02:07Z

4

The problem is apparently that Facebook's php-webdriver isn't compatible with current Firefox.

These threads discuss the issue in more detail, and php-webdriver issue #469 tracks adding full W3C WebDriver support (which will fix the incompatibility).

A workaround is to add the -enablePassthrough false argument when launching Selenium. For example:

java -Dwebdriver.gecko.driver=./geckodriver -jar selenium-server-standalone-3.8.1.jar -enablePassThrough false

Unfortunately, Selenium removed support for pass through mode in 3.9, so you'll have to use an older version.

Another workaround is to switch to Chrome.

edited Mar 22, 2018 at 21:02

answered Jan 16, 2018 at 20:29

Josh Kelley

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2 Comments

Shad Over a year ago

I tried this: java -jar selenium-server-standalone-3.11.0.jar -enablePassThrough false and got this error. Any other alternatives?

Josh Kelley Over a year ago

@Shad - Unfortunately, it looks like -enablePassThrough was removed in Selenium 3.9. See github.com/SeleniumHQ/selenium/blob/master/java/CHANGELOG.

Hermann Schwarz · Accepted Answer · 2018-09-12 12:23:56Z

0

In my case the only solution was:

Install chromedriver in a path that is in $PATH (/usr/bin or /bin)

and using in your test class:

$capabilities = DesiredCapabilities::chrome()

It works with executing Selenium standard way:

 java -jar selenium-server-standalone-3.14.0.jar

answered Sep 12, 2018 at 12:23

Hermann Schwarz

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Comments

Sean Chen · Accepted Answer · 2019-08-29 14:22:19Z

0

There are different situations on my Ubuntu ver. 18.x:

The vendor files has been for years, I have to rm the vendor fold and rebuild it with php composer.phar require facebook/webdriver for my PHP library.
The version of selenium-server-standalone-x.jar and chromedriver doesn't match. So download more version and try, finally you will get one pair to work.

answered Aug 29, 2019 at 14:22

Sean Chen

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