feat: add test for SynthPointer

Add a new test file `test_SynthPointer.c` to test the functionality of the `SynthPointer` library. The test includes functions to check the creation of the synthetic pointer device, hover exit, down move, up move, and screen to global conversion.

CMakeLists.txt

@@ -6,3 +6,8 @@ set(CMAKE_C_STANDARD 99)
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 
 add_library(SynthPointer SHARED SynthPointer.c)
+
+include_directories(${CMAKE_SOURCE_DIR}/test)
+
+add_executable(tests test/test_SynthPointer.c test/unity.c)
+target_link_libraries(tests SynthPointer)

test/test_SynthPointer.c

@@ -0,0 +1,77 @@
+#include "../SynthPointer.h"
+#include "unity.h"
+#include <windows.h>
+
+HSYNTHETICPOINTERDEVICE device;
+POINTER_TYPE_INFO *info;
+DEVMODE devMode;
+
+typedef enum {
+  PEN_STATE_MASK = (POINTER_FLAG_INRANGE | POINTER_FLAG_INCONTACT | POINTER_FLAG_DOWN | POINTER_FLAG_UP | POINTER_FLAG_UPDATE),
+  PEN_HOVER = (POINTER_FLAG_INRANGE | POINTER_FLAG_UPDATE),
+  PEN_DOWN = (POINTER_FLAG_INRANGE | POINTER_FLAG_INCONTACT | POINTER_FLAG_DOWN),
+  PEN_CONTACT = (POINTER_FLAG_INRANGE | POINTER_FLAG_INCONTACT | POINTER_FLAG_UPDATE),
+  PEN_UP = (POINTER_FLAG_INRANGE | POINTER_FLAG_UP),
+  PEN_ENDHOVER = (POINTER_FLAG_UPDATE),
+} PEN_STATES;
+
+void setUp(void) {
+  device = CreateSynthPointer();
+  info = GetDefaultPointerTypeInfo();
+  devMode.dmSize = sizeof(DEVMODE);
+  EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &devMode);
+}
+
+void tearDown(void) {
+}
+
+void test_DBG(void) {
+  POINT global0 = _ScreenToGlobal(0, 0, 0);
+  POINT global1 = _ScreenToGlobal(0, 0, 1);
+
+  printf("global0: %d, %d\n", global0.x, global0.y);
+  printf("global1: %d, %d\n", global1.x, global1.y);
+
+  info->penInfo.pointerInfo.ptPixelLocation.x = global1.x;
+  info->penInfo.pointerInfo.ptPixelLocation.y = global1.y;
+  info->penInfo.pointerInfo.pointerFlags = PEN_CONTACT;
+
+  _injectPointer(device, info);
+}
+
+void test_CreateSynthPointer(void) {
+  TEST_ASSERT_NOT_NULL(device);
+}
+
+void test_HoverExit(void) {
+  HoverExit(device, info);
+  TEST_ASSERT_EQUAL_INT(PEN_ENDHOVER, info->penInfo.pointerInfo.pointerFlags);
+}
+
+void test_DownMove(void) {
+  Down(device, info);
+  TEST_ASSERT_EQUAL_INT(PEN_DOWN, info->penInfo.pointerInfo.pointerFlags);
+}
+
+void test_UpMove(void) {
+  Up(device, info);
+  TEST_ASSERT_EQUAL_INT(PEN_UP, info->penInfo.pointerInfo.pointerFlags);
+}
+
+void test_ScreenToGlobal(void) {
+    // This test is specific to  my screen setup
+    POINT global = _ScreenToGlobal(0, 0, 1);
+    TEST_ASSERT_EQUAL_INT(1920, global.x);
+    TEST_ASSERT_EQUAL_INT(0, global.y);
+}
+
+int main(void) {
+  UNITY_BEGIN();
+  RUN_TEST(test_CreateSynthPointer);
+  RUN_TEST(test_HoverExit);
+  RUN_TEST(test_DownMove);
+  RUN_TEST(test_UpMove);
+  /* RUN_TEST(test_ScreenToGlobal); */
+  /* RUN_TEST(test_DBG); */
+  return UNITY_END();
+}