tests/wayland: Move virtual output to lowest VKMS resolution

We want to run those tests in VKMS later with the same reference image.
To make the tests as close to each other as possible we use the same
resolution for the VKMS and the virtual output which is 640x480.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3350>

src/tests/wayland-fullscreen-test.c

@@ -110,8 +110,8 @@ toplevel_fullscreen (void)
   wait_for_first_frame (test_window);
 
   meta_window_get_frame_rect (test_window, &rect);
-  g_assert_cmpint (rect.width, ==, 100);
-  g_assert_cmpint (rect.height, ==, 100);
+  g_assert_cmpint (rect.width, ==, 640);
+  g_assert_cmpint (rect.height, ==, 480);
   g_assert_cmpint (rect.x, ==, 0);
   g_assert_cmpint (rect.y, ==, 0);
   assert_wayland_surface_size (test_window, 10, 10);
@@ -154,8 +154,8 @@ toplevel_fullscreen_ref_test (void)
     g_main_context_iteration (NULL, FALSE);
 
   meta_window_get_frame_rect (test_window, &rect);
-  g_assert_cmpint (rect.width, ==, 100);
-  g_assert_cmpint (rect.height, ==, 100);
+  g_assert_cmpint (rect.width, ==, 640);
+  g_assert_cmpint (rect.height, ==, 480);
   g_assert_cmpint (rect.x, ==, 0);
   g_assert_cmpint (rect.y, ==, 0);
   assert_wayland_surface_size (test_window, 10, 10);
@@ -173,7 +173,8 @@ on_before_tests (void)
 
   test_driver = meta_wayland_test_driver_new (compositor);
 
-  virtual_monitor = meta_create_test_monitor (test_context, 100, 100, 10.0);
+  virtual_monitor = meta_create_test_monitor (test_context,
+                                              640, 480, 60.0);
 
   wayland_test_client = meta_wayland_test_client_new (test_context,
                                                       "fullscreen");

src/tests/wayland-unit-tests.c

@@ -774,8 +774,8 @@ toplevel_bounds_monitors (void)
 
   clutter_virtual_input_device_notify_absolute_motion (virtual_pointer,
                                                        CLUTTER_CURRENT_TIME,
-                                                       550.0, 100.0);
-  wait_for_cursor_position (550.0, 100.0);
+                                                       700.0, 100.0);
+  wait_for_cursor_position (700.0, 100.0);
 
   wayland_test_client =
     meta_wayland_test_client_new (test_context, "xdg-toplevel-bounds");
@@ -837,8 +837,9 @@ on_before_tests (void)
     meta_context_get_wayland_compositor (test_context);
 
   test_driver = meta_wayland_test_driver_new (compositor);
+
   virtual_monitor = meta_create_test_monitor (test_context,
-                                              400, 400, 60.0);
+                                              640, 480, 60.0);
 }
 
 static void