D7163: KSqueezedTextLabel: Add several autotests

[Henrik F .]

rkflx added a dependent revision: D7164: KSqueezedTextLabel: Respect indent, 
margin and frame width.

REPOSITORY
  R236 KWidgetsAddons

REVISION DETAIL
  https://phabricator.kde.org/D7163

To: rkflx, #frameworks