Merge with JSErrorCollector?

[mguillem]

Not an issue, just an idea.

I'm the author of JSErrorCollector. Would you be interested to merge ChromeJSErrorCollector into JSErrorCollector? We could then give a unified API to WebDriver users to track JS errors in FF and Chrome (and who knows, later in other browsers?). Would this make sense to you?

[dharrya]

Yes, i think it will be great! Honest, I specifically did receive errors from the WebDriver compatible with yours;-) You think the using of browser extensions for track JS errors still actual? I mean, that JsonWiredProtocol have native support for obtaining the log: https://code.google.com/p/selenium/wiki/JsonWireProtocol#/session/:sessionId/log For example, Python code (since 2.34):

from selenium import webdriver

driver = webdriver.Chrome()
driver.get('http://stuff-dharrya.rhcloud.com/get_external_js_error')
driver.get('http://stuff-dharrya.rhcloud.com/get_js_error')
print(driver.get_log('browser'))
driver.quit()

Will output:

$./sample.py 
[{u'timestamp': 1377549098775, u'message': u'http://pocs-dharrya.rhcloud.com/external.js 1 Uncaught ReferenceError: foo is not defined', u'level': u'SEVERE'}, {u'timestamp': 1377549099244, u'message': u'http://stuff-dharrya.rhcloud.com/get_js_error 9 Uncaught ReferenceError: someVariable is not defined', u'level': u'SEVERE'}]

And Java:

package org.selenium.chrome_debugger;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.logging.LogEntry;
import org.openqa.selenium.logging.Logs;

import java.util.List;

public class SeleniumTest {

    public static void main(String[] args) {
        final WebDriver driver = new ChromeDriver();
        driver.get("http://stuff-dharrya.rhcloud.com/get_external_js_error");
        driver.get("http://stuff-dharrya.rhcloud.com/get_js_error");
        Logs log = driver.manage().logs();
        List<LogEntry> logsEntries = log.get("browser").getAll();
        for (LogEntry entry: logsEntries) {
            System.out.println(entry.getMessage());
        }
        driver.quit();
    }
}

Output:

Starting ChromeDriver (v2.2) on port 26315
http://pocs-dharrya.rhcloud.com/external.js 1 Uncaught ReferenceError: foo is not defined
http://stuff-dharrya.rhcloud.com/get_js_error 9 Uncaught ReferenceError: someVariable is not defined

And phpunit-selenium (i'm waiting for merge with my pull request Added command session::log() and session::logTypes()):

<?php
class WebTest
    extends PHPUnit_Extensions_Selenium2TestCase
{
    protected function setUp()
    {
        $this->setBrowser('chrome');
        $this->setBrowserUrl('http://stuff-dharrya.rhcloud.com');
    }

    public function testTitle()
    {
        $this->url('/get_external_js_error');
        $this->url('/get_js_error');
        print_r($this->log('browser'));
    }
}

Output:

$ phpunit test.php
PHPUnit 3.8-g5514f28 by Sebastian Bergmann.

Configuration read from /home/dharrya/work/bitrix/php-omut/phpunit.xml

.Array
(
    [0] => Array
        (
            [message] => http://pocs-dharrya.rhcloud.com/external.js 1 Uncaught ReferenceError: foo is not defined
            [timestamp] => 1377549974941
            [level] => SEVERE
        )

    [1] => Array
        (
            [message] => http://stuff-dharrya.rhcloud.com/get_js_error 9 Uncaught ReferenceError: someVariable is not defined
            [timestamp] => 1377549975282
            [level] => SEVERE
        )

)

Time: 2.81 seconds, Memory: 3.75Mb

OK (1 test, 0 assertions)

I'm not sure about .NET bindings, but I think it's a matter of time.

[mguillem]

I didn't know that logging was that far now. Indeed it seems that rather than a browser specific extension, parsing the log (what would be probably browser specific) to extract the JS errors would be enough.

[dharrya]

You are right, the logs is specific to each browser, but the differences are minor. For example:

package org.selenium.chrome_debugger;

import com.opera.core.systems.OperaDriver;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.logging.LogEntry;
import org.openqa.selenium.logging.Logs;

import java.util.List;

public class SeleniumTest {

    public static void main(String[] args) {
        testLogs(new FirefoxDriver(), "browser", "SEVERE");
        testLogs(new ChromeDriver(), "browser", "SEVERE");
        testLogs(new OperaDriver(), "ecmascript", "WARNING");
    }

    private static void testLogs(final WebDriver driver, final String logType, final String level) {
        System.out.println(driver.getClass().toString() + ":");
        driver.get("http://stuff-dharrya.rhcloud.com/get_external_js_error");
        driver.get("http://stuff-dharrya.rhcloud.com/get_js_error");
        Logs log = driver.manage().logs();
        List<LogEntry> logsEntries = log.get(logType).getAll();
        for (LogEntry entry: logsEntries) {
            if (entry.getLevel().toString().equals(level))
                System.out.println(entry.getMessage());
        }
        System.out.println();
        driver.quit();
    }
}

Will output:

class org.openqa.selenium.firefox.FirefoxDriver:
ReferenceError: foo is not defined
ReferenceError: someVariable is not defined

Starting ChromeDriver (v2.2) on port 30238
class org.openqa.selenium.chrome.ChromeDriver:
http://pocs-dharrya.rhcloud.com/external.js 1 Uncaught ReferenceError: foo is not defined
http://stuff-dharrya.rhcloud.com/get_js_error 9 Uncaught ReferenceError: someVariable is not defined

class com.opera.core.systems.OperaDriver:
Uncaught exception: ReferenceError: Undefined variable: foo

Error thrown at line 1, column 0 in http://pocs-dharrya.rhcloud.com/external.js:
    window.notExisting = foo();

Uncaught exception: ReferenceError: Undefined variable: someVariable

Error thrown at line 9, column 1 in http://stuff-dharrya.rhcloud.com/get_js_error:
    someVariable

Maybe better way - write cross-browser helpers for work with this logs?

[mguillem]

Probably. But they need to be cross languages too: I'm interested in Java and you seem to be interested by different languages.

[Paul-Oginni]

@dharrya,

Thank you so much dharrya. Your PHP code really helped out!

And thanks @mguillem for developing this useful extension.

[PurpleCatfish]

Hello All,

I have used your extension to extend https://github.com/grinslife/JSErrorCollector.NET I have got your source code and put into that project. (without extension)

Thanks to @mguillem ; @dharrya and @protectedtrust In case you decided to merge Firefox and Chrome JS code, it would be grait.

P.S. Plan to add Chrome support to @mguillem source code.

[PurpleCatfish]

@dharrya In the C# fork there is no such ability to get chrome get log