How to specify screen resolution?

[avilano]

I can't find a way to change the screen resolution for the ubuntu image in order to run browser tests.

[FelicianoTech]

This depends on the tools you are using. Different tools have different ways to go about things. Since this is a server image, there's no real screen or monitor but you can change the virtualized window size. For example, if you were using Selenium (pre-installed) and Firefox, this Doc shows the setting you'd want to change: https://www.selenium.dev/selenium/docs/api/javascript/module/selenium-webdriver/firefox_exports_Options.html#windowSize

[avilano]

Thank you, I'm using Testcafe which uses this method (https://testcafe.io/documentation/402696/reference/test-api/testcontroller/maximizewindow#header) in combination with the cimg-node, google chorme and browser-tools. I am getting this warning when tests finish.

Warnings (1):
 --
  Was unable to maximize the window due to an error.

  The
  /home/circleci/bold/qa/node_modules/testcafe-browser-tools/bin/linux/glibc-64/maximize
  process failed with the null exit code.

Here is the job config:

<job-name>:
    working_directory: <some-path>
    docker:
      - image: cimg/node:lts-browsers
    resource_class: medium+
    steps:
      - checkout:
          path: <some-path>
      - browser-tools/install-chrome
      - browser-tools/install-chromedriver
      - node/install-packages
      - run:

[BytesGuy]

@avilano I can only presume that this is an issue with testcafe at this point. I don't have any experience with it, but with selenium running driver.manage().window().setRect({width: 3840, height: 2160, x: 0, y: 0}); for example works perfectly fine.

Here is a screenshot from the test running in CircleCI using cimg/node:lts-browsers:

[BytesGuy]

I'm going to close this issue as it doesn't appear to be directly tied to the image as I was able to set the window size as above. Please feel free to reopen this if required.