tests, stacking: Add tests with no-input and no-take-focus windows

When a window with no frame, that doesn't accept focus and that has no take-focus
atom set is destroyed, we end up in not changing the current_focus window, causing
a crash.

Added test cases that verify this situation (expected to fail).

See #308

src/Makefile-tests.am

@@ -15,6 +15,9 @@ dist_stacking_DATA =						\
 	$(srcdir)/tests/stacking/basic-x11.metatest 	\
 	$(srcdir)/tests/stacking/basic-wayland.metatest	\
 	$(srcdir)/tests/stacking/closed-transient.metatest	\
+	$(srcdir)/tests/stacking/closed-transient-no-input-no-take-focus-parent.metatest \
+	$(srcdir)/tests/stacking/closed-transient-no-input-no-take-focus-parents.metatest \
+	$(srcdir)/tests/stacking/closed-transient-no-input-parent.metatest \
 	$(srcdir)/tests/stacking/minimized.metatest 	\
 	$(srcdir)/tests/stacking/mixed-windows.metatest     \
 	$(srcdir)/tests/stacking/set-parent.metatest	\

src/tests/meson.build

@@ -87,6 +87,9 @@ stacking_tests = files([
   'stacking/basic-wayland.metatest',
   'stacking/client-side-decorated.metatest',
   'stacking/closed-transient.metatest',
+  'stacking/closed-transient-no-input-no-take-focus-parent.metatest',
+  'stacking/closed-transient-no-input-no-take-focus-parents.metatest',
+  'stacking/closed-transient-no-input-parent.metatest',
   'stacking/minimized.metatest',
   'stacking/mixed-windows.metatest',
   'stacking/set-parent.metatest',

src/tests/stacking/closed-transient-no-input-no-take-focus-parent.metatest

@@ -0,0 +1,23 @@
+new_client 1 x11
+create 1/1
+show 1/1
+wait
+
+create 1/2 csd
+set_parent 1/2 1
+take_focus 1/2 false
+accept_focus 1/2 false
+show 1/2
+wait
+
+create 1/3 csd
+set_parent 1/3 2
+show 1/3
+wait
+
+assert_stacking 1/1 1/2 1/3
+
+destroy 1/3
+wait
+
+assert_stacking 1/1 1/2

src/tests/stacking/closed-transient-no-input-no-take-focus-parents.metatest

@@ -0,0 +1,25 @@
+new_client 1 x11
+create 1/1
+accept_focus 1/1 false
+take_focus 1/1 false
+show 1/1
+wait
+
+create 1/2 csd
+set_parent 1/2 1
+take_focus 1/2 false
+accept_focus 1/2 false
+show 1/2
+wait
+
+create 1/3 csd
+set_parent 1/3 2
+show 1/3
+wait
+
+assert_stacking 1/1 1/2 1/3
+
+destroy 1/3
+wait
+
+assert_stacking 1/1 1/2

src/tests/stacking/closed-transient-no-input-parent.metatest

@@ -0,0 +1,22 @@
+new_client 1 x11
+create 1/1
+show 1/1
+wait
+
+create 1/2 csd
+set_parent 1/2 1
+accept_focus 1/2 false
+show 1/2
+wait
+
+create 1/3 csd
+set_parent 1/3 2
+show 1/3
+wait
+
+assert_stacking 1/1 1/2 1/3
+
+destroy 1/3
+
+wait
+assert_stacking 1/1 1/2