Verify if the element is positioned at the top of the screen using the Selenium JavaScript web driver

Currently utilizing the Selenium web driver from this link to test a website. My goal is to determine if my view is positioned at the top of the entire screen.

I have tried using both isDisplay() and getLocationInView, but they only provide absolute position or display information relative to the element and HTML page, not the actual view itself.

Experimented with execute() and eval() to execute JavaScript code to capture the window and evaluate its axis value, since Selenium operates in a real browser (Chrome).

For example:

...execute("window", function(error, result) { console.log(result) };
...execute("console.log(window)", function(error, result) { console.log(result) };
...execute("return window", function(error, result) { console.log(result) };

However, these statements returned null as the result.

Despite reading through the API documentation multiple times, I believe I may have overlooked a necessary function.

My initial idea was to trigger a JavaScript variable within the testing browser, run a brief function to obtain the axis value, and store it in a variable. But even accessing the window global variable proved to be a challenge.

*Note: The executeScript is no longer available in the version of Selenium I am using currently (latest version based on my package.json).

*Important reminder:

I am utilizing wd.js as the web driver link here

Answer №1

Alright, I finally uncovered the solution! It turned out to be a rather straightforward fix. The issue lay in the fact that `wd.js` always utilizes promise chains, making it impossible to output anything with just eval. Instead, an asserter needed to be added for it to work correctly.

browser.eval("window.pageYOffset")
      .should.eventually.equal('0')
      .nodeify(done);

If you're curious about the value of `window.pageYOffset`, you can manually trigger a failure to see it.

It took me a couple of days to grasp this concept. Hopefully, my experience can help save you some time as well.

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