[PATCH v2 1/2] user32/tests: Test for cursor position rounding errors in test_monitor_dpi().

[Conor McCarthy]

From: Conor McCarthy

Requires display mode emulation for failures to manifest.
---
 dlls/user32/tests/monitor.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/dlls/user32/tests/monitor.c b/dlls/user32/tests/monitor.c
index 206d9505705..7ad3970a646 100644
--- a/dlls/user32/tests/monitor.c
+++ b/dlls/user32/tests/monitor.c
@@ -3611,6 +3611,8 @@ static void test_monitor_dpi(void)
     DPI_AWARENESS_CONTEXT old_ctx;
     float scale_x, scale_y;
     BOOL ret, is_virtual;
+    INT x, y;
+    POINT pt;

if (!pGetDpiForMonitorInternal || !pSetThreadDpiAwarenessContext)
     {
@@ -3722,6 +3724,19 @@ static void test_monitor_dpi(void)
                 ok( fabs( dpi_y - system_dpi * scale_y ) < system_dpi * 0.05, "got MDT_RAW_DPI y %u\n", dpi_y );
             }

+            /* Test for cursor position rounding errors. To be meaninful, this requires display
+             * mode emulation. To enable it, run 'wine control desk.cpl' and set the checkbox. */
+            for (x = infos[i].rect.left; x < infos[i].rect.left + 64; ++x)
+            {
+                y = x - infos[i].rect.left + infos[i].rect.top;
+                SetCursorPos(x, y);
+                GetCursorPos(&pt);
+                todo_wine_if(pt.x != x)
+                ok(pt.x == x, "got x %ld, expected %d.\n", pt.x, x);
+                todo_wine_if(pt.y != y)
+                ok(pt.y == y, "got y %ld, expected %d.\n", pt.y, y);
+            }
+
             pSetThreadDpiAwarenessContext( old_ctx );
         }
     }