refactor: move something and implement FileName

wfassoc/tests/concept.rs

@@ -1,5 +1,5 @@
 use std::str::FromStr;
-use wfassoc::concept::*;
+use wfassoc::win32::concept::*;
 
 // region: File Extension
 
@@ -230,3 +230,25 @@ fn test_expand_string() {
 }
 
 // endregion
+
+// region: File Name
+
+#[test]
+fn test_file_name() {
+    fn ok_tester(s: &str) {
+        let rv = FileName::from_str(s);
+        assert!(rv.is_ok());
+        let rv = rv.unwrap();
+        assert_eq!(s, rv.inner());
+    }
+    fn err_tester(s: &str) {
+        let rv = FileName::from_str(s);
+        assert!(rv.is_err());
+    }
+
+    ok_tester("GoodExecutable.exe");
+    err_tester("*.?xaml");
+    err_tester(r#"\\\lol///"#);
+}
+
+// endregion