Add test to ensure non extended ASCII values are not parsed in value

src/parser/component.rs

@@ -80,6 +80,7 @@ pub fn consume_continuation_char(input: &mut &str) -> PResult<()> {
 
 #[cfg(test)]
 mod tests {
+    use proptest::prelude::*;
     use rstest::*;
 
     use super::*;
@@ -225,6 +226,15 @@ mod tests {
         assert_eq!(*given, remaining);
     }
 
+    proptest! {
+        /// Any non extended ASCII is not returned by the value parser.
+        #[test]
+        fn attribute_value_non_extended_ascii_not_parsed(s in r"[^\x00-\xFF]+") {
+            let parsed = attribute_value(&mut s.as_str()).unwrap();
+            prop_assert_eq!(parsed, "");
+        }
+    }
+
     #[rstest]
     #[case(
             &mut "    continuation value prefixed by a space\n",