QA:Testcase ibus compose

Description

This test case is to type compose characters in f29 or later

How to test

Install gnome-tweaks.rpm for GNOME desktop

• For GNOME3

1. Run gnome-control-center region and add an input method sources besides XKB sources to enable IBus for XKB sources.
2. Run gnome-tweaks and go to "Keyboard and mouse" -> "Compose key" and setup your compose key.
3. Focus on gnome-terminal and after enable an XKB source with Super-Space key, type a compose key, "^" and "a".

• For others

1. Make sure ibus is enabled.
2. Configure compose key in your desktop. XFCE4 does not have the setting and you might like to save your compose keys in $HOME/.Xkbmap file.
3. Run setxkbmap -query command,
4. Focus on gnome-terminal and after enable an XKB source with Super-Space key, type a compose key, "^" and "a".

Expected Results

• For GNOME3

1. N/A
2. N/A
3. IBus pre-edit shows "⎄" (U+2384), "^" and output "â".

• For others

1. N/A
2. N/A
3. Show "options" line
4. IBus pre-edit shows "⎄" (U+2384), "^" and output "â".