Setup a testing bench

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/input.rs

@@ -14,12 +14,31 @@ pub struct TempleInput {
     range: Range<usize>,
 }
 
+impl TempleInput {
+    pub fn from_parts(backing: Arc<str>, range: Range<usize>) -> TempleInput {
+        TempleInput { backing, range }
+    }
+
+    pub fn into_parts(self) -> (Arc<str>, Range<usize>) {
+        (self.backing, self.range)
+    }
+}
+
 impl std::fmt::Debug for TempleInput {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "\"{}\"", self.as_str())
     }
 }
 
+impl From<String> for TempleInput {
+    fn from(value: String) -> Self {
+        let range = 0..value.len();
+        let backing = Arc::from(value);
+
+        TempleInput { backing, range }
+    }
+}
+
 impl From<&str> for TempleInput {
     fn from(value: &str) -> Self {
         let backing = Arc::from(value.to_string());