ntdll/tests: Add test to check if GetTickCount is updated after sleeping.

dlls/ntdll/tests/time.c

@@ -199,7 +199,7 @@ static void test_user_shared_data_time(void)
 {
     KSHARED_USER_DATA *user_shared_data = (void *)0x7ffe0000;
     ULONGLONG t1, t2, t3;
-    int i = 0;
+    int i = 0, changed = 0;
 
     i = 0;
     do
@@ -253,6 +253,15 @@ static void test_user_shared_data_time(void)
            "USD InterruptTime / RtlQueryUnbiasedInterruptTime are out of order %s %s\n",
            wine_dbgstr_longlong(t2), wine_dbgstr_longlong(t3));
     }
+
+    for (i = 0; i < 100; i++)
+    {
+        t1 = GetTickCount();
+        Sleep(1);
+        t2 = GetTickCount();
+        if (t1 != t2) changed++;
+    }
+    todo_wine ok(changed >= 90, "tick count isn't updated after sleeping one millisecond (%d%% correct)\n", changed);
 }
 
 START_TEST(time)