Selenium: Firefox: logs().get( "browser" ) doesn't show console errors?

Created on 15 Oct 2015 · 14Comments · Source: SeleniumHQ/selenium

I'm trying to save the console logs after each test but having some problems with Firefox.
With a test like:

describe("protractor/webdriver", function() {
    it("should be able to get browser logs", function() {
        browser.get("https://angularjs.org");

        browser.executeScript("console.log('Nothing to see here - move along.')");
        browser.executeScript("console.warn('This is your first warning!')");
        browser.executeScript("console.error('This is serious!!!')");

        browser.driver.manage().logs().get( "browser" ).then(function( logsEntries ) {
            logsEntries.forEach( (item) => {
                console.log( "LOG LEVEL:", item.level.name, item.message );
            });
        });
    });
});

For Chrome I get the result nicely:

[chrome #1] LOG LEVEL: WARNING console-api 240:41 This is your first warning!
[chrome #1] LOG LEVEL: SEVERE console-api 240:41 This is serious!!!

But Firefox only returns "Internal" warnings (CSS parse):

[firefox #2] LOG LEVEL: WARNING Unknown property 'zoom'.  Declaration dropped.
[firefox #2] LOG LEVEL: WARNING Unknown property 'user-select'.  Declaration dropped.
[firefox #2] LOG LEVEL: WARNING Unknown property 'zoom'.  Declaration dropped.
[firefox #2] LOG LEVEL: WARNING Error in parsing value for 'background-image'.  Declaration dropped.
[firefox #2] LOG LEVEL: WARNING Error in parsing value for 'background-image'.  Declaration dropped.
[firefox #2] LOG LEVEL: WARNING Expected media feature name but found '-webkit-min-device-pixel-ratio'.

D-firefox I-enhancement

Source

axelssonHakan

👍9

Most helpful comment

I am having the same issue with selenium 2.53.1 and firefox 45.3ESR

sundeep-gupta on 16 Aug 2016

👍9

All 14 comments

The FirefoxDriver is not configured to capture JS console output.

jleyba on 15 Oct 2015

This issue can be resolved partially by installation of JSErrorCollector addon, but as far as I know it can catch only errors (not warnings).

I hope to see this functional in future version of Selenium. :smiley:

Unnumbered on 27 Nov 2015

Sounds interesting :)
Where can I find this add-on?

axelssonHakan on 27 Nov 2015

@axelssonHakan first search result on Google and GitHub.
https://github.com/mguillem/JSErrorCollector

Unnumbered on 27 Nov 2015

I am experiencing the same issue. My environment is Ubuntu 14.04 LTS, Firefox 42, Selenium Version 2.48.0.

Here is my test html page:

<!DOCTYPE HTML>
<html>
<head>
        <script> console.log('console log'); </script>
</head>
<body></body>
</html>

and my test python script

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
import time

d = DesiredCapabilities.FIREFOX
d['loggingPrefs'] = { 'browser':'ALL' }
driver = webdriver.Firefox(capabilities=d)

# chrome
# d = DesiredCapabilities.CHROME
# d['loggingPrefs'] = { 'browser':'ALL' }
# driver = webdriver.Chrome(desired_capabilities=d)

driver.get('http://localhost:8000/consolelog.html')
time.sleep(2) # time for page to load
logs = driver.get_log('browser')
messages = map(lambda l: l['message'], logs)
has_console_logs = any(map(lambda m: m.find('console log') >= 0, messages))
print('Success' if has_console_logs else 'Failure')
driver.quit()

When the chrome driver is used the console log message is found in the list of browser messages (has_console_log is True). When Firefox driver is used driver.get_log('browser') returns a lot of stuff mostly browser debugging info. However the console log message is not found.

svetlin-mladenov on 4 Dec 2015

Same issue in my case, with the same versions. Still looking for a solution, even a workaround, since having the console after the tests have run is very precious for analysis of failures. I'm using Firefox because I have to support different OS and this was the easiest to support.

dcoraboeuf on 8 Dec 2015

👍4

Any update on this?

shaharmor on 24 May 2016

Is there any update regarding to this issue?

malafeev01 on 15 Jun 2016

I am having the same issue with selenium 2.53.1 and firefox 45.3ESR

sundeep-gupta on 16 Aug 2016

👍9

+1 for this.

nickrnet on 28 Oct 2016

can somehow outpass this?... any chance with using geckodriver?

iszlailorand on 31 Mar 2017

Same problem with GeckoDriver 0.16.1, FF-53.0.3, Selenium 3.4.0
*WebDriver.Manage().Logs.GetLog(LogType.Browser) Exception:*
System.NullReferenceException: Object reference not set to an instance of an object.
at OpenQA.Selenium.Remote.HttpCommandExecutor.Execute(Command commandToExecute)
at OpenQA.Selenium.Remote.DriverServiceCommandExecutor.Execute(Command commandToExecute)
at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
at OpenQA.Selenium.Remote.RemoteLogs.GetLog(String logKind)