Merge pull request #4656 from stapelberg/flaky

Fix flaky tests: sync after kill

testcases/lib/i3test.pm.in

@@ -972,6 +972,8 @@ sub kill_all_windows {
     # Sync in case not all windows are managed by i3 just yet.
     sync_with_i3;
     cmd '[title=".*"] kill';
+    # Sync to make sure x_window_kill() calls have taken effect.
+    sync_with_i3;
 }
 
 =head2 events_for($subscribecb, [ $rettype ], [ $eventcbs ])

testcases/t/219-ipc-window-focus.t

@@ -56,7 +56,11 @@ sub kill_subtest {
     my $focus = AnyEvent->condvar;
 
     my @events = events_for(
-	sub { cmd $cmd },
+	sub {
+	    cmd $cmd;
+	    # Sync to make sure x_window_kill() calls have taken effect.
+	    sync_with_i3;
+	},
 	'window');
 
     is(scalar @events, 1, 'Received 1 event');