Testing Instructions: Log in as admin Navigate to the template library: Site administration > Development > Template library Select the "core/columns-1to1to1" template from the list of templates Expected results: The template renders in the example section. The rendered example should have three columns of equal widths. If the browser's width is reduced just like that of a mobile device's screen width, the second column collapses underneath the first and the third column collapses underneath the second. The documentation should be rendered underneath the example. The example context should be correctly rendered in the template. RTL-compatibility Change the site's language to an RTL one. Go to the templates library page and select the "core/columns-1to1to1" template from the list of templates. Expected result The first column should be seen on the right, while the second column should be on the middle and the third column on the left. Others Test the template on base theme and LTR/RTL languages. The example template should be also displayed and behave in a similar fashion as mentioned above.