[client] tests: cover Wayland motion ordering

client/tests/CMakeLists.txt

@@ -33,6 +33,19 @@ set_tests_properties(lgmp-transport-tests PROPERTIES
   TIMEOUT 10
 )
 
+add_executable(wayland-motion-tests
+  motion_test.c
+)
+target_include_directories(wayland-motion-tests PRIVATE
+  "${CMAKE_CURRENT_SOURCE_DIR}/../displayservers/Wayland"
+)
+add_test(NAME wayland-motion-tests
+  COMMAND wayland-motion-tests
+)
+set_tests_properties(wayland-motion-tests PROPERTIES
+  TIMEOUT 10
+)
+
 find_package(GTest REQUIRED)
 find_program(WESTON_EXECUTABLE NAMES weston)
 if(NOT WESTON_EXECUTABLE)

client/tests/motion_test.c

@@ -0,0 +1,39 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "motion.h"
+#include "test.h"
+
+int main(void)
+{
+  struct WlMotion absFirst = { 0 };
+  struct WlMotion relFirst = { 0 };
+
+  wlMotionAbs(&absFirst, 100, 50);
+  wlMotionRel(&absFirst, 5, -2);
+  wlMotionRel(&relFirst, 5, -2);
+  wlMotionAbs(&relFirst, 100, 50);
+
+  CHECK(absFirst.x == 105);
+  CHECK(absFirst.y == 48);
+  CHECK(relFirst.x == 100);
+  CHECK(relFirst.y == 50);
+  return 0;
+}