Selenium Firefox Web Driver occasionally not finding an element - selenium

I am using the Selenium Firefox Web Driver to run automated NUnit tests and, seemingly at random, it is not able to locate a particular button.
The function it is using is this
driver.FindElement(By.Id("createUser")).Click();
I can't figure out a pattern to why it does and doesn't work at different times. Does anyone have any ideas as to what is going on or what a possible work around might be? I am not using dynamic ids, and I have
driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(15));
in place to cause it to wait up to 15 seconds for the page to fully render.

Related

use selenium driver for fetching multiple pages in parallel

Can you "get" multiple pages in parallel with chromedriver?
I am using Python, and as far as I understand selenium provides windowing API but does not allow opening a new window for a new driver.get() action. Trying to fetch a page while another is in process has proven problematic for me although I guess it might have been my wrong usage.
Currently I am opening a number of chromedriver sessions in parallel, which in turn results with X 5 times chrome processes open - This can get intimidating although it seems to work. I am just wandering now if calling driver.get(url) on an existing session (after a previous page was retrieved) might open extra tabs/windows in the "internal" chrome process and bloat memory?
You can open links in a new window using selenium by forcing a context click:
A couple suggestions:
https://stackoverflow.com/a/19152396/1387701
https://stackoverflow.com/a/45582818/1387701
You can then use the switch_to command to switch between these windows.
See more at https://www.browserstack.com/guide/how-to-switch-tabs-in-selenium-python

DOM Element Load Time Benchmarking

I'd like to benchmark my web application. Specifically I'd like to measure the load time of a particular DOM element.
I can use webdriver's wait for visible to measure how long a an element took to load and save the result somewhere. However I'd also like to measure concurrency and other factors.
Is there a standard way to do this?
While I love WebdriverIO, I would recommend using a tool other than it for benchmarking. WebdriverIO uses HTTP requests to send commands to Selenium, and because of that isn't the most performant thing. Your stats could be way off simply because the request from WebdriverIO to Selenium takes longer than usual.
I'd suggest using a tool a little "closer to the metal", possibly CasperJS

Selenium RC - t.replace is not a function

[edit for godman] I am working on a web based application, written in PHP. I am using Selenium RC to run tests on the webpages produced by this application, through a browser.
I just upgraded to Firefox 14, so I had to upgrade to Selenium RC 2.25.0.
Now I'm seeing this error when running a test with htmlSuite:
Command execution failure. Please search the user group at
https://groups.google.com/forum/#!forum/selenium-users for error
details from the log window. The error message is: t.replace is not a
function
The command executed is:
clickAndWait //a[text()='! selenium test customer']
As you can see, it's not doing anything too tricky - just clicking a link. The test runs fine in the IDE, it's just when run via RC that it's a problem.
Searching in the groups revealed only really old threads dating back to version 1 of selenium.
Any ideas anyone?
[edit] I've been running the test that has these problems several times a day for the last week - and it doesn't seem to fail like this every time. This looks like it's a random problem. Has anyone seen this happen before?
[edit after the bounty got me no answers] Another example of it failing is with:
clickAndWait css=a.edit_company
This same call works fine earlier in the same test, on the same page.
[edit] Now I'm seeing the same error with a completely separate command:
type id=Address1 Address1
Does anyone have any suggestions about this? Any way I can even debug what's going on (I don't see this in the IDE at all)
I am not terribly familiar with clickAndWait. I personally prefer clicking and then doing my own custom waiting.
Try just clicking and add a Thread.Sleep(5000), or something similar, and see if the error is a result of the click or the wait part.
If it is the wait part, then I have a different suggestion than if it is the click part.
I've seen similar issues across various platforms. It has always been somewhat random for me, so I don't use clickandWait. Generally is is much more reliable to do a plain click, and then wait for specific condition. You could do a waitforpageload, but that has also been unreliable for me so I prefer things like waitfortextpresent and waitforelementpresent.
Usually, this kind of error would occur if you are dealing with something that is not a string. Could you just make sure that you are dealing with strings only?
2 possibilities where it is arising from:-
When text() is executed -> it might be dealing with a non-string
a[expression] -> the expression(text() = '! selenium test customer') when evaluated to False/True might be the problem because if a is a Map/array, the corresponding key should be a string and not a bool, probably.
text()='! selenium test customer' -->> is it an assignment operation? if yes, make sure that text() returns a lvalue or a mutable object (based on the language you are using selenium rc with)

Web Consistency Testing & Selenium : is there any tool which we can integrate with selenium to perform Web consistency testing

Web Consistency Testing & Selenium : is there any tool which we can integrate with selenium to perform Web consistency testing
I can do this using Selenium but its scope is limited using getallButtons, getAllFields etc. but it does not fetch all Page elements and also it only fetches only buttons or labels not every GUI element which are actually causing problems
So is there any Web consistency tool which can(prefered) or can not be integrated with selenium?
Also please suggest any others ways you know to perform this without selenium or with selenium
Mogotest is the tool designed for this testing. It is commercial though.
http://webconsistencytesting.com/
Theoretically you can obtain all page elements with Web Driver using xpath search
List<WebElement> elements = driver.findElements(By.xpath("//*"));
But processing those elements is so slow that renders this method virtually useless. Assuming you would like to invoke WebDriver's getTagName(), getLocation() and getSize() methods on every element of the web page it would take average 10 seconds (measured for a page with 190 elements which is relatively small).
If time is important for you, you need to go for difficult method which is serializing DOM to JSON or XML using javascript (you can inject javascript with Web Driver) and then parsing it in whatever language you're using for writing your Selenium tests.

Selenium 2: getScreenshotAs() mixed up when running several tests in parallel

in a continuous integration build environment when running several Selenium tests in parallel (using Firefox driver) for different applications and each tests records its screenshots after every "action" (e.g. navigating to a page, submitting a form etc.) it seems like that whichever application window pops up that one gets on the top of the z-axis and will have the focus.
So using the method getScreenshotAs() from the Selenium API to record images results in mixed up screenshots sometimes showing one application and sometimes the other application.
Recording the HTML responses with getPageSource() on the other hand seems to work correctly using the Firefox driver instance "bound" to the test.
Is there any solution how to deal with the mixed up image screenshots? Is there a possibility how to ensure that getScreenshotAs() only consideres its own Firefox driver instance? Thanks for any hints!
Peter
I don't know what flavor of selenium you are using but here is a reference to the API that looks like it would fix your problem, but I have never tested it.
http://selenium.googlecode.com/svn/trunk/docs/api/dotnet/index.html
What that link shows is the IWrapDriver which according to the documentation Gets the IWebDriver used to find this element.
So from my understanding you could set your IWebDriver in your method and then wrapit with the IWrapDriver and then use that to reference for you getScreenShotAs();