test: add test for default icon resource

wfassoc-cdylib/cbindgen/wfassoc.h

@@ -36,15 +36,6 @@ using CStyleString = const char*;
  * And we expose this type as an opaque handle for visiting your created object.
  */
 using Token = uint64_t;
-#else  // __cplusplus
-typedef const char *CStyleString;
-typedef uint64_t Token;
-#endif  // __cplusplus
-
-
-// Special treat for ICON because it may be defined by Windows header.
-#ifndef _WINDEF_
-#ifdef __cplusplus
 /** 
  * @brief Type representing an icon handle (opaque pointer)
  * 
@@ -52,9 +43,10 @@ typedef uint64_t Token;
  */
 using HICON = void*;
 #else  // __cplusplus
+typedef const char *CStyleString;
+typedef uint64_t Token;
 typedef void *HICON;
 #endif  // __cplusplus
-#endif
 
 
 #ifdef __cplusplus

wfassoc/tests/concept.rs

@@ -186,6 +186,9 @@ fn test_str_ref_str() {
 
 #[test]
 fn test_icon_rc() {
+    fn const_tester(icon: Result<IconRc, LoadIconRcError>) {
+        assert!(icon.is_ok())
+    }
     fn ok_tester(file: &str, index: u32) {
         let icon = IconRc::new(file, index, IconSizeKind::Small);
         assert!(icon.is_ok())
@@ -195,6 +198,9 @@ fn test_icon_rc() {
         assert!(icon.is_err())
     }
 
+    // Test 2 const value
+    const_tester(IconRc::GENERIC_APPLICATION(IconSizeKind::Small));
+    const_tester(IconRc::GENERIC_APPLICATION(IconSizeKind::Small));
     // We pick it from "jpegfile" ProgId
     ok_tester("imageres.dll", 72);
     ok_tester("notepad.exe", 0);