Selenium/How-to/Make the browser visible or hidden

Follow the instructions located at Run tests targeting MediaWiki-Docker. For information on which environments support a visible browser, see the Selenium/Reference/Running tests page.

Browser visibility in Docker is controlled by the DISPLAY environment variable. This variable is by default not set on macOS. It is by default set on Ubuntu Linux.

Visible

To make the browser visible, make sure the DISPLAY environment variable is set to any value.

export DISPLAY=1

Hidden

To make the browser hidden, make sure the DISPLAY environment variable is not set.

unset DISPLAY

Run Selenium tests

npm run selenium-test

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