patch 8.2.3526: tests have clumsy check for X11 based GUI Commit: https://github.com/vim/vim/commit/40bd5a15405206b130d487af0ca61b5d9b5859f8 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 16 21:58:27 2021 +0100 patch 8.2.3526: tests have clumsy check for X11 based GUI Problem: Tests have clumsy check for X11 based GUI. Solution: Add CheckX11BasedGui.

#!/bin/bash
set -e

apt-get install -y xvfb

cat <<EOT >/etc/systemd/system/xvfb.service
[Unit]
Description=X Virtual Frame Buffer Service
After=network.target
[Service]
ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24
[Install]
WantedBy=multi-user.target
EOT

systemctl enable xvfb.service
systemctl start xvfb.service