tests/stacking: Add a test for sloppy focus

Tests that
* the window under the cursor has focus
* focus_default_window won't move the focus away from a previously
  focused window even if the cursor is somewhere else

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3258>

src/tests/meson.build

@@ -708,6 +708,7 @@ stacking_tests = [
   'overview-focus',
   'suspend-state-timeout',
   'cloned-windows',
+  'sloppy-focus',
 ]
 
 foreach stacking_test: stacking_tests

src/tests/stacking/sloppy-focus.metatest

@@ -0,0 +1,62 @@
+resize_monitor default 800 600
+set_pref focus-mode sloppy
+set_pref focus-change-on-pointer-rest false
+
+move_cursor_to 150 50
+wait
+
+new_client w wayland
+
+create w/0 csd
+resize w/0 100 100
+show w/0
+
+create w/1 csd
+resize w/1 100 100
+show w/1
+
+wait_reconfigure
+
+move w/0 0 0
+move w/1 100 0
+
+wait_reconfigure
+
+assert_stacking w/0 w/1
+assert_focused w/1
+
+assert_position w/0 0 0
+assert_size w/0 100 100
+assert_position w/1 100 0
+assert_size w/1 100 100
+
+move_cursor_to 50 50
+
+assert_stacking w/0 w/1
+assert_focused w/0
+
+move_cursor_to 150 50
+
+assert_stacking w/0 w/1
+assert_focused w/1
+
+focus_default_window
+
+assert_stacking w/0 w/1
+assert_focused w/1
+
+local_activate w/0
+focus_default_window
+
+assert_stacking w/1 w/0
+assert_focused w/0
+
+move_cursor_to 50 50
+
+assert_stacking w/1 w/0
+assert_focused w/0
+
+move_cursor_to 150 50
+
+assert_stacking w/1 w/0
+assert_focused w/1

src/tests/test-runner.c

@@ -1301,6 +1301,21 @@ test_case_do (TestCase    *test,
 
           g_assert_true (g_settings_set_boolean (wm, "raise-on-click", value));
         }
+      else if (strcmp (argv[1], "focus-mode") == 0)
+        {
+          GDesktopFocusMode mode;
+
+          if (g_ascii_strcasecmp (argv[2], "click") == 0)
+            mode = G_DESKTOP_FOCUS_MODE_CLICK;
+          else if (g_ascii_strcasecmp (argv[2], "sloppy") == 0)
+            mode = G_DESKTOP_FOCUS_MODE_SLOPPY;
+          else if (g_ascii_strcasecmp (argv[2], "mouse") == 0)
+            mode = G_DESKTOP_FOCUS_MODE_MOUSE;
+          else
+            BAD_COMMAND("usage: %s %s [click|sloppy|mouse]", argv[0], argv[1]);
+
+          g_assert_true (g_settings_set_enum (wm, "focus-mode", mode));
+        }
       else if (strcmp (argv[1], "workspaces-only-on-primary") == 0)
         {
           gboolean value;
@@ -1309,6 +1324,14 @@ test_case_do (TestCase    *test,
 
           g_assert_true (g_settings_set_boolean (mutter, "workspaces-only-on-primary", value));
         }
+      else if (strcmp (argv[1], "focus-change-on-pointer-rest") == 0)
+        {
+          gboolean value;
+          if (!str_to_bool (argv[2], &value))
+            BAD_COMMAND("usage: %s %s [true|false]", argv[0], argv[1]);
+
+          g_assert_true (g_settings_set_boolean (mutter, "focus-change-on-pointer-rest", value));
+        }
       else {
         BAD_COMMAND("Unknown preference %s", argv[1]);
       }